Energy Converter
ConvertersConvert between Joules, Calories, kWh, and BTUs.
1
Joules (J)
0.0002
kcal
0
kWh
About This Tool
Comprehensive energy unit converter. Translate between Joules, kilocalories (dietary calories), Kilowatt-hours (kWh), and British Thermal Units (BTU) for science and nutrition.
Frequently Asked Questions
The Joule (J) is the official SI unit for energy. One Joule is defined as the work done by a force of one Newton moving an object one meter.
No. Nutrition labels usually show Kilocalories (kcal), often just called "Calories" with a capital C. One kcal is equal to $1,000$ scientific calories.
One Kilowatt-hour ($1$ kWh) is exactly $3,600,000$ Joules ($3.6$ MJ). This is the amount of energy used by a $1,000$-watt appliance in one hour.
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