Energy Converter
Convert energy and work: Joules, Kilojoules, Calories, food kcal, Kilowatt-hours (kWh), and BTUs.
500 Kilojoule (kJ) in All Energy & Work Units
Conversion Formula & Standards
Conversions follow International System of Units (SI) and ISO standard constants.
How to Use Energy Converter
Input energy quantity.
Select unit (e.g., kWh for home utility electric bills or kcal for nutrition).
Instantly calculate equivalents across thermodynamic and electrical scales.
Frequently Asked Questions
What is the difference between a small calorie and a dietary Calorie?
1 dietary Calorie (food calorie, kcal) equals 1,000 small gram calories (cal) or exactly 4,184 Joules.
How many Joules are in 1 Kilowatt-hour (kWh)?
1 kWh equals exactly 3,600,000 Joules (3.6 Megajoules).
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