Convert Metric horsepower to Watts
1 metric horsepower is 735.49875 W. One metric horsepower is exactly 735.49875 watts.
One metric horsepower is 735.49875 watts. To convert metric horsepower to watts, multiply by 735.49875; to go the other way, divide by 735.49875 or multiply by 0.0013596216. The factor is exact rather than rounded: it follows from NIST Special Publication 811. Exactly 75 kilogram-force metres a second, which is 1.4% less than mechanical horsepower.
Factor checked against the defining standard · How we check
- Metric horsepower × 735.49875
value * 735.49875735.499 W
1 metric horsepower in every power unit
| Unit | Value | Exact factor |
|---|---|---|
| horsepower | 0.9863200706 hp | × 0.98632007062 |
| metric horsepower (as entered) | 1 PS | — |
| watts | 735.49875 W | × 735.49875 |
| kilowatts | 0.73549875 kW | × 0.73549875 |
| megawatts | 0.00073549875 MW | × 0.00073549875 |
| BTU per hour | 2,509.625906 BTU/h | × 2,509.62590599 |
Factors are entered by hand from NIST Special Publication 811 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert metric horsepower to watts?
- 1.Take the measurement in metric horsepower.
- 2.Multiply by 735.49875 — that is how many watts fit in one metric horsepower.
- 3.To go back the other way, divide by 735.49875, or multiply by 0.0013596216.
Worked example: 25 metric horsepower to watts
- Formula
- PS × 735.49875 = W
- Arithmetic
- 25 × 735.49875 = 18,387.46875 W
- Answer
- 25 PS = 18,387.46875 W
The factor is exact, so this figure is exact too — only the display is rounded.
Metric horsepower to watts conversion table
| Metric horsepower | Watts |
|---|---|
| 1 PS | 735.49875 W |
| 2 PS | 1,470.9975 W |
| 3 PS | 2,206.49625 W |
| 4 PS | 2,941.995 W |
| 5 PS | 3,677.49375 W |
| 6 PS | 4,412.9925 W |
| 7 PS | 5,148.49125 W |
| 8 PS | 5,883.99 W |
| 9 PS | 6,619.48875 W |
| 10 PS | 7,354.9875 W |
| 12 PS | 8,825.985 W |
| 15 PS | 11,032.48125 W |
| 20 PS | 14,709.975 W |
| 25 PS | 18,387.46875 W |
| 50 PS | 36,774.9375 W |
| 100 PS | 73,549.875 W |
| 200 PS | 147,099.75 W |
| 300 PS | 220,649.625 W |
| 500 PS | 367,749.375 W |
| 1000 PS | 735,498.75 W |
| 2000 PS | 1,470,997.5 W |
| 5000 PS | 3,677,493.75 W |
| 10000 PS | 7,354,987.5 W |
What is a metric horsepower?
Exactly 75 kilogram-force metres a second, which is 1.4% less than mechanical horsepower. A German car quoted at 150 PS is 148 hp, and the difference is the definition rather than the engine.
What is a watt?
The SI unit: one joule every second. A watt is a rate, not an amount, which is the distinction between it and the watt-hour on your electricity bill.
How many watts are in a metric horsepower?
One metric horsepower is 735.49875 watts, exactly. Going the other way, one watt is 0.0013596216 metric horsepower. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every power unit here
| Unit | Symbol | One of these is |
|---|---|---|
| Horsepower | hp | 745.69987 watt |
| Metric horsepower | PS | 735.49875 watt |
| Watts | W | the base unit |
| Kilowatts | kW | 1000 watt |
| Megawatts | MW | 1000000 watt |
| BTU per hour | BTU/h | 0.29307107 watt |
Source: NIST Special Publication 811 — mechanical horsepower is 550 ft·lbf/s exactly
Questions people actually ask
- How many watts are in a metric horsepower?
- 735.49875. The SI unit: one joule every second. A watt is a rate, not an amount, which is the distinction between it and the watt-hour on your electricity bill.
- How do I convert watts back to metric horsepower?
- Divide by 735.49875, or multiply by 0.0013596216 — they are the same operation.
Other power conversions
Watts to metric horsepower — the same conversion the other way.