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Energy Converter
Joules, calories, kilowatt-hours, BTU
Energy Converter
About the energy converter
This converter handles 15 energy units. Enter a value in either field and the other updates instantly — there is no button to press and nothing to submit. Use the swap control to reverse the direction of the conversion.
All factors are stored against a single base unit
(
Joule) and applied in one step, so converting A → B
never accumulates rounding error from an intermediate hop.Quick reference table
| Joule | Calorie |
|---|---|
| 1 J | 0.2390057361 cal |
| 2 J | 0.4780114723 cal |
| 5 J | 1.195028681 cal |
| 10 J | 2.390057361 cal |
| 20 J | 4.780114723 cal |
| 50 J | 11.95028681 cal |
| 100 J | 23.90057361 cal |
| 500 J | 119.5028681 cal |
| 1000 J | 239.0057361 cal |
All 15 units
| Unit | Equals in Joule |
|---|---|
| Joule (J) | 1 |
| Kilojoule (kJ) | 1000 |
| Megajoule (MJ) | 1000000 |
| Calorie (cal) | 4.184 |
| Kilocalorie (kcal) | 4184 |
| Watt-hour (Wh) | 3600 |
| Kilowatt-hour (kWh) | 3600000 |
| Megawatt-hour (MWh) | 3600000000 |
| British thermal unit (BTU) | 1055.055853 |
| Therm (US) | 105480400 |
| Foot-pound (ft·lb) | 1.355817948 |
| Erg | 1e-07 |
| Electronvolt (eV) | 1.602177e-19 |
| Ton of oil equivalent | 4.1868e+10 |
| Ton of TNT | 4184000000 |