PS to Watts Converter
Convert metric horsepower to watts — multiply by 735.5. Results update as you type; exact factors shown.
One metric horsepower (PS) is 735.4988 watts — see the exact factor, not a rounded rule of thumb.
How the ps to watts converter works
Power converts through the watt. Mechanical horsepower is 550 ft·lbf/s = 745.6999 W; metric horsepower (PS, used in European car specs) is 735.4988 W. Air-conditioner capacities are quoted in kW, BTU/h (1 W = 3.412 BTU/h) or tons of refrigeration (3.517 kW).
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common power conversions
| From | To | Units |
|---|---|---|
| 1 PS | 735.4988 W | metric horsepower (PS) to watts |
| 10 PS | 7,354.9875 W | metric horsepower (PS) to watts |
| 50 PS | 36,774.9375 W | metric horsepower (PS) to watts |
| 100 PS | 73,549.875 W | metric horsepower (PS) to watts |
| 150 PS | 110,324.8125 W | metric horsepower (PS) to watts |
| 200 PS | 147,099.75 W | metric horsepower (PS) to watts |
| 250 PS | 183,874.6875 W | metric horsepower (PS) to watts |
| 300 PS | 220,649.625 W | metric horsepower (PS) to watts |
| 400 PS | 294,199.5 W | metric horsepower (PS) to watts |
| 500 PS | 367,749.375 W | metric horsepower (PS) to watts |
| 700 PS | 514,849.125 W | metric horsepower (PS) to watts |
| 1,000 PS | 735,498.75 W | metric horsepower (PS) to watts |
Units in this converter and their exact factors
| Unit | Symbol | One unit in watts |
|---|---|---|
| watt | W | 1 watt |
| kilowatt | kW | 1,000 watt |
| megawatt | MW | 1,000,000 watt |
| horsepower (mechanical) | hp | 745.6998715823 watt |
| metric horsepower (PS) | PS | 735.49875 watt |
| BTU per hour | BTU/h | 0.29307107 watt |
| ton of refrigeration | TR | 3,516.8528421 watt |
FAQFrequently asked questions about power conversion
How many watts is 1 PS?
735.5 W.
What is 150 PS in kW?
110.3 kW.
Is PS the same as hp?
No — hp is 745.7 W, about 1.4% more.
Why are there two horsepowers?
James Watt defined the mechanical one; continental Europe defined a metric version from the kilogram-force.
What is 300 PS in watts?
220,650 W.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.