The kilowatt-hour
The kilowatt-hour (kWh) equals exactly 3,600,000 joules — the unit on every household electricity bill. One kWh runs a 1,000 W appliance for one hour.
Kilowatt-hours to Watt-hours Converter
1 kWh = 1000 Wh
1 kilowatt-hour equals 1000 watt-hours. To convert kilowatt-hours to watt-hours, multiply the kilowatt-hour value by 1000. For quick reference: 1 kWh = 1000 Wh, 5 kWh = 5000 Wh, 10 kWh = 10000 Wh, 100 kWh = 100000 Wh.
Formula
Watt-hours = Kilowatt-hours × 1000Quick
How to convert kilowatt-hours to watt-hours
Take your value
Start with your value in kilowatt-hours.
Multiply by 1000
Multiply the kilowatt-hour value by 1000. This is the exact conversion factor from kilowatt-hours to watt-hours.
Read the result
The product is your value in watt-hours. For example, 5 kWh × 1000 = 5000 Wh.
Conversion formula
The exact factor from kilowatt-hours to watt-hours is 1000.
Watt-hours = Kilowatt-hours × 1000
Kilowatt-hours to Watt-hours conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Kilowatt-hours (kWh) | Watt-hours (Wh) |
|---|---|
| 0.001 kWh | 1 Wh |
| 0.01 kWh | 10 Wh |
| 0.1 kWh | 100 Wh |
| 0.5 kWh | 500 Wh |
| 1 kWh | 1000 Wh |
| 1.5 kWh | 1500 Wh |
| 2 kWh | 2000 Wh |
| 5 kWh | 5000 Wh |
| 10 kWh | 10000 Wh |
| 20 kWh | 20000 Wh |
| 50 kWh | 50000 Wh |
| 100 kWh | 100000 Wh |
| 200 kWh | 200000 Wh |
| 250 kWh | 250000 Wh |
| 500 kWh | 500000 Wh |
| 1000 kWh | 1000000 Wh |
| 2000 kWh | 2000000 Wh |
| 2500 kWh | 2500000 Wh |
| 3600 kWh | 3600000 Wh |
| 5000 kWh | 5000000 Wh |
| 7500 kWh | 7500000 Wh |
| 10000 kWh | 10000000 Wh |
| 25000 kWh | 25000000 Wh |
| 50000 kWh | 50000000 Wh |
| 100000 kWh | 100000000 Wh |
| 250000 kWh | 250000000 Wh |
| 500000 kWh | 500000000 Wh |
| 1000000 kWh | 1000000000 Wh |
| 2000000 kWh | 2000000000 Wh |
| 3600000 kWh | 3600000000 Wh |
| 5000000 kWh | 5000000000 Wh |
| 10000000 kWh | 10000000000 Wh |
| 25000000 kWh | 25000000000 Wh |
| 50000000 kWh | 50000000000 Wh |
| 100000000 kWh | 100000000000 Wh |
| 250000000 kWh | 250000000000 Wh |
| 500000000 kWh | 500000000000 Wh |
| 1000000000 kWh | 1000000000000 Wh |
| 2000000000 kWh | 2000000000000 Wh |
| 5000000000 kWh | 5000000000000 Wh |
| 10000000000 kWh | 10000000000000 Wh |
| 20000000000 kWh | 20000000000000 Wh |
| 50000000000 kWh | 50000000000000 Wh |
| 100000000000 kWh | 100000000000000 Wh |
| 1000000000000 kWh | 1.0000 × 10^15 Wh |
| 10000000000000 kWh | 1.0000 × 10^16 Wh |
| 100000000000000 kWh | 1.0000 × 10^17 Wh |
| 1000000000000000 kWh | 1.0000 × 10^18 Wh |
| 10000000000000000 kWh | 1.0000 × 10^19 Wh |
| 100000000000000000 kWh | 1.0000 × 10^20 Wh |
Real-world reference
A US household uses about 30 kWh of electricity per day. A modern electric vehicle has a 50–100 kWh battery. In watt-hours, that gives you: 1 kWh = 1000 Wh, 10 kWh = 10000 Wh, 100 kWh = 100000 Wh.
Frequently asked questions
- How many watt-hours are in 1 kilowatt-hour?
- 1 kilowatt-hour equals 1000 watt-hours.
- How do I convert kilowatt-hours to watt-hours?
- Multiply the kilowatt-hour value by 1000. So x kWh × 1000 = the equivalent in Wh.
- What is 5 kilowatt-hours in watt-hours?
- 5 kilowatt-hours equals 5000 watt-hours.
- What is 10 kilowatt-hours in watt-hours?
- 10 kilowatt-hours equals 10000 watt-hours.
- What is 100 kilowatt-hours in watt-hours?
- 100 kilowatt-hours equals 100000 watt-hours.
- How do I convert back from watt-hours to kilowatt-hours?
- Multiply the watt-hour value by 0.001. For example, 1 Wh = 0.001 kWh.
- Is the kilowatt-hour bigger than the watt-hour?
- Yes. 1 kilowatt-hour is larger than 1 watt-hour — specifically 1000 times larger.
- Are these conversion factors exact?
- Yes. The factor of 1000 is derived directly from the SI definitions of kilowatt-hour and watt-hour.
About the kilowatt-hour and the watt-hour
The watt-hour
The watt-hour (Wh) equals 3,600 joules — the energy delivered by one watt of power over one hour. It is the natural unit for batteries, small electronics, and short-duration electrical loads.