Watt-hour to Kilowatt-hour (Wh to kWh) Converter
1 watt-hour equals 0.001 kilowatt-hours (kWh) — divide watt-hours by 1000 (or multiply by 0.001) to convert. The prefix "kilo" simply means 1,000, so 1,000 Wh make up 1 kWh.
The formula
To convert watt-hours to kilowatt-hours, multiply by 0.001:
kWh = Wh × 0.001
For example, 10 Wh × 0.001 = 0.01 kWh. To reverse it, divide by 0.001 (or multiply by 1000).
Conversion table
| Watt-hours (Wh) | Kilowatt-hours (kWh) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 500 | 0.5 |
| 1000 | 1 |
How to convert online
- Type the number of watt-hours into the first box.
- Read the kilowatt-hour result instantly in the second box.
- Or enter a kilowatt-hour value to convert back to watt-hours.
Use the Watt-hour to Kilowatt-hour Converter — free and instant in your browser.
Where this conversion is used
Watt-hours to kilowatt-hours matters for electricity bills, solar and battery systems, and appliance ratings. Device labels often list capacity in Wh, while utilities bill in kWh, so converting lets you estimate running costs at a glance.
FAQ
How many kilowatt-hours are in a watt-hour?
One watt-hour equals 0.001 kilowatt-hours. So 100 Wh is 0.1 kWh and 1000 Wh is 1 kWh.
What is the formula to convert watt-hours to kilowatt-hours?
Multiply the watt-hour value by 0.001, or divide by 1000: kWh = Wh × 0.001.
How do I convert kilowatt-hours back to watt-hours?
Multiply by 1000. For instance, 0.5 kWh × 1000 = 500 Wh.
Is the conversion exact?
Yes. The kilo prefix is exactly 1,000, so the conversion is precise with no rounding.
Related converters
- Kilowatt-hour to Watt-hour Converter
- Watt-hour to Joule Converter
- Watt-hour to Kilojoule Converter
- Watt-hour to Kilocalorie Converter
Built by ByteVancer
ByteTools is a free product of ByteVancer, a software and web development studio. If your team needs custom tools, web apps or automation, ByteVancer can help you build them.
Recommended reading
Watt-hour to Kilojoule (Wh to kJ) Converter
1 watt-hour equals 3.6 kilojoules exactly. Use the formula, an easy factor and a reference table to convert Wh to kJ instantly and free.
Watt-hour to Kilocalorie (Wh to kcal) Converter
1 watt-hour equals 0.86042065 kilocalories. Use the exact factor, formula and a reference table to convert Wh to kcal fast and free.
Watt-hour to Joule Converter (Wh to J) + Formula
1 watt-hour equals 3,600 joules. Convert Wh to joules with the exact factor, a simple formula, and a reference table of common values.
Watt-hour to Calorie Converter (Wh to cal)
1 watt-hour equals 860.42065 calories. Convert Wh to calories with the exact factor, a clear formula, and a reference table.