 ### Conversion Factors for Units of Energy

The most common energy unit is the kilowatt hour. However, different units are used in energy statistics. This overview summarises the most important units and conversion factors.

J (joule) and Ws (watt second) are the valid SI units for energy. Nevertheless, in the energy sector a lot of other units are used. This overview describes the most important units of energy and their conversion factors. A specialized calculator assists at these calculations.

Conversion factors for units of energy part 1
 kJ kcal kWh 1 kJ 1 0.2388 0.000278 1 kcal 4.1868 1 0.001163 1 kWh 3 600 860 1 1 kg SKE 29 308 7 000 8,14 1 kg oe 41 868 10 000 11,63 1 m³ natural gas 31 736 7 580 8.816
Conversion factors for units of energy part 2
 kg SKE kg RÖE m³ natural gas 1 kJ 0.000034 0.000024 0.000032 1 kcal 0.000143 0.0001 0.00013 1 kWh 0.123 0.086 0.113 1 kg SKE 1 0.7 0.923 1 kg oe 1.428 1 1.319 1 m³ natural gas 1.083 0.758 1
Units of energy overview part 1
 Unit Name J Joule cal Calorie Wh Watt hour (kg) SKE (kilogram) Coal equivalent (kg) RÖE (kilogram) Oil equivalent oe oder OE Oil equivalent m³ Erdgas cubic meter natural gas BTU British thermal unit kpm Kilogram force meter (Kilopondmeter) erg Erg eV Electron volt
Units of energy overview part 2
 Unit Conversion in kJ or kWh J 1 000 J = 1 000 Ws = 1 kJ cal 1 000 cal = 1 kcal = 4,186 kJ Wh 1 Wh = 3,6 kJ (kg) SKE 1 kg SKE = 29 308 kJ (kg) RÖE 1 kg RÖE = 41 868 kJ oe oder OE 1 (kg) oe = 41 868 kJ m³ natural gas 1 m³ Erdgas = 31 736 kJ BTU 1 BTU = 0.000293071 kWh = 1.05506 kJ kpm 1 kpm = 2.72·10-6 kWh = 0.00980665 kJ erg 1 erg = 2.78·10-14 kWh = 1·10-10 kJ eV 1 eV = 1.60217733·10-19 J = 1.60217733·10-22 kJ