Convert watt-hours to kilowatt-hours
1 Wh = 0.001 kWh — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.001kWh
As a fraction: 1/1000
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1 Wh = 0.001 kWh
Show this value in all 39 energy & work units
- Petajoules PJ 3.6e-12
- Terajoules TJ 3.6e-9
- Gigajoules GJ 0.000 003 6
- Megajoules MJ 0.0036
- Kilojoules kJ 3.6
- Joules J 3600
- Millijoules mJ 3 600 000
- Microjoules µJ 3 600 000 000
- Nanojoules nJ 3 600 000 000 000
- Watt-hours Wh 1
- Kilowatt-hours kWh 0.001
- Megawatt-hours MWh 0.000 001
- Gigawatt-hours GWh 1e-9
- Terawatt-hours TWh 1e-12
- Calorie (thermochemical)s cal 860.420 650 096
- Kilocalories kcal 0.860 420 650 096
- Calorie (IT)s cal (IT) 859.845 227 859
- Kilocalorie (IT)s kcal (IT) 0.859 845 227 859
- British thermal units BTU 3.412 141 633 13
- BTU (thermochemical)s BTU (th) 3.414 425 949 64
- Million BTUs MMBTU 0.000 003 412 141 633 13
- Therm (US)s thm 0.000 034 129 563 407
- Therm (EC)s thm (EC) 0.000 034 121 411 564 9
- Electronvolts eV 2.24694326681e+22
- Kiloelectronvolts keV 2.24694326681e+19
- Megaelectronvolts MeV 2.24694326681e+16
- Gigaelectronvolts GeV 22 469 432 668 100
- Teraelectronvolts TeV 22 469 432 668.1
- Ergs erg 36 000 000 000
- Foot-pounds ft·lbf 2655.223 737 4
- Inch-pounds in·lbf 31 862.684 848 8
- Foot-poundals ft·pdl 85 429.297 455 2
- Horsepower-hours hp·h 0.001 341 022 089 6
- Tonne of TNTs t TNT 0.000 000 860 420 650 096
- Kiloton of TNTs kt TNT 8.60420650096e-10
- Megaton of TNTs Mt TNT 8.60420650096e-13
- Hartrees Eₕ 8.25736420223e+20
- Rydbergs Ry 1.65147284045e+21
- Quads quad 3.41214163313e-15
Every row is Watt-hour (Wh) converted through the joule, in exact rational arithmetic.
How to convert watt-hours to kilowatt-hours
Multiply the number of watt-hours by 0.001 to get kilowatt-hours.
The exact factor is 0.001 — as a fraction, 1/1000.
Kilowatt-hour: How electricity is billed everywhere.
Watt-hour to Kilowatt-hour conversion table
| Watt-hours (Wh) | Kilowatt-hours (kWh) |
|---|---|
| 1 Wh | 0.001 |
| 2 Wh | 0.002 |
| 3 Wh | 0.003 |
| 5 Wh | 0.005 |
| 10 Wh | 0.01 |
| 20 Wh | 0.02 |
| 25 Wh | 0.025 |
| 50 Wh | 0.05 |
| 100 Wh | 0.1 |
| 250 Wh | 0.25 |
| 500 Wh | 0.5 |
| 1000 Wh | 1 |
Kilowatt-hour to Watt-hour conversion table
| Kilowatt-hours (kWh) | Watt-hours (Wh) |
|---|---|
| 1 kWh | 1000 |
| 2 kWh | 2000 |
| 3 kWh | 3000 |
| 5 kWh | 5000 |
| 10 kWh | 10 000 |
| 20 kWh | 20 000 |
| 25 kWh | 25 000 |
| 50 kWh | 50 000 |
| 100 kWh | 100 000 |
| 250 kWh | 250 000 |
| 500 kWh | 500 000 |
| 1000 kWh | 1 000 000 |
Frequently asked
How many kilowatt-hours are in a watt-hour?
One watt-hour equals 0.001 kilowatt-hours (Wh → kWh). That figure is exact, not rounded.
How do you convert watt-hours to kilowatt-hours?
Multiply the number of watt-hours by 0.001 to get kilowatt-hours.
What is 1 kWh in watt-hours?
One kilowatt-hour is 1000 watt-hours.
What is 10 Wh in kWh?
10 Wh = 0.01 kWh.
What exactly is a kilowatt-hour?
How electricity is billed everywhere.