Energy Unit Converter
Convert Between Energy Units
About Energy Units
Energy represents the capacity to do work or produce heat. This converter instantly converts between various energy units used in physics, engineering, and everyday applications.
- Joule (J) — SI unit of energy.
- Calorie (cal) — Commonly used in nutrition; 1 cal = 4.184 J.
- Watt Hour (Wh) — Used for electrical energy; 1 Wh = 3600 J.
- BTU — British thermal unit; 1 BTU $\approx$ 1055.06 J.
- Electronvolt (eV) — Energy of a single electron moving through 1 volt; 1 eV $\approx$ 1.602$\times$10$^{-19}$ J.
Common Energy Conversion Reference
| From | Equivalent In Joules (J) |
|---|---|
| 1 Kilojoule (kJ) | 1,000 J |
| 1 Gram Calorie (cal) | 4.184 J |
| 1 Kilocalorie (kcal) | 4,184 J |
| 1 Watt Hour (Wh) | 3,600 J |
| 1 Kilowatt Hour (kWh) | 3.6 $\times$ 10$^6$ J |
| 1 Electronvolt (eV) | 1.602 $\times$ 10$^{-19}$ J |
| 1 British Thermal Unit (BTU) | 1,055.06 J |
| 1 US Therm | 1.055 $\times$ 10$^8$ J |
| 1 Foot-pound (ft·lb) | 1.35582 J |