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Science
Energy Conversion Table
Values shown for 1 Joule
About Energy Conversions
Energy conversions bridge multiple scientific and practical domains. The joule (SI unit) connects to calories in nutrition (1 food calorie = 4,184 joules), kilowatt-hours in electricity billing, British thermal units in HVAC engineering, and electron volts in particle physics. Understanding these relationships is crucial: your daily food intake of about 2,000 calories equals roughly 8.4 megajoules, and a typical household using 900 kWh per month consumes about 3.24 gigajoules. Our converter supports all common energy units with exact conversion factors.
| Unit Name | Symbol | Value | Formula |
|---|---|---|---|
| British Thermal Unit | BTU | 0.000947817 | multiply by 1,055.05585 |
| Calorie | cal | 0.239006 | multiply by 4.184 |
| Electron Volt | eV | 6.24151 × 10¹⁸ | multiply by 1.602176634 × 10⁻¹⁹ |
| Joule | J | 1 | base unit |
| Kilocalorie | kcal | 0.000239006 | multiply by 4,184 |
| Kilojoule | kJ | 0.001 | multiply by 1,000 |
| Kilowatt-hour | kWh | 2.77778 × 10⁻⁷ | multiply by 3,600,000 |
| Megajoule | MJ | 0.000001 | multiply by 1,000,000 |
| Watt-hour | Wh | 0.000277778 | multiply by 3,600 |