Energy Converter
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Joules
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kcal
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kWh
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BTU
How It Works
- Enter the energy value you want to convert
- Select the source unit (Joules, Calories, kWh, BTU, etc.)
- Select the target unit for conversion
- See the converted result instantly
- View quick reference showing common conversions
Frequently Asked Questions
Is the Energy Converter free?
Yes, ApexSofteck Tools's Energy Converter is completely free. Convert unlimited energy values without any registration required.
What energy units are supported?
The converter supports Joules, Kilojoules, Calories, Kilocalories (food calories), Watt-hours, Kilowatt-hours, BTU, and Electronvolts.
What's the difference between cal and kcal?
1 calorie (cal) is the energy to heat 1g of water by 1°C. 1 kilocalorie (kcal) = 1,000 cal. Food labels show kcal but often just say "Calories" (capital C).
What is a BTU?
BTU (British Thermal Unit) is commonly used for heating/cooling. 1 BTU is the energy to heat 1 pound of water by 1°F. 1 BTU ≈ 1,055 Joules.
Can I use this for electricity bills?
Yes! kWh on your electricity bill can be converted to Joules or BTU. 1 kWh = 3.6 million Joules = 3,412 BTU.