Watt-hours to Kilowatt-hours Converter
1 watt-hour = 0.001 kilowatt-hours
1 watt-hour equals 0.001 kilowatt-hours
How to convert watt-hours to kilowatt-hours
Calories here are thermochemical (4.184 J), while BTU uses the International Table definition. A kilowatt-hour is energy (3.6 MJ), not power; a food Calorie is a kilocalorie.
kWh = Wh × 0.001One watt-hour is 0.001 kilowatt-hours, so a single multiplication converts any value.
0.01 kWh = 10 × 0.001Watt-hours to kilowatt-hours conversion table
Common values in watt-hours, converted to kilowatt-hours.
| Watt-hours (Wh) | Kilowatt-hours (kWh) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1,000 | 1 |
About these units
watt-hourWh
One watt sustained for one hour: exactly 3,600 joules.
kilowatt-hourkWh
One kilowatt sustained for one hour: exactly 3.6 megajoules. The billing unit for electricity.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.