Direct conversion
Convert kilowatt-hour [kWh] to watt-hour [Wh] instantly with formula, examples, chart, and FAQs.
Quick answer
Use the calculator below for any custom value, then check the formula, examples, chart, and reverse conversion links.
1 kilowatt-hour [kWh] = 1000 watt-hour [Wh]
1 kilowatt-hour [kWh] = 1000 watt-hour [Wh]
Example: 1 kilowatt-hour [kWh] equals 1000 watt-hour [Wh].
Energy conversions use joule as the reference unit, including electrical, thermal, nutrition, and mechanical energy units.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
The kilowatt-hour is an energy unit equal to the energy used by one kilowatt of power for one hour.
HistoryKilowatt-hours became common through electric utility metering and billing.
Current useKilowatt-hours are used for electricity bills, batteries, appliances, solar systems, and energy planning.
The watt-hour (Wh) is a energy unit used to express measurements in this converter.
HistoryThis unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current useUse watt-hour when comparing energy values, checking specifications, converting between systems, or preparing quick estimates.
| kilowatt-hour [kWh] | watt-hour [Wh] |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 1000 | 1000000 |
Use this formula: 1 kilowatt-hour [kWh] = 1000 watt-hour [Wh] Enter your value in the calculator and the result updates instantly.
1 kilowatt-hour [kWh] equals 1000 watt-hour [Wh].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.