Joule Converter Calculator
Convert joules (J) to other energy units instantly with our free calculator.
Kilojoules (kJ)
1
Calories (cal)
239.006
Kilocalories (kcal)
0.239
Watt Hours (Wh)
0.278
Understanding Joules and Energy Conversion
What is a Joule?
A joule (J) is the SI unit of energy, equal to the energy transferred when applying a force of one newton through a distance of one meter. It's named after English physicist James Prescott Joule.
Common Uses
Joules are used to measure:
- Electrical energy consumption
- Food energy content
- Mechanical work
- Heat energy transfer
Quick Facts
- 1 joule = 0.239 calories
- 1 kilocalorie = 4,184 joules
- 1 watt-hour = 3,600 joules
- 1 kilojoule = 1,000 joules