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Energy & Work Converter
Convert between Joules, Kilojoules, Calories, Kilocalories, Watt-hours, Kilowatt-hours, BTU, and Foot-pounds.
Popular Energy & Work Conversions
Complete Unit Reference & Conversion Ratios
Energy & Work Reference & Conversion Factors
Base reference unit: Joules (J)
| Unit Name | Symbol | Classification | Value in Joules | Description |
|---|---|---|---|---|
| Joules | J | Standard Units | 1 J = 1 J | SI unit of energy (1 N⋅m = 1 W⋅s) |
| Kilojoules | kJ | Standard Units | 1 kJ = 1,000 J | 1 kJ = 1,000 Joules |
| Megajoules | MJ | Standard Units | 1 MJ = 1,000,000 J | 1 MJ = 1,000,000 Joules |
| Gram Calories (Small cal) | cal | Standard Units | 1 cal = 4.184 J | 1 cal = 4.184 J |
| Kilocalories (Food Cal) | kcal | Standard Units | 1 kcal = 4,184 J | 1 food Calorie = 1,000 small calories |
| Watt-Hours | Wh | Standard Units | 1 Wh = 3,600 J | 1 Wh = 3,600 Joules |
| Kilowatt-Hours | kWh | Standard Units | 1 kWh = 3,600,000 J | 1 kWh = 3.6 MJ (standard electricity unit) |
| British Thermal Units (IT) | BTU | Standard Units | 1 BTU = 1,055.05585 J | 1 BTU ≈ 1,055 Joules |
| Foot-Pounds | ft⋅lb | Standard Units | 1 ft⋅lb = 1.35581795 J | 1 ft-lb ≈ 1.356 J |
| Electronvolts | eV | Standard Units | 1 eV = 1.6022e-19 J | 1 eV ≈ 1.602 × 10⁻¹⁹ J |