Energy Converter
Energy measures the capacity to perform work or transfer heat. Joules are the SI reference, while calories, watt-hours, BTU and foot-pounds are useful in nutrition, electricity, heating and mechanics.
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Popular Energy Conversions
Complete Energy Conversion Reference
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Choose a specific unit pair for a dedicated calculator, formula, examples, FAQs and reference table.
- Joules to Kilojoules
- Joules to Calories
- Joules to Kilocalories
- Joules to Watt-hours
- Joules to Kilowatt-hours
- Joules to British Thermal Units
- Joules to Foot-pounds
- Kilojoules to Joules
- Kilojoules to Calories
- Kilojoules to Kilocalories
- Kilojoules to Watt-hours
- Kilojoules to Kilowatt-hours
- Kilojoules to British Thermal Units
- Kilojoules to Foot-pounds
- Calories to Joules
- Calories to Kilojoules
- Calories to Kilocalories
- Calories to Watt-hours
- Calories to Kilowatt-hours
- Calories to British Thermal Units
- Calories to Foot-pounds
- Kilocalories to Joules
- Kilocalories to Kilojoules
- Kilocalories to Calories
- Kilocalories to Watt-hours
- Kilocalories to Kilowatt-hours
- Kilocalories to British Thermal Units
- Kilocalories to Foot-pounds
- Watt-hours to Joules
- Watt-hours to Kilojoules
- Watt-hours to Calories
- Watt-hours to Kilocalories
- Watt-hours to Kilowatt-hours
- Watt-hours to British Thermal Units
- Watt-hours to Foot-pounds
- Kilowatt-hours to Joules
- Kilowatt-hours to Kilojoules
- Kilowatt-hours to Calories
- Kilowatt-hours to Kilocalories
- Kilowatt-hours to Watt-hours
- Kilowatt-hours to British Thermal Units
- Kilowatt-hours to Foot-pounds
- British Thermal Units to Joules
- British Thermal Units to Kilojoules
- British Thermal Units to Calories
- British Thermal Units to Kilocalories
- British Thermal Units to Watt-hours
- British Thermal Units to Kilowatt-hours
- British Thermal Units to Foot-pounds
- Foot-pounds to Joules
- Foot-pounds to Kilojoules
- Foot-pounds to Calories
- Foot-pounds to Kilocalories
- Foot-pounds to Watt-hours
- Foot-pounds to Kilowatt-hours
- Foot-pounds to British Thermal Units