⚡ Energy
kWh to watt-hours Converter
Convert kWh to watt-hours instantly with a reference conversion table.
Quick answer: To convert kWh to watt-hours, multiply by 1000. For example, 1 kWh = 1000 watt-hours. Use the calculator below for any value.
kWh to watt-hours
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Common conversions
| kWh | watt-hours |
|---|
Formula:
How to convert kWh to watt-hours
1
Enter your value
Type the number of kwh you want to convert into the left box. The result in watt-hours appears instantly in the right box. You can also type into the right box to convert in the other direction.
2
Use the swap button
Click the ⇄ Swap button to reverse the conversion — watt-hours to kWh. Your current value carries across so you don't have to re-enter anything.
3
About kWh and watt-hours
kWh and watt-hours are common energy measurements.
📊 Common conversions at a glance
| kWh | watt-hours |
|---|---|
| 0.001 | 1 |
| 0.01 | 10 |
| 0.1 | 100 |
| 0.25 | 250 |
| 0.5 | 500 |
| 1 | 1000 |
Reviewed for 2026. kWh ↔ watt-hours conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.
Frequently asked questions
How do I convert kWh to watt-hours?
To convert kWh to watt-hours, multiply by 1000. Or use the calculator above for instant results.
How many watt-hours are in 1 kWh?
1 kWh equals 1000 watt-hours.
Is the kWh to watt-hours converter free?
Yes, the kWh to watt-hours converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.