Converters
12
Guide
How to convert energy
Enter an energy amount and select the original and target units. Joules, calories, watt-hours, kilowatt-hours, and BTU are converted through joules.
Energy uses joules as the base unit: result = amount x source joule factor / target joule factor.
Examples
Energy conversion examples
Kilowatt-hours to joules
1 kWh
equals
3600000 J
Calories to joules
100 cal
equals
418.4 J
BTU to joules
1 BTU
equals
1055.05585262 J
Energy
All conversions
Joules to Kilojoules Converter
Energy
Browse supported units
J
Joule
Joule (J) is one of the supported energy units in this converter.
kJ
Kilojoule
Kilojoule (kJ) is one of the supported energy units in this converter.
cal
Calorie
Calorie (cal) is one of the supported energy units in this converter.
kcal
Kilocalorie
Kilocalorie (kcal) is one of the supported energy units in this converter.
Wh
Watt-hour
Watt-hour (Wh) is one of the supported energy units in this converter.
kWh
Kilowatt-hour
Kilowatt-hour (kWh) is one of the supported energy units in this converter.
BTU
British thermal unit
British thermal unit (BTU) is one of the supported energy units in this converter.
Popular conversions
Energy links
Conversion table
1 Kilowatt-hour equals
| Unit | Value |
|---|---|
| Joule J | 3600000 |
| Kilojoule kJ | 3600 |
| Calorie cal | 860420.650096 |
| Kilocalorie kcal | 860.420650096 |
| Watt-hour Wh | 1000 |
| British thermal unit BTU | 3412.14163313 |
Formula model
Base-unit conversion
Food calories are represented by kilocalories where appropriate; small calorie and kilocalorie units are both available.
base = amount * factor + offset
result = (base - targetOffset) / targetFactor
result = (base - targetOffset) / targetFactor
FAQ
Energy converter questions
What is a kilowatt-hour?
A kilowatt-hour is the energy used by 1,000 watts over one hour.
Are calories and kilocalories both included?
Yes. The catalog includes calorie and kilocalorie as separate units.