Convert Kilowatt-hours to Kilojoules
Convert Kilowatt-hours to Kilojoules instantly. 1 Kilowatt-hour (kWh) equals 3,600 Kilojoules (kJ).
Kilowatt-hours to Kilojoules conversion table
| Kilowatt-hours (kWh) | Kilojoules (kJ) |
|---|---|
| 1 kWh | 3,600 kJ |
| 2 kWh | 7,200 kJ |
| 3 kWh | 10,800 kJ |
| 5 kWh | 18,000 kJ |
| 10 kWh | 36,000 kJ |
| 20 kWh | 72,000 kJ |
| 50 kWh | 180,000 kJ |
| 100 kWh | 360,000 kJ |
| 500 kWh | 1,800,000 kJ |
| 1,000 kWh | 3,600,000 kJ |
1 Kilowatt-hour = 3,600 Kilojoules · multiply Kilowatt-hours by 3,600
About converting Kilowatt-hours to Kilojoules
Kilowatt-hours (kWh) and Kilojoules (kJ) are both units of energy, so converting between them is a single multiplication: multiply your Kilowatt-hours figure by 3,600. Ten Kilowatt-hours comes to 36,000 Kilojoules, and a hundred works out at 360,000 Kilojoules.
Rule of thumb: going from Kilowatt-hours to Kilojoules multiplies, so the figure always grows — one Kilowatt-hour is already 3,600 Kilojoules. If your answer came out smaller, you have the conversion the wrong way round.
What is a Kilowatt-hour?
The kilowatt-hour is the unit your electricity bill is charged in, and almost the only energy unit most people meet by name. It is energy, not power: a kilowatt is a rate of use, a kilowatt-hour is the amount consumed by running at that rate for an hour. Utilities bill in kWh because that is what they actually deliver — a meter counts accumulated energy, not instantaneous demand. It is also the unit that sizes batteries. An EV pack and a home storage unit are both quoted in kilowatt-hours, so the figure tells you how much range or backup you have bought, while the kilowatt rating only says how fast it can be delivered.
What is a Kilojoule?
A kilojoule is a thousand joules, the size at which the joule becomes practical for everyday quantities. In Australia and New Zealand it is the primary unit on nutrition labels — food energy is quoted in kilojoules first, with calories relegated to a secondary figure or dropped entirely — so shoppers there think about daily intake in thousands of kilojoules rather than thousands of calories. It is also the working unit of chemistry, where reaction and bond energies are tabulated per mole. European labels print both kJ and kcal, which is why the same packet carries two different numbers for the same food.
To put both in perspective: an electric car covers roughly five kilometres on a kilowatt-hour, while a slice of bread carries roughly 300 kilojoules.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Kilojoules to Kilowatt-hours converter, or browse all Energy converters.
Frequently asked questions
How many Kilojoules are in one Kilowatt-hour?
There are 3,600 Kilojoules in one Kilowatt-hour.
How do I convert Kilowatt-hours to Kilojoules?
Multiply the number of Kilowatt-hours by 3,600. For example, 10 Kilowatt-hours = 36,000 Kilojoules.
What is 100 Kilowatt-hours in Kilojoules?
100 Kilowatt-hours is equal to 360,000 Kilojoules.
How do I convert Kilojoules to Kilowatt-hours?
Multiply the Kilojoules value by 0.0002778 (or divide by 3,600).
Is this Kilowatt-hours to Kilojoules conversion exact?
Yes, exactly. Both units are fixed against the same base by definition, and 1 Kilowatt-hour = 3,600 Kilojoules is the complete value — nothing is rounded away.
What is a Kilowatt-hour?
The kilowatt-hour is the unit your electricity bill is charged in, and almost the only energy unit most people meet by name. It is energy, not power: a kilowatt is a rate of use, a kilowatt-hour is the amount consumed by running at that rate for an hour. Utilities bill in kWh because that is what they actually deliver — a meter counts accumulated energy, not instantaneous demand. It is also the unit that sizes batteries. An EV pack and a home storage unit are both quoted in kilowatt-hours, so the figure tells you how much range or backup you have bought, while the kilowatt rating only says how fast it can be delivered.
What is a Kilojoule?
A kilojoule is a thousand joules, the size at which the joule becomes practical for everyday quantities. In Australia and New Zealand it is the primary unit on nutrition labels — food energy is quoted in kilojoules first, with calories relegated to a secondary figure or dropped entirely — so shoppers there think about daily intake in thousands of kilojoules rather than thousands of calories. It is also the working unit of chemistry, where reaction and bond energies are tabulated per mole. European labels print both kJ and kcal, which is why the same packet carries two different numbers for the same food.