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kWh to kJ
Convert kWh to kJ online, free and without signing up. Type a value and the result appears as you type, next to the value in every other energy unit. For example, 10 kWh = 36,000 kJ. Nothing is uploaded: the calculation runs in your browser.
How to convert kWh to kJ
- 1Type your value in the “Value” field
- 2Check the units in “From” and “To”
- 3Read the result, or press “Swap”
- The result, and the value in every unit.
What happens to your numbers
- Nothing is uploaded.The calculation runs in your browser, on your own device.
- Every unit at once.A table shows your value in all the other energy units.
- Works offline.Once the tool has been opened, it needs no connection.
What you can do
- Type any value, including decimals and negative numbers, and see the result as you type.
- See your value in every energy unit in the table below the result.
- Press “Swap” to turn the conversion around, or pick other units in “From” and “To”.
Good to know
- A kilowatt hour (kWh) is 3,600,000 joules: one kilowatt used for one hour. Electricity and gas bills are counted in kWh.
- A kilojoule (kJ) is 1,000 joules. Food labels in Europe give energy in kJ next to kcal. 1 kJ is about 0.239 kcal.
- The kilocalorie is the thermochemical one: 1 kcal is exactly 4.184 kJ. One kWh is 3,600 kJ, about 860 kcal.
- Results are shown with up to 10 significant digits. Very large or very small numbers appear in exponent form, for example 1.5e+16.
Questions
Are my values sent to a server?
No. The calculation runs in your browser, on your own device. Nothing you type is sent to us or anyone else.
How do I convert kWh to kJ?
Type your value in the “Value” field. The result appears at once, for example 10 kWh = 36,000 kJ. “Swap” turns the conversion around.
How many kilojoules are in a kilocalorie?
One kilocalorie is 4.184 kilojoules. To go from kcal to kJ, multiply by 4.184. To go back, divide by 4.184.