Convert hp to watts

1 horsepower equals 745.7 watts. To convert horsepower to watts, multiply the number of horsepower by 745.7: for example, 10 hp is 7,457 W. Ethical Tube's free hp to watts converter does the math as you type, and the chart below lists common values.

FromTo

1 hp = 745.7 W

1 hp: 745.7 W
1 W: 0.00134102 hp
Formula: W = hp × 745.7
Measures: Power
Price: Free
Works offline: Yes

Conversion chart

hp to watts chart

Horsepower (hp)	Watts (W)
1 hp	745.7 W
2 hp	1,491.4 W
3 hp	2,237.1 W
4 hp	2,982.8 W
5 hp	3,728.5 W
6 hp	4,474.2 W
8 hp	5,965.6 W
10 hp	7,457 W
12 hp	8,948.4 W
15 hp	11,185.5 W
20 hp	14,914 W
25 hp	18,642.5 W
50 hp	37,285 W
100 hp	74,570 W

How it works

How to convert hp to watts

Know the formula
W = hp × 745.7. In words: multiply the number of horsepower by 745.7.
Work an example
10 hp → 7,457 W. Round to two or three decimal places for everyday use.
Or type it in
Enter any value in the converter above and the answer appears instantly, in both directions.

Good to know

About power units

This converter uses mechanical horsepower (745.7 watts), common for engines in the US and UK. Metric horsepower (PS) is slightly smaller, 735.5 watts.
Air conditioner ratings in BTU are BTU per hour. A 12,000 BTU unit (one ton of cooling) uses about 3.5 kW of cooling power.

FAQ

Questions, answered

How many watts are in a horsepower?

There are 745.7 watts in 1 horsepower. To convert horsepower to watts, multiply the number of horsepower by 745.7.

What is 10 hp in watts?

10 horsepower is 7,457 watts.

How do you convert watts back to hp?

Multiply the number of watts by 0.00134102. 1 watt is 0.00134102 horsepower.

Is this hp to watts converter free?

Yes. It's free and works in any browser, even offline once the page has loaded. The answer updates as you type, and nothing you enter is sent anywhere.

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