Convert Kilowatt-hours to Watt-hours
Convert Kilowatt-hours to Watt-hours instantly. 1 Kilowatt-hour (kWh) equals 1,000 Watt-hours (Wh).
Kilowatt-hours to Watt-hours conversion table
| Kilowatt-hours (kWh) | Watt-hours (Wh) |
|---|---|
| 1 kWh | 1,000 Wh |
| 2 kWh | 2,000 Wh |
| 3 kWh | 3,000 Wh |
| 5 kWh | 5,000 Wh |
| 10 kWh | 10,000 Wh |
| 20 kWh | 20,000 Wh |
| 50 kWh | 50,000 Wh |
| 100 kWh | 100,000 Wh |
| 500 kWh | 500,000 Wh |
| 1,000 kWh | 1,000,000 Wh |
1 Kilowatt-hour = 1,000 Watt-hours · multiply Kilowatt-hours by 1,000
About converting Kilowatt-hours to Watt-hours
Kilowatt-hours (kWh) and Watt-hours (Wh) are both units of energy, so converting between them is a single multiplication: multiply your Kilowatt-hours figure by 1,000. Ten Kilowatt-hours comes to 10,000 Watt-hours, and a hundred works out at 100,000 Watt-hours.
Rule of thumb: going from Kilowatt-hours to Watt-hours multiplies, so the figure always grows — one Kilowatt-hour is already 1,000 Watt-hours. 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 Watt-hour?
A watt-hour is energy, not power, and that distinction trips people up constantly. A watt is a rate — energy per second — so a watt-hour is what you get by sustaining that rate for an hour: a quantity of energy expressed as "this much power for this long". It is the natural unit for anything that stores energy and releases it gradually, which is why phone and laptop batteries are rated in watt-hours rather than the milliamp-hours stamped on the cell, and why airlines police lithium batteries by their watt-hour rating. Capacity in watt-hours tells you how long a load can run; watts alone never can.
To put both in perspective: an electric car covers roughly five kilometres on a kilowatt-hour, while a phone battery holds somewhere around 15 watt-hours.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Watt-hours to Kilowatt-hours converter, or browse all Energy converters.
Frequently asked questions
How many Watt-hours are in one Kilowatt-hour?
There are 1,000 Watt-hours in one Kilowatt-hour.
How do I convert Kilowatt-hours to Watt-hours?
Multiply the number of Kilowatt-hours by 1,000. For example, 10 Kilowatt-hours = 10,000 Watt-hours.
What is 100 Kilowatt-hours in Watt-hours?
100 Kilowatt-hours is equal to 100,000 Watt-hours.
How do I convert Watt-hours to Kilowatt-hours?
Multiply the Watt-hours value by 0.001 (or divide by 1,000).
Is this Kilowatt-hours to Watt-hours conversion exact?
Yes, exactly. Both units are fixed against the same base by definition, and 1 Kilowatt-hour = 1,000 Watt-hours 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 Watt-hour?
A watt-hour is energy, not power, and that distinction trips people up constantly. A watt is a rate — energy per second — so a watt-hour is what you get by sustaining that rate for an hour: a quantity of energy expressed as "this much power for this long". It is the natural unit for anything that stores energy and releases it gradually, which is why phone and laptop batteries are rated in watt-hours rather than the milliamp-hours stamped on the cell, and why airlines police lithium batteries by their watt-hour rating. Capacity in watt-hours tells you how long a load can run; watts alone never can.