Energy
Energy converter: J, kJ, calories, kilocalories, kWh and electronvolts. Conversion with a solution and a table.
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Enter a whole number, a decimal (2.5), a fraction (1/3) or scientific notation (6.02e23).
The energy converter converts joules, calories, kilowatt-hours and electronvolts. It uses the international calorie: 1 cal = 4.1868 J. Chemistry problems sometimes use the thermochemical calorie, 1 cal = 4.184 J.
Units
| Unit | In the base unit (J) |
|---|---|
| joule (J) | 1 |
| kilojoule (kJ) | 1000 |
| megajoule (MJ) | 1000000 |
| calorie (cal) | 4.1868 |
| kilocalorie (kcal) | 4186.8 |
| watt-hour (Wh) | 3600 |
| kilowatt-hour (kWh) | 3600000 |
| electronvolt (eV) | 1.602176634·10⁻¹⁹ |
| megaelectronvolt (MeV) | 1.602176634·10⁻¹³ |
| erg (erg) | 10⁻⁷ |
Example. 2 kWh = 2 · 3,600,000 = 7,200,000 J = 7.2 MJ.
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