Formula. watts = horsepower × 745.7.
Relationship. 1 hp = 745.7 W.
Worked example. 150 hp = 111854.9808 W.
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Horsepower to Watts Converter.
Convert horsepower to watts instantly with this free calculator. 1 hp = 745.7 W.
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| W | kW | MW | PS | hp | BTU/h | ft·lb/s |
|---|---|---|---|---|---|---|
| 111.854981 | 0.1118549808 | 0.000111855 | 0.1520804499 | 0.15 | 381.665037 | 82.5 |
| 1118.5498 | 1.11855 | 0.0011185498 | 1.520804 | 1.5 | 3816.6504 | 824.999999 |
| 11185.4981 | 11.185498 | 0.0111854981 | 15.208045 | 15 | 38166.5037 | 8250 |
| 111854.9808 | 111.854981 | 0.1118549808 | 152.08045 | 150 | 381665.0371 | 82499.9999 |
| 1118549.808 | 1118.5498 | 1.11855 | 1520.8045 | 1500 | 3816650.3708 | 824999.9994 |
| 11185498.08 | 11185.4981 | 11.185498 | 15208.045 | 15000 | 38166503.7085 | 8249999.9945 |
| 111854980.8 | 111854.9808 | 111.854981 | 152080.4499 | 150000 | 381665037.0847 | 82499999.9447 |
How to convert horsepower to watts
horsepower to watts conversion table
| hp | W |
|---|---|
| 0.5 | 372.849936 |
| 1 | 745.699872 |
| 1.5 | 1118.5498 |
| 2 | 1491.3997 |
| 3 | 2237.0996 |
| 5 | 3728.4994 |
| 7.5 | 5592.749 |
| 10 | 7456.9987 |
| 15 | 11185.4981 |
| 20 | 14913.9974 |
| 25 | 18642.4968 |
| 50 | 37284.9936 |
| 75 | 55927.4904 |
| 100 | 74569.9872 |
| 125 | 93212.484 |
| 150 | 111854.9808 |
| 175 | 130497.4776 |
| 200 | 149139.9744 |
| 250 | 186424.968 |
| 300 | 223709.9616 |
| 400 | 298279.9488 |
| 500 | 372849.936 |
| 600 | 447419.9232 |
| 750 | 559274.904 |
| 1000 | 745699.872 |
FAQ
Frequently Asked Questions
How do I convert horsepower to watts?
Multiply by 745.7. For example, 150 hp × 745.7 = 111,855 W, or about 111.9 kW.
How many kW is 200 hp?
200 × 745.7 = 149,140 W, which is 149.1 kW. A quick shortcut: divide horsepower by 1.34 to get kilowatts.
What is the difference between hp and PS?
hp (mechanical horsepower) is 745.7 W; PS (metric horsepower, also written CV or pk) is 735.5 W. PS is about 1.4% smaller, so any engine's PS figure is slightly higher than its hp figure for identical output.
Why is horsepower still used?
It dates from James Watt comparing steam engines to draught horses, and it stuck as the familiar way to describe engine output in English-speaking markets. Regulators and registration documents increasingly use kilowatts, but marketing keeps horsepower because buyers recognise the numbers.
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