Convert Watt-hour to Kilowatt-hour
Live bidirectional calculator for Watt-hours (Wh) and Kilowatt-hours (kWh) with verified formula and conversion charts.
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How the Calculation Works (Linear Scaling)
Since 1 Kilowatt-hour = 1000 Watt-hours, divide the value in Watt-hours by 1000.
Watt-hour to Kilowatt-hour Conversion Table
Precomputed values for quick reference and printing.
| Watt-hour | Kilowatt-hour |
|---|---|
| 1 Wh | 0.001 kWh |
| 2 Wh | 0.002 kWh |
| 3 Wh | 0.003 kWh |
| 4 Wh | 0.004 kWh |
| 5 Wh | 0.005 kWh |
| 6 Wh | 0.006 kWh |
| 7 Wh | 0.007 kWh |
| 8 Wh | 0.008 kWh |
| 9 Wh | 0.009 kWh |
| 10 Wh | 0.01 kWh |
| 15 Wh | 0.015 kWh |
| 20 Wh | 0.02 kWh |
| 25 Wh | 0.025 kWh |
| 30 Wh | 0.03 kWh |
| 40 Wh | 0.04 kWh |
| 50 Wh | 0.05 kWh |
| 75 Wh | 0.075 kWh |
| 100 Wh | 0.1 kWh |
| Kilowatt-hour | Watt-hour |
|---|---|
| 1 kWh | 1000 Wh |
| 2 kWh | 2000 Wh |
| 3 kWh | 3000 Wh |
| 4 kWh | 4000 Wh |
| 5 kWh | 5000 Wh |
| 6 kWh | 6000 Wh |
| 7 kWh | 7000 Wh |
| 8 kWh | 8000 Wh |
| 9 kWh | 9000 Wh |
| 10 kWh | 10000 Wh |
| 15 kWh | 15000 Wh |
| 20 kWh | 20000 Wh |
| 25 kWh | 25000 Wh |
| 30 kWh | 30000 Wh |
| 40 kWh | 40000 Wh |
| 50 kWh | 50000 Wh |
| 75 kWh | 75000 Wh |
| 100 kWh | 100000 Wh |
About Watt-hour (Wh)
The energy expended by a one-watt load operating continuously for one hour (exactly 3,600 joules).
History: Standard commercial electrical energy unit popularized with early utility grids.
Common Uses: Laptop and smartphone battery capacities, drone battery packs.
About Kilowatt-hour (kWh)
One thousand watt-hours, equal to exactly 3,600,000 joules (3.6 megajoules).
History: Primary billing unit for consumer and industrial electrical energy worldwide.
Common Uses: Home electric utility bills, electric vehicle (EV) battery packs (e.g. 75 kWh), solar panel generation.
❓ Frequently Asked Questions
How many Kilowatt-hours are in 1 Watt-hour?
There are exactly 0.001 Kilowatt-hours in 1 Watt-hour (1 Wh = 0.001 kWh).
What is the formula to convert Watt-hour to Kilowatt-hour?
The formula is: Kilowatt-hour = Watt-hour / 1000. Since 1 Kilowatt-hour = 1000 Watt-hours, divide the value in Watt-hours by 1000.
How do I convert 1 Wh to kWh manually?
To convert 1 Wh to kWh: apply the formula Kilowatt-hour = Watt-hour / 1000. Substituting gives: 1 / 1000 = 0.001 kWh.