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watt-hours (Wh)

watt-hours as a conversion hub: 6 direct pairs, all with the exact factor on the page.

Definition1 Wh = 3.6 kJ exactly
CategoryEnergy Converter
Pairs from here6

Energy Converter

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watt-hours converted to every other unit

WhJkJcalkcalkWhBtu
1 Wh3,6003.6860.4210.860420650.0013.412142
2 Wh7,2007.21,720.841.7208410.0026.824283
5 Wh18,000184,302.14.3021030.00517.060708
10 Wh36,000368,604.218.6042070.0134.121416
20 Wh72,0007217,208.4117.2084130.0268.242833
50 Wh180,00018043,021.0343.0210330.05170.607
100 Wh360,00036086,042.0786.0420650.1341.214

All conversions starting from Wh

Wh to JWh to kJWh to calWh to kcalWh to kWhWh to Btu

Questions

How do I convert from watt-hours?
Pick the target unit from the table on this page, or open the dedicated pair page — each one carries a converter, a table of common values and the exact factor.
Is watt-hour exact or approximate?
The factor shown (1 Wh = 3.6 kJ) is fixed by definition, so conversions are exact rather than measured.
What is watt-hour used for?
watt-hours as used in practical measurements