Energy Converter
Convert between common energy units used in physics, engineering, and nutrition.
Enter energy value and choose units. Press Ctrl/Cmd + Enter.
Result will appear here.
| Unit | Equivalent |
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Privacy: runs locally in your browser. No inputs are stored or transmitted.
How it works
Converts using joules (J) as a base unit.
1 cal = 4.184 J
1 kWh = 3,600,000 J
1 BTU ≈ 1055.06 J
Examples
- 1000 J ≈ 239.006 cal
- 1 kWh = 3,600,000 J
- 1 BTU ≈ 1055.06 J
FAQ
- How do you convert joules to calories?
Divide joules by 4.184 to get calories.
- How many joules are in 1 kilowatt-hour?
1 kWh equals 3,600,000 joules.
- What is BTU?
BTU stands for British Thermal Unit, a unit commonly used for heating and cooling energy.
- Are my inputs stored?
No. All calculations run locally in your browser.