Power Converter

Convert power (rate of energy transfer) between watts, kilowatts, megawatts, mechanical horsepower, BTU/h, and related rates.

What is the base unit?

Conversions are relative to the watt (W), the SI unit of power (1 joule per second). J/s is treated as identical to 1 W.

Which horsepower definition is used?

Mechanical horsepower is scaled at about 745.7 W (33,000 ft·lbf/min). Metric horsepower and electrical horsepower can differ slightly elsewhere.

Is BTU/h energy or power?

BTU/h is a power (rate) unit used heavily in HVAC. Total heat energy would be BTU without the “per hour.”