Energy and Work Measurement Converters
Energy, Work, and Heat Conversion Calculators
Convert between mechanical work, electrical power consumption over time, thermal heating units, and dietary nutrition values.
Supported Energy Units
- Mechanical & SI Units: Joules (J), Kilojoules (kJ)
- Thermal & Heating: British Thermal Units (BTU), Calories (cal), Kilocalories (kcal / nutritional Calories)
- Electrical Energy: Watt-hours (Wh), Kilowatt-hours (kWh)
Popular Energy Conversions
| Conversion Pair | Standard Ratio | Typical Application |
|---|---|---|
| Kilowatt-Hours to Joules | 1 kWh = 3,600,000 J | Utility power billing, battery capacity |
| Calories to Joules | 1 cal = 4.184 J | Thermodynamic chemistry experiments |
| BTU to Kilowatt-Hours | 1 BTU ≈ 0.000293071 kWh | Air conditioning & furnace heat ratings |
| Kilojoules to Kilocalories | 1 kJ ≈ 0.239006 kcal | Food labels, diet and exercise tracking |
Frequently Asked Questions
What is the difference between a small calorie (cal) and a food Calorie (kcal)?
One dietary Calorie (spelled with a capital C) is actually a kilocalorie (1,000 small chemistry calories or 4,184 joules).
How much energy is 1 kilowatt-hour?
One kilowatt-hour (kWh) equals exactly 3.6 megajoules (3,600,000 joules).