# Energy Calculators

Here we discuss list of online weight Conversion calculators that help us for doing calculation easily.

British thermal units are a measure of heat energy. Specifically, one british thermal unit is equal to the amount of heat energy required to increase the temperature of one pound of water one degree Fahrenheit. They are often used as a way to rate the energy heat producing appliances such furnaces, and to price heating fuels such as natural gas.

The british thermal unit is a US customary unit of energy. British thermal units can be abbreviated as BTU; for example, 1 british thermal unit can be written as 1 BTU.

The joule is the energy equal to the force on an object of one newton at a distance of one meter.One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

#### How to convert BTU (IT) to Joules:

1 BTU_{IT} = 1055.05585262 J

So the energy conversion from BTU to joules is given by the formula:

E_{(J)} = 1055.05585262 ⋅ E_{(BTU)}

British thermal units are a measure of heat energy. Specifically, one british thermal unit is equal to the amount of heat energy required to increase the temperature of one pound of water one degree Fahrenheit. They are often used as a way to rate the energy heat producing appliances such furnaces, and to price heating fuels such as natural gas.

The british thermal unit is a US customary unit of energy. British thermal units can be abbreviated as BTU; for example, 1 british thermal unit can be written as 1 BTU.

One kilojoule is equal to 1,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for 10^{3}. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.

#### How to convert BTU to Kilojoules

How to convert BTU (IT) to kilojoules:

1 BTU_{IT} = 1.05505585262 kJ

So

E_{(kJ)} = 1.05505585262 ⋅ E_{(BTU)}

For example: when E=0.5 BTU,

E_{(kJ)} = 1.05505585262 ⋅ 0.5 BTU = 0.527528 kJ

British thermal units are a measure of heat energy. Specifically, one british thermal unit is equal to the amount of heat energy required to increase the temperature of one pound of water one degree Fahrenheit. They are often used as a way to rate the energy heat producing appliances such furnaces, and to price heating fuels such as natural gas.

The british thermal unit is a US customary unit of energy. British thermal units can be abbreviated as BTU; for example, 1 british thermal unit can be written as 1 BTU.

A kilowatt-hour is a measure of electrical energy equal to one kilowatt, or 1,000 watts, of power over a one hour period. Kilowatt-hours are a measure of electrical work performed over a period of time, and are often used as a way of measuring energy usage by electric companies.

Kilowatt-hours are usually abbreviated as kWh, although the formally adopted expression is kW·h. The abbreviation kW h is also sometimes used. For example, 1 kilowatt-hour can be written as 1 kWh, 1 kW·h, or 1 kW h. In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.

#### How to convert BTU to kWh

How to convert BTU (IT) to kilowatt-hour:

1 BTU_{IT} = 0.00029307107017 kWh

So the energy in kilowatt-hours E(kWh) is equal to 0.00029307107017 times the energy in BTUs E(BTU):

E_{(kWh)} = 0.00029307107017 × E_{(BTU)}

#### Example

Convert 3000 BTU to kWh:

E_{(kWh)} = 0.00029307107017 × 3000 BTU = 0.879 kWh

One calorie is equal to the heat needed to raise the temperature of one gram of water from 14.5 to 15.5 degrees Celsius. When measuring the energy content in foods, the large calorie, or kilocalorie is used, but it's often still just called a "calorie." When both the calorie and large calorie are used in the same context it is common to refer to the calorie as a "small calorie." Calories can be abbreviated as cal; for example, 1 calorie can be written as 1 cal.

The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second. The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

#### Small & large calories

Small calorie (cal) is the energy needed to increase 1 gram of water by 1°C at a pressure of 1 atmosphere.

Large calorie (Cal) is the energy needed to increase 1 kg of water by 1°C at a pressure of 1 atmosphere.

Large calorie is also called food calorie and is used as a unit of food energy.

#### How to convert from calories to joules

#### Thermochemical calories to joules

1 cal_{th} = 4.184 J

The energy in joules E_{(J)} is equal to 4.184 times the energy in thermochemical calories E_{(calth)}:

E_{(J)} = 4.184 × E_{(calth)}

#### Example

Convert 300 cal_{th} to joules.

E_{(J)} = 4.184 × 300cal_{th} = 1255.2 J

15°C calories to joules

1 cal_{15} = 4.1855 J

The energy in joules E_{(J)} is equal to 4.1855 times the energy in 15°C calories E_{(cal15)}:

E_{(J)} = 4.1855 × E_{(cal15)}

#### Example

Convert 300 cal_{15} to joules.

E_{(J)} = 4.1855 × 300cal_{15} = 1255.65 J

#### Large/food calories to joules

1 Cal = 4.184 kJ = 4184 J

The energy in joules E_{(J)} is equal to 4184 times the energy in large/food calories E_{(Cal)}:

E_{(J)} = 4184 × E_{(Cal)}

#### Example

Convert 0.3 Cal to joules.

E_{(J)} = 4184 × 0.3 Cal = 1255.2 J

A calorie (symbol: cal) is a unit of energy defined as the amount of energy required to increase the temperature of one gram of water by one °C. This is referred to as the small calorie or the gram calorie, and is equal to 4.1868 joules, the SI (International System of Units) unit of energy. A large calorie (symbol: Cal), also known as a kilogram calorie (symbol: Cal), is technically a kilocalorie (symbol: kcal), the equivalent of 1000 small calories, but is also sometimes referred to as simply "Calorie." Large calories are usually used for labeling foods, and as such, is known as the food calorie.

Although the calorie can be used with SI, since the official adoption of SI in 1960, the calorie is considered obsolete. Despite this, the large calorie is still widely used as a unit of food energy, alongside, or in place of the SI unit of food energy, the kilojoule. The use of a capital "C" in Calorie is intended to denote the use of kilocalories rather than calories denoting a single calorie. This is not often understood however, resulting in some confusion when foods are only labeled as Calories rather than kilocalories. Calories are also used within scientific contexts, such as chemistry. In these contexts, the term being referenced is most often the small calorie, though measurements are often reported in kilocalories.

A kilocalorie (symbol: kcal or Cal) is a unit of energy defined based on the calorie and is equal to 1000 calories or 4.1868 kilojoules. A calorie (small calorie) is defined as the amount of energy required to increase the temperature of one gram of water by one °C. Kilocalories are also referred to as large calories or food calories, and are sometimes referred to as Calories, which can be ambiguous, and mistaken for the small calorie.

Although the kilocalorie is generally considered an obsolete unit, it is still widely used alongside the SI unit of kilojoule to measure food energy. In countries where SI has not been adopted, such as the US, kilocalories, typically referred to as simply "Calories," are still the preferred measurement of food energy. Kilocalories are also sometimes seen in chemistry.The kilo prefix is based on the SI prefixes, but calories with prefixes beyond the multiple of kilo are not commonly used.

#### Small & large calories

Small calorie (cal) is the energy needed to increase 1 gram of water by 1°C at a pressure of 1 atmosphere.

Large calorie (Cal) is the energy needed to increase 1 kg of water by 1°C at a pressure of 1 atmosphere.

Large calorie is also called food calorie and is used as a unit of food energy.

#### How to convert calories to kcal

cal to kcal - small calories to small kilocalories

1 kcal = 1000 cal

The energy in small kilocalories (kcal) is equal to the energy in small calories (cal) divided by 1000:

E_{(kcal)} = E_{(cal)} / 1000

#### Example

Convert 6000cal to small kcal:

E_{(kcal)} = 6000cal / 1000 = 6 kcal

Cal to kcal - large calories to small kilocalories

1 kcal = 1 Cal

The energy in small kilocalories (kcal) is equal to the energy in large calories (Cal):

E_{(kcal)} = E_{(Cal)}

#### Example

Convert 6Cal to kcal:

E_{(kcal)} = 6Cal = 6kcal

The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

British thermal units are a measure of heat energy. Specifically, one british thermal unit is equal to the amount of heat energy required to increase the temperature of one pound of water one degree Fahrenheit. They are often used as a way to rate the energy heat producing appliances such furnaces, and to price heating fuels such as natural gas. The british thermal unit is a US customary unit of energy. British thermal units can be abbreviated as BTU; for example, 1 british thermal unit can be written as 1 BTU.

#### How to convert Joules to BTU

1 J = 0.00094781712 BTU_{IT}

1 BTU_{IT} = 1055.05585262 J

The energy conversion of joules to BTU is given by the formula:

E_{(BTU)} = E_{(J)} / 1055.05585262 = 0.00094781712 ⋅ E_{(J)}

For example: when E=500J,

E_{(BTU)} = 500J / 1055.05585262 = 0.473909 BTU

The joule is the energy equal to the force on an object of one newton at a distance of one meter.[1] One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second. One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second. The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

One calorie is equal to the heat needed to raise the temperature of one gram of water from 14.5 to 15.5 degrees Celsius. When measuring the energy content in foods, the large calorie, or kilocalorie is used, but it's often still just called a "calorie." When both the calorie and large calorie are used in the same context it is common to refer to the calorie as a "small calorie." Calories can be abbreviated as cal; for example, 1 calorie can be written as 1 cal.

#### Small & large calories

Small calorie (cal) is the energy needed to increase 1 gram of water by 1°C at a pressure of 1 atmosphere.

Large calorie (Cal) is the energy needed to increase 1 kg of water by 1°C at a pressure of 1 atmosphere.

Large calorie is also called food calorie and is used as a unit of food energy.

#### How to convert from joules to calories

#### Joules to thermochemical calories

1 cal_{th} = 4.184 J

The energy in thermochemical calories E_{(calth)} is equal to the energy in joules E_{(J)} divided by 4.184:

E_{(cal)} = E_{(J)} / 4.184

#### Example

Convert 600 joules to thermochemical calories.

E_{(cal)} = 600J / 4.184 = 143.4 cal_{th}

Joules to 15°C calories

1 cal_{15} = 4.1855 J

The energy in 15°C calories E(cal15) is equal to the energy in joules E(J) divided by 4.1855:

E_{(cal15)} = E_{(J)} / 4.1855

#### Example

Convert 600 joules to 15°C calories.

E_{ (cal15)} = 600J / 4.1855 = 143.352 cal_{15}

Joules to large/food calories

1 Cal = 4.184 kJ = 4184 J

The energy in large/food calories E_{(Cal)} is equal to the energy in joules E_{(J)} divided by 4184:

E_{(Cal)} = E_{(J)} / 4184

#### Example

Convert 600 joules to food calories.

E_{(Cal)} = 600J / 4184 = 0.1434 Cal

The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

One kilojoule is equal to 1,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for 10^{3}. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.

#### How to convert joules to kilojoules

One joule is equal to thousandth of a kilojoule:

1J = 0.001kJ

The energy in kilojoules E_{(kJ)} is equal to the energy in joules E_{(J)} divided by 1000:

E_{(kJ)} = E_{(J)} / 1000

#### Example

Convert 500 joules to kilojoules.

The energy E in kilojoules (kJ) is equal to 500 joules (J) divided by 1000:

E_{(kJ)} = 500J / 1000 = 0.5kJ

The joule is the energy equal to the force on an object of one newton at a distance of one meter.[1] One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

A kilowatt-hour is a measure of electrical energy equal to one kilowatt, or 1,000 watts, of power over a one hour period. Kilowatt-hours are a measure of electrical work performed over a period of time, and are often used as a way of measuring energy usage by electric companies.

Kilowatt-hours are usually abbreviated as kWh, although the formally adopted expression is kW·h. The abbreviation kW h is also sometimes used. For example, 1 kilowatt-hour can be written as 1 kWh, 1 kW·h, or 1 kW h.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.

#### How to convert joules to kWh

One joule is equal to 2.777778⋅10^{-7} kilowatt-hours:

1J = 2.777778⋅10^{-7}kWh = (1/3600000)kWh

So the energy in kilowatt-hour E_{(kWh)} is equal to the energy in joules E_{(J)} divided by 3600000:

E_{(kWh)} = E_{(J)} / 3600000 = E(J) ⋅ 2.777778⋅10^{-7}

One calorie is equal to the heat needed to raise the temperature of one gram of water from 14.5 to 15.5 degrees Celsius. When measuring the energy content in foods, the large calorie, or kilocalorie is used, but it's often still just called a "calorie." When both the calorie and large calorie are used in the same context it is common to refer to the calorie as a "small calorie."

Calories can be abbreviated as cal; for example, 1 calorie can be written as 1 cal.

One kilojoule is equal to 1,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter. The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for 10^{3}. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.

#### Small & large calories

Small calorie (cal) is the energy needed to increase 1 gram of water by 1°C at a pressure of 1 atmosphere.

Large calorie (Cal) is the energy needed to increase 1 kg of water by 1°C at a pressure of 1 atmosphere.

Large calorie is also called food calorie and is used as a unit of food energy.

#### How to convert from calories to kilojoules

Thermochemical calories to kJ

1 cal_{th} = 0.004184 kJ

1 kJ = 239.005736 cal_{th}

The energy in kilojoules E_{(kJ)} is equal to the energy in thermochemical calories E_{(calth)} divided by 239.005736:

E_{(kJ)} = E_{(calth)} / 239.005736

#### Example

Convert 300 cal_{th} to kilojoules.

E_{(kJ)} = 300cal_{th} / 239.005736 = 1.2552 kJ

15°C calories to kJ

1 cal_{15} = 0.0041855 kJ

1 kJ = 238.9201 cal_{15}

The energy in kilojoules E_{(kJ)} is equal to the energy in 15°C calories E_{(cal15)} divided by 238.9201:

E_{(kJ)} = E_{(cal15)} / 238.9201

#### Example

Convert 300 cal_{15} to kilojoules.

E_{(kJ)} = 300cal_{15} / 238.9201 = 1.25565 kJ

Large/food calories to kJ

1 Cal = 4.184 kJ

1 kJ = 0.239 Cal

The energy in kilojoules E_{(kJ)} is equal to 4184 times the energy in large/food calories E_{(Cal)}:

E_{(kJ)} = 4.184 × E_{(calth)}

#### Example

Convert 0.3 Cal to kilojoules.

E_{(kJ)} = 4.184 × 0.3 Cal = 1.2552 kJ

Electron volts to giga-electron volts converter on this page calculates how many giga-electron volts are in 'X' electron volts (where 'X' is the number of electron volts to convert to giga-electron volts). In order to convert a value from electron volts to giga-electron volts (from eV to GeV) type the number of eV to be converted to GeV and then click on the 'convert' button.

#### How to convert eV to GeV

One gigaelectron-volt is equal to 10^{9} electron-volts:

1 GeV = 10^{9} eV

The energy in gigaelectron-volts E_{(GeV)} is equal to the energy in electron-volts E_{(eV)} divided by 10_{9}:

E_{(GeV)} = E_{(eV)} / 10_{9} = E_{(eV)} / 1000000000

#### Example

Convert 5eV to GeV:

E_{(GeV)} = 5eV / 10^{9} = 5×10^{-9}GeV

The electronvolt is a unit of energy used in physics, most commonly in electrostatic particle accelerator sciences.

Electronvolts can be abbreviated as eV; for example, 1 electronvolt can be written as 1 eV.

Energy in electronvolts can be expressed using the following formula: E = qV

The energy E in electronvolts is equal to the electric charge q in elementary charge times the potential difference V in volts.

The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second. The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

#### How to convert eV to joules

One electron-volt is equal to 1.602176565⋅10^{-19} joules:

1eV = 1.602176565e^{-19} J = 1.602176565⋅10^{-19} J

So the energy in joules E_{(J)} is equal to the energy in electron-volts E_{(eV)} times 1.602176565⋅10^{-19}:

E_{(J)} = E_{(eV)} × 1.602176565⋅10^{-19}

The electronvolt is a unit of energy used in physics, most commonly in electrostatic particle accelerator sciences.

Electronvolts can be abbreviated as eV; for example, 1 electronvolt can be written as 1 eV.

Energy in electronvolts can be expressed using the following formula: E = qV

The energy E in electronvolts is equal to the electric charge q in elementary charge times the potential difference V in volts.

Kiloelectronvolts can be abbreviated as keV; for example, 1 kiloelectronvolt can be written as 1 keV.

#### How to convert eV to keV

One electron-volt is equal to thousandth of a kiloelectron-volt:

1eV = 0.001keV

The energy in kiloelectron-volt E_{(keV)} is equal to the energy in electron-volt E_{(eV)} divided by 1000:

E_{(keV)} = E_{(eV)} / 1000

#### Example

Convert 500eV to keV:

E_{(keV)} = 500eV / 1000 = 0.5keV

The electronvolt is a unit of energy used in physics, most commonly in electrostatic particle accelerator sciences.

Electronvolts can be abbreviated as eV; for example, 1 electronvolt can be written as 1 eV.

Energy in electronvolts can be expressed using the following formula: E = qV

The energy E in electronvolts is equal to the electric charge q in elementary charge times the potential difference V in volts.

Megaelectronvolts can be abbreviated as MeV; for example, 1 megaelectronvolt can be written as 1 MeV.

#### How to convert eV to MeV

One electron-volt is equal to millionth of a megaelectron-volt:

1eV = 0.000001MeV

The energy in megaelectron-volt E_{(MeV)} is equal to the energy in electron-volt E_{(eV)} divided by 1000000:

E_{(MeV)} = E_{(eV)} / 1000000

#### Example

Convert 500eV to MeV:

E_{(MeV)} = 500eV / 1000000 = 0.0005MeV

In physics, an electronvolt (symbol eV, also written electron-volt and electron volt) is the amount of kinetic energy gained by a single electron accelerating from rest through an electric potential difference of one volt in vacuum. When used as a unit of energy, the numerical value of 1 eV in joules (symbol J) is equivalent to the numerical value of the charge of an electron in coulombs (symbol C). Under the 2019 redefinition of the SI base units, this sets 1 eV equal to the exact value 1.602176634×10^{−19} J.

Giga-electron volts to electron volts conversion calculator calculates how many electron volts are in 'X' giga-electron volts (where 'X' is the number of giga-electron volts to convert to electron volts). In order to convert a value from giga-electron volts to electron volts (from GeV to eV) simply type the number of GeV to be converted to eV and then click on the 'convert' button.

#### How to convert GeV to eV

One gigaelectron-volt is equal to 10^{9} electron-volts:

1 GeV = 10^{9} eV

The energy in electron-volts E_{(eV)} is equal to the energy in gigaelectron-volts E_{(GeV)} times 1000000000:

E_{(eV)} = E_{(GeV)} × 10^{9} = E_{(GeV)} × 1000000000

#### Example

Convert 5GeV to eV:

E_{(eV)} = 5GeV × 10^{9} = 5×10^{9} eV

The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

The electronvolt is a unit of energy used in physics, most commonly in electrostatic particle accelerator sciences.

Electronvolts can be abbreviated as eV; for example, 1 electronvolt can be written as 1 eV.

Energy in electronvolts can be expressed using the following formula: E = qV

The energy E in electronvolts is equal to the electric charge q in elementary charge times the potential difference V in volts.

How to convert joules to eV

One joule is equal to 6.241509⋅10^{18} electron-volts:

1J = 6.241509e18 eV = 6.241509⋅10^{18} eV

So the energy in electron-volts E_{(eV)} is equal to the energy in joules E_{(J)} times 6.241509⋅10^{18}:

E_{(eV)} = E_{(J)} × 6.241509⋅10^{18}

The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

One kilocalorie, is equal to the heat needed to raise the temperature of one kilogram of water from 14.5 to 15.5 degrees Celsius.

Kilocalories can be abbreviated as kcal; for example, 1 kilocalorie can be written as 1 kcal.

When being used to measure nutrition or metabolic processes, the large calorie is used, which is equal to one kilocalorie.

#### How to convert from joules to kcal

Joules to thermochemical / food kilocalories

1 kcal_{th = 4184 J}

The energy in joules E_{(J)} is equal to the energy in kilocalories E_{(kcal-th)} divided by 4184:

E_{(kcal)}

= E

_{(J)} / 4184

#### Example

Convert 5000 joules to kilocalories.

E_{(kcal)} = 5000 J / 4184 = 1.195 kcal

Joules to international kilocalories

1 kcal_{IT} = 4186.8 J

The energy in joules E_{(J)} is equal to the energy in international kilocalories E_{(kcal-IT)} divided by 4186.8:

E_{(kcal-IT)} = E_{(J)} / 4186.8

#### Example

Convert 5000 joules to kilocalories.

E_{(kcal-IT)} = 5000 J / 4186.8 = 1.194 kcal_{IT}

Joules to 15°C kilocalories

1 kcal15 = 4185.5 J

The energy in joules E(J) is equal to the energy in 15°C kilocalories E(kcal15) divided by 4185.5:

E_{(kcal15)} = E_{(J)} / 4185.5

#### Example

Convert 5000 joules to kilocalories.

E(kcal_{15}) = 5000 J / 4185.5 = 1.195 kcal_{15}

Joules to 20°C kilocalories

1 kcal_{20} = 4182 J

The energy in joules E_{(J)} is equal to the energy in 20°C kilocalories E_{(kcal20)} divided by 4182:

E_{(kcal20)} = E_{(J)} / 4182

#### Example

Convert 5000 joules to kilocalories.

E_{(kcal20)} = 5000 J / 4182 = 1.196 kcal_{20}

One kilocalorie, is equal to the heat needed to raise the temperature of one kilogram of water from 14.5 to 15.5 degrees Celsius. Kilocalories can be abbreviated as kcal; for example, 1 kilocalorie can be written as 1 kcal. When being used to measure nutrition or metabolic processes, the large calorie is used, which is equal to one kilocalorie.

One calorie is equal to the heat needed to raise the temperature of one gram of water from 14.5 to 15.5 degrees Celsius. When measuring the energy content in foods, the large calorie, or kilocalorie is used, but it's often still just called a "calorie." When both the calorie and large calorie are used in the same context it is common to refer to the calorie as a "small calorie." Calories can be abbreviated as cal; for example, 1 calorie can be written as 1 cal.

#### Small & large calories

Small calorie (cal) is the energy needed to increase 1 gram of water by 1°C at a pressure of 1 atmosphere.

Large calorie (Cal) is the energy needed to increase 1 kg of water by 1°C at a pressure of 1 atmosphere.

Large calorie is also called food calorie and is used as a unit of food energy.

#### How to convert kcal to calories

kcal to cal - small kilocalories to small calories

1 kcal = 1000 cal

The energy in small calories (cal) is equal to 1000 times the energy in small kilocalories (kcal):

E_{(cal)} = 1000 × E_{(kcal)}

#### Example

Convert 6kcal to small calories:

E_{(cal)} = 1000 × 6kcal = 6000 cal

kcal to Cal - small kilocalories to large calories

1 Cal = 1 kcal

The energy in large calories (Cal) is equal to the energy in small kilocalories (kcal):

E_{(Cal)} = E_{(kcal)}

#### Example

Convert 6 kcal to large calories:

E_{(Cal)} = 6 kcal = 6 Cal

One kilojoule is equal to 1,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for 10^{3}. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.

British thermal units are a measure of heat energy. Specifically, one british thermal unit is equal to the amount of heat energy required to increase the temperature of one pound of water one degree Fahrenheit. They are often used as a way to rate the energy heat producing appliances such furnaces, and to price heating fuels such as natural gas.

The british thermal unit is a US customary unit of energy. British thermal units can be abbreviated as BTU; for example, 1 british thermal unit can be written as 1 BTU.

#### How to convert Kilojoules to BTU

1 kJ = 0.94781712 BTU_{(IT)}

1 BTU_{(IT)} = 1.05505585262 kJ

The energy E_{(BTU)} in BTUs is equal to 0.94781712 times the energy E_{(kJ)} in kilojoules (kJ):

E_{(BTU)} = E_{(kJ)} / 1.05505585262 = 0.94781712 ⋅ E_{(kJ)}

For example: when E=0.5kJ,

E_{(BTU)} = 0.5kJ / 1.05505585262 = 0.473909 BTU

One kilojoule is equal to 1,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for 10^{3}. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.

The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

#### How to convert kilojoules to joules

One kilojoules is equal to 1000 joules:

1kJ = 1000J

The energy E_{(J)} in joules (J) is equal to the energy E_{(kJ)} in kilojoules times 1000:

E_{(J)} = E_{(kJ)} × 1000

#### Example

Convert 3 kilojoules to joules.

The energy E in joules (J) is equal to 3 kilojoules times 1000:

E_{(J)} = 3kJ × 1000 = 3000J

A kilowatt-hour is a measure of electrical energy equal to one kilowatt, or 1,000 watts, of power over a one hour period. Kilowatt-hours are a measure of electrical work performed over a period of time, and are often used as a way of measuring energy usage by electric companies.

Kilowatt-hours are usually abbreviated as kWh, although the formally adopted expression is kW·h. The abbreviation kW h is also sometimes used. For example, 1 kilowatt-hour can be written as 1 kWh, 1 kW·h, or 1 kW h.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.

British thermal units are a measure of heat energy. Specifically, one british thermal unit is equal to the amount of heat energy required to increase the temperature of one pound of water one degree Fahrenheit. They are often used as a way to rate the energy heat producing appliances such furnaces, and to price heating fuels such as natural gas.

The british thermal unit is a US customary unit of energy. British thermal units can be abbreviated as BTU; for example, 1 british thermal unit can be written as 1 BTU.

#### How to convert kWh to BTU

1 kWh = 3412.14163312794 BTU_{IT}

So the energy in BTUs E_{(BTU)} is equal to 3412.1416.. times the energy in kilowatt-hour E_{(kWh)}:

E_{(BTU)} = 3412.14163312794 × E_{(kWh)}

#### Example

Convert 5 kWh to BTU:

E_{(BTU)} = 3412.14163312794 × 5 kWh = 17060.708 BTU

A kilowatt-hour is a measure of electrical energy equal to one kilowatt, or 1,000 watts, of power over a one hour period. Kilowatt-hours are a measure of electrical work performed over a period of time, and are often used as a way of measuring energy usage by electric companies.

Kilowatt-hours are usually abbreviated as kWh, although the formally adopted expression is kW·h. The abbreviation kW h is also sometimes used. For example, 1 kilowatt-hour can be written as 1 kWh, 1 kW·h, or 1 kW h.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.

The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

#### How to convert kWh to joules

One kilowatt-hour is equal to 3600000 joules:

1kWh = 3600000J = 3.6⋅10^{6}J = 3.6MJ

So the energy in joules E_{(J)}

is equal to 3600000 times the energy in kilowatt-hour E

_{(kWh)}:

E_{(J)} = 3600000 ⋅ E_{(kWh)}

One kilocalorie, is equal to the heat needed to raise the temperature of one kilogram of water from 14.5 to 15.5 degrees Celsius.

Kilocalories can be abbreviated as kcal; for example, 1 kilocalorie can be written as 1 kcal.

When being used to measure nutrition or metabolic processes, the large calorie is used, which is equal to one kilocalorie.

The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

#### How to convert from kcal to joules

Thermochemical / food kilocalories to joules

1 kcal_{th} = 4184 J

The energy in joules E_{(J)} is equal to 4184 times the energy in thermochemical / food kilocalories E_{(kcal)}:

E_{(J)} = 4184 × E_{(kcal-th)}

#### Example

Convert 0.3 kcal_{th} to joules.

E_{(J)}

= 4184 × 0.3 kcal

_{th} = 1255.2 J

International kilocalories to joules

1 kcal_{IT}

= 4186.8 J

The energy in joules E_{(J)} is equal to 4186.8 times the energy in international kilocalories E_{(kcal-IT)}:

E_{(J)} = 4186.8 × E_{(kcal-IT)}

#### Example

Convert 0.3 kcal_{IT} to joules.

E_{(J)} = 4186.8 × 0.3kcal_{IT} = 1256.04 J

15°C kilocalories to joules

1 kcal_{15} = 4185.5 J

The energy in joules E_{(J)} is equal to 4185.5 times the energy in 15°C kilocalories E_{(kcal15)}

:

E_{(J)} = 4185.5 × E_{(kcal15)}

#### Example

Convert 0.3 kcal_{15}

to joules.

E_{(J)} = 4185.5 × 0.3kcal_{15} = 1255.65 J

20°C kilocalories to joules

1 kcal_{20} = 4182 J

The energy in joules E_{(J)} is equal to 4182 times the energy in 20°C kilocalories E_{(kcal20)}:

E_{(J)} = 4182 × E_{(kcal20)}

#### Example

Convert 0.3 kcal20 to joules.

E_{(J)} = 4182 × 0.3kcal_{20} = 1254.6 J

One kilocalorie, is equal to the heat needed to raise the temperature of one kilogram of water from 14.5 to 15.5 degrees Celsius.

Kilocalories can be abbreviated as kcal; for example, 1 kilocalorie can be written as 1 kcal.

When being used to measure nutrition or metabolic processes, the large calorie is used, which is equal to one kilocalorie.

One kilojoule is equal to 1,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for 10^{3}. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.

#### How to convert from kcal to kilojoules

Thermochemical / food kilocalories to kilojoules

1 kcal_{th = 4.184 kJ}

The energy in kilojoules E_{(kJ)} is equal to 4.184 times the energy in thermochecmical / food kilocalories E_{(kcal)}:

E_{(kJ)} = 4.184 × E_{(kcal-th)}

#### Example

Convert 0.3 kcal_{th} to kilojoules.

E_{(kJ)} = 4.184 × 0.3 kcal_{th} = 1.2552 kJ

International kilocalories to kilojoules

1 kcal_{IT} = 4.1868 kJ

The energy in kilojoules E_{(kJ)} is equal to 4.1868 times the energy in international kilocalories E_{(kcal-IT)}:

E_{(kJ)} = 4.1868 × E_{(kcal-IT)}

#### Example

Convert 0.3 kcal_{IT} to kilojoules.

E_{(kJ)} = 4.1868 × 0.3kcal_{IT} = 1.25604 kJ

15°C kilocalories to kilojoules

1 kcal_{15} = 4.1855 kJ

The energy in kilojoules E_{(kJ)} is equal to 4.1855 times the energy in 15°C kilocalories E_{(kcal15)}:

E_{(kJ)} = 4.1855 × E_{(kcal15)}

#### Example

Convert 0.3 kcal_{15} to kilojoules.

E_{(kJ)}

= 4.1855 × 0.3kcal

_{15} = 1.25565 kJ

20°C kilocalories to kilojoules

1 cal_{20} = 4.182 kJ

The energy in kilojoules E_{(kJ)} is equal to 4.182 times the energy in 20°C kilocalories E_{(kcal20)}:

E_{(kJ)} = 4.182 × E_{(kcal20)}

#### Example

Convert 0.3 kcal_{20}

to kilojoules.

E_{(kJ)} = 4.182 × 0.3kcal_{20} = 1.2546 kJ

Kiloelectronvolts can be abbreviated as keV; for example, 1 kiloelectronvolt can be written as 1 keV.

The electronvolt is a unit of energy used in physics, most commonly in electrostatic particle accelerator sciences.

Electronvolts can be abbreviated as eV; for example, 1 electronvolt can be written as 1 eV.

Energy in electronvolts can be expressed using the following formula: E = qV

The energy E in electronvolts is equal to the electric charge q in elementary charge times the potential difference V in volts.

#### How to convert keV to eV

One kiloelectron-volt is equal to 1000 electron-volts:

1keV = 1000eV

The energy in electron-volts E_{(eV)} is equal to the energy in kiloelectron-volts E_{(keV)} times 1000:

E_{(eV)}

= E

_{(keV)} × 1000

#### Example

Convert 5keV to eV:

E_{(eV)} = 5keV × 1000 = 5000eV

One kilojoule is equal to 1,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for 10^{3}. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.

One calorie is equal to the heat needed to raise the temperature of one gram of water from 14.5 to 15.5 degrees Celsius.

When measuring the energy content in foods, the large calorie, or kilocalorie is used, but it's often still just called a "calorie." When both the calorie and large calorie are used in the same context it is common to refer to the calorie as a "small calorie."

Calories can be abbreviated as cal; for example, 1 calorie can be written as 1 cal.

#### Small & large calories

Small calorie (cal) is the energy needed to increase 1 gram of water by 1°C at a pressure of 1 atmosphere.

Large calorie (Cal) is the energy needed to increase 1 kg of water by 1°C at a pressure of 1 atmosphere.

Large calorie is also called food calorie and is used as a unit of food energy.

#### How to convert from kilojoules to calories

Kilojoules to thermochemical calories

1 cal_{th} = 0.004184 kJ

1 kJ = 239.0057 cal_{th}

The energy in thermochemical calories E_{(calth)} is equal to the energy in kilojoules E_{(kJ)} times 239.0057:

E_{(cal)} = E_{(kJ)} × 239.0057

#### Example

Convert 0.6 kilojoules to thermochemical calories.

E_{(cal)} = 0.6kJ × 239.0057 = 143.4 cal_{th}

Kilojoules to 15°C calories

1 cal_{15} = 0.0041855 kJ

1 kJ = 238.9201 cal_{15}

The energy in 15°C calories E_{(cal15)} is equal to the energy in kilojoules E_{(kJ)} times 238.9201:

E_{(cal15)} = E_{(kJ)} × 238.9201

#### Example

Convert 0.6 kilojoules to 15°C calories.

E_{(cal15)} = 0.6kJ × 238.9201 = 143.352 cal_{15}

Kilojoules to large/food calories

1 Cal = 4.184 kJ

1 kJ = 0.239 Cal

The energy in large/food calories E_{(Cal)} is equal to the energy in kilojoules E_{(kJ)} times 0.239:

E_{(Cal)} = E_{(kJ)} × 0.239

#### Example

Convert 0.6 kilojoules to food calories.

E_{(Cal)} = 0.6kJ × 0.239 = 0.1434 Cal

One kilojoule is equal to 1,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for 10^{3}. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.

One kilocalorie, is equal to the heat needed to raise the temperature of one kilogram of water from 14.5 to 15.5 degrees Celsius.

Kilocalories can be abbreviated as kcal; for example, 1 kilocalorie can be written as 1 kcal.

When being used to measure nutrition or metabolic processes, the large calorie is used, which is equal to one kilocalorie.

#### How to convert from kilojoules to kcal

Kilojoules to thermochemical / food kilocalories

1 kcal_{th} = 4.184 kJ

The energy in kilocalories E_{(kcal-th)} is equal to the energy in kilojoules E_{(kJ)} divided by 4.184:

E_{(kcal)} = E_{(kJ)} / 4.184

#### Example

Convert 5 kilojoules to kilocalories.

E_{(kcal)} = 5 kJ / 4.184 = 1.195 kcal

Kilojoules to international kilocalories

1 kcal_{IT} = 4.1868 kJ

The energy in international kilocalories E_{(kcal-IT)} is equal to the energy in kilojoules E_{(kJ)} divided by 4.1868:

E_{(kcal-IT)} = E_{(kJ)} / 4.1868

Example

Convert 5 kilojoules to kilocalories.

E_{(kcal-IT)} = 5 kJ / 4.1868 = 1.194 kcal_{IT}

Kilojoules to 15°C kilocalories

1 kcal_{15} = 4.1855 kJ

The energy in 15°C kilocalories E_{(kcal15)} is equal to the energy in kilojoules E_{(kJ)} divided by 4.1855:

E_{(kcal15)} = E_{(kJ)} / 4.1855

#### Example

Convert 5 kilojoules to kilocalories.

E_{(kcal15)} = 5 kJ / 4.1855 = 1.195 kcal_{15}

Kilojoules to 20°C kilocalories

1 kcal_{20} = 4.182 kJ

The energy in 20°C kilocalories E_{(kcal20)} is equal to the energy in kilojoules E_{(kJ)} divided by 4.182:

E_{(kcal20)} = E_{(kJ)} / 4.182

#### Example

Convert 5 kilojoules to kilocalories.

E_{(kcal20)} = 5 kJ / 4.182 = 1.196 kcal_{20}

Megaelectronvolts can be abbreviated as MeV; for example, 1 megaelectronvolt can be written as 1 MeV.

The electronvolt is a unit of energy used in physics, most commonly in electrostatic particle accelerator sciences.

Electronvolts can be abbreviated as eV; for example, 1 electronvolt can be written as 1 eV.

Energy in electronvolts can be expressed using the following formula: E = qV

The energy E in electronvolts is equal to the electric charge q in elementary charge times the potential difference V in volts.

#### How to convert MeV to eV

One megaelectron-volt is equal to 1000000 electron-volts:

1MeV = 1000000eV

The energy in electron-volts E_{(eV)} is equal to the energy in megaelectron-volts E_{(MeV)} times 1000000:

E_{(eV)} = E_{(MeV)} × 1000000

#### Example

Convert 5MeV to eV:

E_{(eV)} = 5MeV × 1000000 = 5000000eV