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Watt Converter
Convert a power value between watts, kilowatts, horsepower, BTU per hour, and other common power units.
What this converter does
This tool converts a power value between commonly used units: watts, kilowatts, mechanical horsepower, BTU per hour, and foot-pounds per second.
The conversions used
All conversions pass through watts as the base unit: 1 kW = 1,000 W, 1 mechanical horsepower = 745.699872 W, 1 BTU/hour = 0.29307107 W, and 1 foot-pound per second = 1.35581795 W. These are standard, internationally recognized conversion factors.
Enter your value and starting unit to instantly see it converted across all the other units.
Last reviewed August 2026