Energy converter
Energy is the capacity to do work. Convert joules and kilojoules, calories and kilocalories (food calories), watt-hours and kilowatt-hours (electricity bills), British thermal units and electronvolts.
Energy units
- Joule (J) β The joule (J) is a unit of energy in the International System of Units (SI). It is the reference unit for all energy conversions on this site.
- Kilojoule (kJ) β The kilojoule (kJ) is a unit of energy in the International System of Units (SI). 1 kilojoule equals 1,000 joules. This value is exact by definition.
- Calorie (cal) β The calorie (cal) is a unit of energy. 1 calorie equals 4.184 joules. This value is exact by definition.
- Kilocalorie (kcal) β The kilocalorie (kcal) is a unit of energy. 1 kilocalorie equals 4,184 joules. This value is exact by definition.
- Watt-hour (Wh) β The watt-hour (Wh) is a metric unit of energy accepted for use with the SI. 1 watt-hour equals 3,600 joules. This value is exact by definition.
- Kilowatt-hour (kWh) β The kilowatt-hour (kWh) is a metric unit of energy accepted for use with the SI. 1 kilowatt-hour equals 3,600,000 joules. This value is exact by definition.
- BTU (BTU) β The BTU (BTU) is a unit of energy used in both the imperial and US customary systems. 1 BTU equals 1,055.055853 joules. This value is exact by definition.
- Electronvolt (eV) β The electronvolt (eV) is a unit of energy. 1 electronvolt equals 1.602177 Γ 10β»ΒΉβΉ joules. This value is exact by definition.