Power Converter
Convert watts, kilowatts, horsepower, BTU/h and more. Type in any unit; all others update instantly.
Select Your Unit
About This Converter
This power converter supports 10 units spanning metric, imperial, and specialty systems. Every calculation passes through a watt base, so results are precise whether you are comparing engine output in horsepower, sizing HVAC equipment in BTU/h or tons of refrigeration, or converting between metric and mechanical horsepower. It is a handy tool for engineers, electricians, automotive enthusiasts, and students.
FAQ
What is the difference between hp and PS?
Mechanical horsepower (hp) equals 745.7 W and originates from the imperial system. Metric horsepower (PS) equals 735.5 W and is used in most European and Asian automotive specs. 1 hp is about 1.014 PS.
What is a ton of refrigeration?
A ton of refrigeration (TR) is the rate of heat removal equal to 3,516.85 W (approximately 12,000 BTU/h). It represents the cooling power needed to melt one short ton (2,000 lb) of ice in 24 hours and is commonly used to rate air-conditioning systems.
How many watts is 1 horsepower?
1 mechanical horsepower = 745.7 W (approximately 0.746 kW). This is the standard definition used in the US and UK for rating engines and motors.
Tips for entering values
Select the unit first, then enter a value once — every tile updates instantly.