Energy Conversion

This tool calculates equivalent energy values across multiple units, including British Thermal Units (BTU), Joules (J), kilowatt-hours (kWh), therms (THM), and calories (both nutritional and thermochemical). Simply select the target unit, enter the value to convert from, and the converted result will appear instantly.

Energy Conversion
BTU
J
kWh
THM
Cal
cal
Formula
How many joules are in one BTU?

1 BTU = 1055.05585262 J

How many BTU's are in one joule?

1 Joule = 0.00094781712 BTU

Introduction

How is Energy Converted?

Energy conversion is the transformation of energy from one form into another to make it useful for human activity. While energy comes in many forms—including kinetic, potential, gravitational, and electrical—it follows the Law of Conservation of Energy: energy can be transferred or transformed, but the total amount always remains the same.

Examples of Energy Conversions

  • The Sun: Converts Nuclear Energy into Heat and Light Energy.
  • Our Bodies: Convert Chemical Energy (from food) into Mechanical Energy (for movement).
  • An Electric Fan: Converts Electrical Energy into Kinetic Energy.

Common Conversion Types

  • Light →\rightarrow Thermal: Sunlight warming a surface.
  • Electrical →\rightarrow Mechanical: Motors powering machinery.
  • Chemical →\rightarrow Electrical: Batteries powering devices.
  • Thermal →\rightarrow Mechanical: Steam turbines generating power.

Units of Energy

Different industries use different units to measure energy. Below are the most common standards:

SymbolUnit NameDescription
JJouleThe standard SI unit of energy.
calCalorieOften used in chemistry and nutrition.
WhWatt-hourCommonly used for electricity consumption.
eVElectron voltUsed in atomic and particle physics.
BTUBritish Thermal UnitStandard for heating and cooling systems.
kgcekg Coal EquivalentEnergy released by burning 1 kg of coal.
kgoekg Oil EquivalentEnergy released by burning 1 kg of crude oil.
m³ GasCubic Meter GasEnergy equivalent of natural gas volume.
kpmKilopondmeterObsolete gravitational metric unit.
ergErgCGS unit equal to 10−710^{-7} joules.

Frequently Asked Questions

What is conversion of energy give two examples?

Energy can be converted from one form to another. Examples: Gasoline (chemical) is put into our cars, and with the help of electrical energy from a battery, provides mechanical (kinetic) energy. Purchased electricity is fed into our TVs and is converted to light and sound.

How do you calculate energy conversions?

To convert from J into units in the left column divide by the value in the right column or, multiply by the reciprocal, 1/x. To convert among any units in the left column, say from A to B, you can multiply by the factor for A to convert A into Joules then divide by the factor for B to convert out of Joules.

How is energy converted into temperature?

Divide the amount of heat energy provided to the substance, in joules, by the mass of the substance, in grams (g). For example, if 4,000 joules of energy were provided to 500 g of water, you would calculate 4,000/500 = 8. Divide the result of the previous calculation by the specific heat capacity of the substance.

How do you convert MMBtu to m3?

1 MMBtu = 28.263682 m3 of natural gas at defined temperature and pressure.

How do you convert AU to joules?

1 au = 4.359744E-18 J. 1 x 4.359744E-18 J = 4.359744E-18 Joules.

Is kJ smaller than J?

Thus, a kiloJoule (kJ) is 1000 Joules and a megaJoule (MJ) is 1,000,000 Joules. A related unit is the Watt, which is a unit of power (energy per unit time).

How many joules are in a mole?

Since 1 mole = 6.02214179×1023 particles (atoms, molecules, ions etc.), 1 Joule per mole is equal to 1 Joule divided by 6.02214179×1023 particles, or (6.022×10^23 particles/mole), 1.66054×10−24 Joule per particle.

How much energy is a Kilojoule?

A kilojoule is a unit of measure of energy, in the same way that kilometres measure distance. Food energy used to be measured in Calories (Cal) and some countries still use those units. The conversions are as follows: 1 kJ = 0.2 Cal.

What is the difference between kJ and J?

1 Joule (J) is equal to 0.001 kilojoule (kJ). To convert joules to kilojoules, multiply the joule value by 0.001 or divide by 1000. For example, to convert 100 J to kJ, divide 100 by 1000, that makes 0.1 kJ is 100 J.

What is a unit of energy called?

1 Joule (J) is the MKS unit of energy, equal to the force of one Newton acting through one meter. 1 kilowatt-hour is the energy of one kilowatt power flowing for one hour. (E = P t).

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