Watts to PS (Metric Horsepower) Converter
Convert watts to metric horsepower — one PS is 735.5 watts. Results update as you type; exact factors shown.
One watt is 0.0014 metric horsepower (PS) — see the exact factor, not a rounded rule of thumb.
How the watts to ps (metric horsepower) 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 |
|---|---|---|
| 735.5 W | 1 PS | watts to metric horsepower (PS) |
| 1,000 W | 1.3596 PS | watts to metric horsepower (PS) |
| 5,000 W | 6.7981 PS | watts to metric horsepower (PS) |
| 10,000 W | 13.5962 PS | watts to metric horsepower (PS) |
| 50,000 W | 67.9811 PS | watts to metric horsepower (PS) |
| 75,000 W | 101.9716 PS | watts to metric horsepower (PS) |
| 100,000 W | 135.9622 PS | watts to metric horsepower (PS) |
| 110,000 W | 149.5584 PS | watts to metric horsepower (PS) |
| 150,000 W | 203.9432 PS | watts to metric horsepower (PS) |
| 200,000 W | 271.9243 PS | watts to metric horsepower (PS) |
| 250,000 W | 339.9054 PS | watts to metric horsepower (PS) |
| 500,000 W | 679.8108 PS | watts to metric horsepower (PS) |
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
What is PS?
Pferdestärke, metric horsepower — 735.5 W, used across European car specifications.
How is it different from hp?
Mechanical horsepower is 745.7 W, so PS figures read about 1.4% higher for the same engine.
What is 100,000 W in PS?
136 PS.
Why do German cars quote PS?
It is the traditional continental unit; the same car is often listed in kW and PS together.
What is 1 PS in hp?
0.9863 hp.
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.