Energy Converter
Convert between different units of energy including joules, calories, BTU, kWh, and more.
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Conversion Formula
1 kWh = 3,600,000 joules
To convert from one energy unit to another, first convert to the base unit (joules), then convert to the target unit. For example, to convert BTU to joules: multiply the BTU value by 1055.06.
Frequently Asked Questions
How many joules are in a BTU?
There are approximately 1055.06 joules in 1 BTU (British Thermal Unit). This is the most commonly used conversion factor for energy calculations.
How do I convert kilocalories to kilojoules?
Multiply the kilocalorie value by 4.184. For example, 100 kcal = 100 × 4.184 = 418.4 kJ.