Conversions
Energy converter
Convert energy units with clearly labelled standards.
Find a specific conversion
Open a page with the units already selected, plus its formula and examples.
Joules to KilojoulesJoules to Watt-hoursJoules to Kilowatt-hoursJoules to Thermochemical caloriesJoules to Thermochemical kilocaloriesJoules to British thermal units (IT)
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From joules
From kilojoules
From watt-hours
From kilowatt-hours
From thermochemical calories
From thermochemical kilocalories
From british thermal units (it)
A clear answer. Here’s how.
A watt-hour is 3,600 joules. Calories use the thermochemical definition (4.184 J); BTU uses the International Table definition.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Amount to convert
- 1
- From
- Joules (J)
- To
- Kilojoules (kJ)
Example result
- Converted amount (kJ)
- 0.001
1 J = 0.001 kJ