Power Converter

Convert watts, kilowatts, megawatts, horsepower, metric horsepower (PS), BTU/h and tons of refrigeration.

About this converter

Mechanical horsepower is 745.7 W while metric horsepower (PS) is 735.5 W, so the two are not interchangeable. Air conditioners are rated in “tons” of refrigeration: 1 TR is 3.517 kW, or 12,000 BTU/h.

Common horsepower (mechanical) to kilowatts conversions

To convert horsepower (mechanical) to kilowatts, multiply by 0.7457. To go back, divide by the same number (or multiply by 1.34102).

Value	Horsepower (mechanical) → Kilowatts	Kilowatts → Horsepower (mechanical)
1	1 hp = 0.7457 kW	1 kW = 1.34102 hp
2	2 hp = 1.4914 kW	2 kW = 2.68204 hp
5	5 hp = 3.7285 kW	5 kW = 6.70511 hp
10	10 hp = 7.457 kW	10 kW = 13.4102 hp
20	20 hp = 14.914 kW	20 kW = 26.8204 hp
50	50 hp = 37.285 kW	50 kW = 67.0511 hp
100	100 hp = 74.57 kW	100 kW = 134.102 hp
1,000	1,000 hp = 745.7 kW	1,000 kW = 1,341.02 hp

Frequently asked questions

How many watts is 1 HP?

1 mechanical horsepower is 745.7 watts.

How many kW is a 1.5 ton AC?

A 1.5-ton air conditioner has a cooling capacity of about 5.28 kW (18,000 BTU/h). Its electrical input is much lower.