Energy Converter
Convert between the energy units used in physics, nutrition, and utility billing.
- kilojoule0.001000
- kilocalorie0.0002390
- kilowatt-hour2.778e-7
- BTU0.0009478
How it works
1 kcal = 4184 J. 1 kWh = 3.6 MJ. 1 BTU ≈ 1055 J.
A 500 kcal meal ≈ 2.09 MJ ≈ 0.58 kWh.
Frequently asked questions
- Food calorie vs calorie?
- A food 'Calorie' is 1 kilocalorie (kcal).
- kWh in billing?
- Electricity is billed in kilowatt-hours — energy, not power.
- BTU in HVAC?
- Air-conditioner capacity is often rated in BTU/hr.
- Electron-volt?
- 1 eV = 1.602e-19 J — used in particle physics.
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