Utilities
Power Converter
Convert a power value between milliwatts, watts, kilowatts, megawatts, horsepower, BTU per hour, and foot-pounds per second locally in your browser.
Convert power between milliwatts, watts, kilowatts, megawatts, mechanical and metric horsepower, BTU per hour, and foot-pounds per second. Zero is a valid value.
Conversions run locally in your browser; your power value is not uploaded or stored.
Convert one power value into the units you need.
Enter a non-negative power value and choose its unit to see the equivalent milliwatts, watts, kilowatts, megawatts, mechanical horsepower, metric horsepower, BTU per hour, and foot-pounds per second. Zero is valid. It runs locally in your browser, so your value is not uploaded or stored.
Frequently Asked Questions
Everything you need to know about this tool, how it works, and privacy.
Which power units can I convert?
Enter a power value in milliwatts, watts, kilowatts, megawatts, mechanical horsepower, metric horsepower, BTU per hour, or foot-pounds per second. The converter returns the equivalent value in all eight units using 1 mechanical hp = 745.6998715822702 W, 1 metric hp = 735.49875 W, 1 BTU/h = 0.29307107 W, and 1 ft·lbf/s = 1.3558179483314004 W.
Can I convert zero or decimal power values?
Yes. Zero is a valid power value, and decimal values are accepted. Negative values are rejected because a power amount cannot be less than zero. Results show up to six decimal places when needed.
What happens with very large power values?
The converter shows an error when the entered value is too large to convert safely, instead of returning an unreliable rounded result.
Does my power value leave my browser?
No. The conversion and copy action run locally in your browser. CodeASystem does not upload or store the value you enter.