Joules to Watt-hours Converter

Convert Joules to Watt-hours with this free calculator. Type any value to convert it instantly, or use the conversion table below for common amounts.

Joules and Watt-hours are both units used in the Energy Converter. This page converts between the two, shows the exact conversion factor and gives a table of the values people look up most often.

joules to wh conversion table

Joules	Watt-hours
1 joules	0.000278 wh
2 joules	0.000556 wh
5 joules	0.001389 wh
10 joules	0.002778 wh
25 joules	0.006944 wh
50 joules	0.013889 wh
100 joules	0.027778 wh
500 joules	0.138889 wh
1,000 joules	0.277778 wh

How it is calculated

Result = value in Joules × 0.000278
So 1 joules = 0.000278 wh.

Common joules to wh conversions

1 joules = 0.000278 wh
5 joules = 0.001389 wh
10 joules = 0.002778 wh
25 joules = 0.006944 wh
50 joules = 0.013889 wh
100 joules = 0.027778 wh

Related conversions

Other conversions from the same Energy Converter:

joules to kj joules to calories joules to kcal joules to kwh kj to joules kj to calories kj to kcal kj to wh All conversions

Frequently asked questions

How do I convert Joules to Watt-hours?

Multiply the Joules value by 0.000278. For example, 10 joules = 0.002778 wh.

What is 10 joules in wh?

10 joules equals 0.002778 wh.

Is the Joules to Watt-hours converter accurate?

Yes. The conversion uses the internationally defined conversion factor between these units, so the result is exact at the precision shown.