Convert joules to watt-hours
Instantly convert joules to watt-hours using our free online calculator. See the formula and a full reference table below.
watt-hours
1 joule = 2.7778e-4 watt-hours
Formula:
joules × 2.7778e-4 = watt-hoursJoule → Watt-hour reference table
| joules | watt-hours |
|---|---|
| 1 joule | 2.7778e-4 watt-hours |
| 2 joules | 5.5556e-4 watt-hours |
| 5 joules | 1.3889e-3 watt-hours |
| 10 joules | 2.7778e-3 watt-hours |
| 25 joules | 6.9445e-3 watt-hours |
| 50 joules | 0.0139 watt-hours |
| 100 joules | 0.0278 watt-hours |
| 250 joules | 0.0694 watt-hours |
| 500 joules | 0.1389 watt-hours |
| 1000 joules | 0.2778 watt-hours |
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Frequently asked questions
How many watt-hours are in 1 joule?
1 joule equals 2.7778e-4 watt-hours.
What is the formula to convert joules to watt-hours?
Multiply the number of joules by 2.7778e-4 to get the equivalent in watt-hours.
Is this converter accurate?
Yes. All conversions use internationally recognized conversion factors with up to 6 decimal places of precision.