Energy Converter
Popular Energy Conversions
- joules to calories
- calories to joules
- kwh to joules
- btu to joules
- foot-pound to joule
- kilocalorie to joule
Complete List of Energy Units
All available energy units for conversion:
- joule [J]
- 1 kilojoule [kJ] = 1000 joule [J]
- 1 megajoule [MJ] = 1000000 joule [J]
- 1 calorie [cal] = 4.184 joule [J]
- 1 kilocalorie [kcal] = 4184 joule [J]
- 1 British thermal unit [BTU] = 1055.05585262 joule [J]
- 1 foot-pound [ft⋅lbf] = 1.35581795 joule [J]
- 1 kilowatt hour [kWh] = 3600000 joule [J]
- 1 watt hour [Wh] = 3600 joule [J]
- 1 joule [J] = 6.24150907446E18 electronvolt [eV]
- 1 therm (US) [thm] = 105505585.262 joule [J]
Energy and Work Conversions
Energy conversion spans multiple fields from nutrition to engineering. Our converter handles mechanical, thermal, electrical, and chemical energy units.
Energy Forms
Joule (J) is the SI unit for all energy forms. Calories measure thermal energy, BTU for heating/cooling, kWh for electrical energy consumption.
Nutritional vs. Scientific
Food calories are actually kilocalories (kcal). 1 food calorie = 1000 scientific calories = 4184 joules.
Power vs. Energy
Energy is total work done (joules), power is energy per time (watts). 1 kWh = 3.6 million joules of energy consumed over time.
Renewable Energy
Solar, wind, and battery systems measure energy in kWh or MWh. Energy density matters for storage and transportation applications.
Common Applications
Nutrition and diet planning, heating and cooling systems, electrical billing, mechanical engineering, renewable energy systems, and battery technology.
Conversion Tips
1 kWh ≈ 3600 kJ. Food: 1 calorie = 4.184 J. For heating: 1 BTU ≈ 1055 J. Walking 1 mile burns ~100 food calories.