watts (W)

watts as a conversion hub: 5 direct pairs, all with the exact factor on the page.

DefinitionReference unit for power — every other factor in this category is expressed against it

CategoryPower Converter

Pairs from here5

Power Converter

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watts converted to every other unit

W	kW	MW	hp	PS	BTU/h
1 W	0.001	0.000001	0.0013410221	0.0013596216	3.412142
2 W	0.002	0.000002	0.0026820442	0.0027192432	6.824283
5 W	0.005	0.000005	0.0067051104	0.0067981081	17.060708
10 W	0.01	0.00001	0.01341022	0.01359622	34.121416
20 W	0.02	0.00002	0.02682044	0.02719243	68.242833
50 W	0.05	0.00005	0.0670511	0.06798108	170.607
100 W	0.1	0.0001	0.13410221	0.13596216	341.214

All conversions starting from W

W to kW W to MW W to hp W to PS W to BTU/h

Questions

How do I convert from watts?

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 exact or approximate?

The factor shown (1 W = 1 W) is fixed by definition, so conversions are exact rather than measured.

What is watt used for?

watts as used in practical measurements