Energy Converter
Instantly convert energy between joules, kilojoules, kWh, calories, BTUs, therms, electronvolts and more.
Energy Converter
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SI
- Microjoule (µJ)
- 3.6e12
- Millijoule (mJ)
- 3,600,000,000
- Joule (J)
- 3,600,000
- Kilojoule (kJ)
- 3,600
- Megajoule (MJ)
- 3.6
- Gigajoule (GJ)
- 0.0036
1 J = 1 N·m = 1 W·s in the context of energy and work
Electrical energy
- Milliwatt-hour (mWh)
- 1,000,000
- Watt-hour (Wh)
- 1,000
- Kilowatt-hour (kWh)Input
- 1
- Megawatt-hour (MWh)
- 0.001
1 mWh = 3.6 J
1 Wh = 3,600 J
1 kWh = 3,600,000 J = 3.6 MJ
1 MWh = 3.6 GJ
Calories and food energy
- Thermochemical Calorie (cal(th))
- 860,421
- Thermochemical Kilocalorie (kcal(th))
- 860.421
- International Table Calorie (cal(IT))
- 859,845
- Food Kilocalorie (kcal(IT))
- 859.845
Thermochemical calorie: 1 cal(th) = 4.184 J
1 kcal(th) = 1000 cal(th) = 4184 J
International Table calorie: 1 cal(IT) = 4.1868 J
Food labels using 1 Cal correspond here to 1 kcal(IT) = 4186.8 J
BTU and therm
- British Thermal Unit (International Table) (BTU(IT))
- 3,412.14
- Thermochemical British Thermal Unit (BTU(th))
- 3,414.43
- US Therm (therm(US))
- 0.0341214
British thermal unit, International Table: 1 BTU(IT) = 1055.05585262 J
Thermochemical British thermal unit: 1 BTU(th) = 1054.35026444 J
1 therm(US) = 100,000 BTU(IT)
Mechanical and CGS units
- Erg (erg)
- 3.6e13
- Foot-pound Force (ft·lbf)
- 2,655,220
- Inch-pound Force (in·lbf)
- 31,862,700
1 erg = 10^-7 J
Derived from the international pound, foot, and g₀
1 in·lbf = 1/12 ft·lbf
Particle energy
- Electronvolt (eV)
- 2.24694e25
- Kiloelectronvolt (keV)
- 2.24694e22
- Megaelectronvolt (MeV)
- 2.24694e19
- Gigaelectronvolt (GeV)
- 2.24694e16
1 eV = 1.602176634 × 10^-19 J
1 keV = 1000 eV
1 MeV = 10^6 eV
1 GeV = 10^9 eV
Energy equivalents
- Ton of TNT Equivalent (t TNT)
- 0.000860421
- Tonne of Oil Equivalent (toe)
- 0.0000859845
Conventional TNT equivalent: 1 t TNT = 4.184 GJ
Conventional oil equivalent: 1 toe = 41.868 GJ