Formula. horsepower = watts ÷ 745.7.
Relationship. 1 hp = 745.7 W.
Worked example. 1000 W = 1.341022 hp.
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Watts to Horsepower Converter.
Convert watts to horsepower instantly with this free calculator. 1 hp = 745.7 W.
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| W | kW | MW | PS | hp | BTU/h | ft·lb/s |
|---|---|---|---|---|---|---|
| 1 | 0.001 | 0.000001 | 0.0013596216 | 0.0013410221 | 3.412142 | 0.7375621484 |
| 10 | 0.01 | 0.00001 | 0.0135962162 | 0.0134102209 | 34.121416 | 7.375621 |
| 100 | 0.1 | 0.0001 | 0.1359621617 | 0.1341022089 | 341.214164 | 73.756215 |
| 1000 | 1 | 0.001 | 1.359622 | 1.341022 | 3412.1416 | 737.562148 |
| 10000 | 10 | 0.01 | 13.596216 | 13.410221 | 34121.4164 | 7375.6215 |
| 100000 | 100 | 0.1 | 135.962162 | 134.102209 | 341214.1635 | 73756.2148 |
| 1000000 | 1000 | 1 | 1359.6216 | 1341.0221 | 3412141.6351 | 737562.1484 |
How to convert watts to horsepower
watts to horsepower conversion table
| W | hp |
|---|---|
| 100 | 0.1341022089 |
| 250 | 0.3352555222 |
| 500 | 0.6705110444 |
| 746 | 1.000402 |
| 1000 | 1.341022 |
| 1500 | 2.011533 |
| 2000 | 2.682044 |
| 2500 | 3.352555 |
| 3000 | 4.023066 |
| 4000 | 5.364088 |
| 5000 | 6.70511 |
| 7500 | 10.057666 |
| 10000 | 13.410221 |
| 15000 | 20.115331 |
| 20000 | 26.820442 |
| 25000 | 33.525552 |
| 37285 | 50.000009 |
| 50000 | 67.051104 |
| 75000 | 100.576657 |
| 100000 | 134.102209 |
| 111855 | 150.000026 |
| 150000 | 201.153313 |
| 200000 | 268.204418 |
| 250000 | 335.255522 |
| 500000 | 670.511044 |
FAQ
Frequently Asked Questions
How do I convert watts to horsepower?
Divide the watt figure by 745.7, the size of one mechanical horsepower. For example, 1,000 W ÷ 745.7 ≈ 1.34 hp.
How many watts is 1 horsepower?
Mechanical horsepower is 745.7 watts. Metric horsepower (PS, used across much of Europe) is slightly smaller at 735.5 W — about 1.4% less, which is why the same engine is quoted as 300 hp in the US and 304 PS in Germany.
How much horsepower is a 1500 W motor?
1,500 W ÷ 745.7 ≈ 2.01 hp. Household appliances sit in this range: a typical kettle or hairdryer draws 1.5–2 kW, or roughly 2–2.7 hp.
Is kW the same as horsepower?
No — they measure the same quantity in different units. 1 kW ≈ 1.341 hp, so a 111.9 kW engine is 150 hp. European vehicle registration documents list kW while marketing usually leads with hp or PS.
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