Handy Units
Energy Converter
Joules, calories, kilocalories, kWh, BTU and electronvolts, for food energy and power bills.
Common energy conversions
All energy units
| Unit | Symbol | Relation |
|---|---|---|
| Joule | J | — |
| Kilojoule | kJ | 1 kJ = 1000 J |
| Calorie | cal | 1 cal = 4.184 J |
| Kilocalorie | kcal | 1 kcal = 4184 J |
| Watt-hour | Wh | 1 Wh = 3600 J |
| Kilowatt-hour | kWh | 1 kWh = 3600000 J |
| British thermal unit | BTU | 1 BTU ≈ 1055.06 J |
| Electronvolt | eV | 1 eV ≈ 1.60218 × 10⁻¹⁹ J |