Power Converter

Convert Watt, kW, horsepower (hp/PS) and BTU/h instantly.

Inputs

Watt

Kilowatt

Horsepower (mechanical)

Pferdestärke (metric hp)

BTU per HourBTU/h

The Watt (W) is the SI unit of power, equal to 1 J/s. Mechanical and electrical power are both expressed in W or kW. Power plants, electric motors and consumer appliances all use these units.
The mechanical horsepower (hp) was defined by James Watt as 550 ft·lbf/s = 745.70 W. The metric horsepower (PS from German Pferdestärke) = 75 kgf·m/s = 735.50 W. Engine power ratings often appear in both.
BTU/h (British Thermal Unit per hour) is used for heating and cooling capacity in HVAC systems. Air conditioners and chillers are rated in BTU/h or tons of refrigeration (1 ton = 12,000 BTU/h ≈ 3.517 kW).
Quick reference: 1 kW = 1.34102 hp = 1.35962 PS = 3,412.14 BTU/h · 1 hp = 0.745700 kW = 0.98632 PS · 1 PS = 0.735499 kW = 0.98632 hp.

Convert Watt, kW, horsepower (hp/PS) and BTU/h instantly.

Watt

Kilowatt

Horsepower (mechanical)

Pferdestärke (metric hp)

BTU per HourBTU/h

The Watt (W) is the SI unit of power, equal to 1 J/s. Mechanical and electrical power are both expressed in W or kW. Power plants, electric motors and consumer appliances all use these units.
The mechanical horsepower (hp) was defined by James Watt as 550 ft·lbf/s = 745.70 W. The metric horsepower (PS from German Pferdestärke) = 75 kgf·m/s = 735.50 W. Engine power ratings often appear in both.
BTU/h (British Thermal Unit per hour) is used for heating and cooling capacity in HVAC systems. Air conditioners and chillers are rated in BTU/h or tons of refrigeration (1 ton = 12,000 BTU/h ≈ 3.517 kW).
Quick reference: 1 kW = 1.34102 hp = 1.35962 PS = 3,412.14 BTU/h · 1 hp = 0.745700 kW = 0.98632 PS · 1 PS = 0.735499 kW = 0.98632 hp.