Free energy converter — joules, calories, kilocalories, watt-hours, kilowatt-hours, BTU, electronvolts.
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The QuickToolz Energy Converter translates between every common energy unit — joules, kilojoules, calories, kilocalories (food cal), watt-hours, kilowatt-hours, BTU, foot-pounds, and electronvolts. Useful for nutrition, electricity bills, heating, physics, and engineering.
Everything you need, nothing you don’t. Built for speed and simplicity.
Type into any energy field — every other field updates live.
Supports J, kJ, cal, kcal, Wh, kWh, BTU, ft·lb, eV.
Live updates as you type — no calculate button.
Everything you need, nothing you don’t. Built for speed and simplicity.
Enter a number in any unit — the other units update instantly.
Got questions? We’ve got answers. Common questions about Energy Converter.
Uses official SI and NIST conversion factors.
The converter is bi-directional — type into any field.
One-click copy for the unit you need.
Energy converter
Base unit: J · 11 units