About Energy Converter
This converter tool allows you to convert between different energy units used in physics, chemistry, engineering, and nutrition.
Common Energy Conversions
| From |
To |
Conversion Factor |
| 1 joule (J) |
0.239006 calories (cal) |
Multiply by 0.239006 |
| 1 British thermal unit (BTU) |
1055.06 joules |
Multiply by 1055.06 |
| 1 kilowatt-hour (kWh) |
3.6 × 10⁶ joules |
Multiply by 3600000 |
| 1 calorie (cal) |
4.184 joules |
Multiply by 4.184 |
| 1 electron-volt (eV) |
1.60218 × 10⁻¹⁹ joules |
Multiply by 1.60218e-19 |
| 1 erg |
1 × 10⁻⁷ joules |
Multiply by 1e-7 |
Did You Know?
- The joule (J) is the SI unit of energy, named after English physicist James Prescott Joule.
- One calorie is the amount of energy needed to raise the temperature of 1 gram of water by 1°C.
- The average lightning bolt contains about 1 billion joules of energy (about 278 kWh).
- One ton of TNT equivalent is defined as 4.184 gigajoules.
- The electron-volt (eV) is commonly used in atomic and particle physics.