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).
Australia is fully metric under the National Measurement Act 1960; imperial units appear only in trade with the US and in older documents.
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 Measurement Institute (NMI) — Australia's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.