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Convert energy between joules, kilocalories, kWh, BTU, and more.
All Conversions
Energy Conversion:
Target = Input x (Source Joule Factor / Target Joule Factor)
The joule (J) is the SI base unit of energy. All conversions use joules as an intermediate.
A small calorie (cal) is the energy to heat 1g of water by 1C. A food Calorie (Cal or kcal) = 1,000 small calories. Food labels use kcal.
1 BTU = 0.000293071 kWh. Conversely, 1 kWh = 3,412.14 BTU.
A joule is the work done by a force of 1 newton acting through a distance of 1 meter, or the energy dissipated by 1 watt over 1 second.
kWh is a practical unit for household energy. 1 kWh = 1,000 watts consumed for 1 hour. A typical US home uses about 900 kWh per month.
An electronvolt (eV) is the energy gained by an electron moving through 1 volt of electric potential. It equals 1.602 x 10^-19 joules and is used in particle physics.