Horsepower to Metric Horsepower (PS) Converter
Enter a value to instantly convert between power units.
1 Horsepower (mech) = 1.0139 Horsepower (metric)
Key Formulas
Kilowatt → Horsepower (mech)
hp = kW × 1.34102Horsepower (mech) → Kilowatt
kW = hp × 0.7457Watt → Kilowatt
kW = W × 0.001Kilowatt → Watt
W = kW × 1000Formula
PS = hp × 1.01387Automotive enthusiasts and engineers comparing US or British engine specs (hp) to European ratings (PS) run into a consistent 1.4% difference. A 300 hp American V8 equals 304.2 PS — close, but not identical. This matters for online comparisons, import documentation, and racing regulations where a power threshold is specified in PS. The difference comes from the metric definition: 1 PS = 75 kg·m/s = 735.5 W vs. 1 hp = 550 ft·lbf/s = 745.7 W.
Source: NIST SP 811, Table B.8
Last reviewed: · see our methodology
Frequently Asked Questions
Real-World Examples
A 100 hp compact car engine = 101.4 PS — essentially equivalent, but European spec sheets will list it as 101 PS.
100 hp = 101.4 PS
A 200 hp sports car = 202.8 PS — common for mid-range European sports cars where both ratings appear side by side.
200 hp = 202.8 PS
A 500 hp supercar = 506.9 PS — the PS figure is what appears in German, French, and Italian automotive press.
500 hp = 506.9 PS
A 1,000 hp hypercar = 1,013.9 PS — both figures regularly appear in performance car marketing across Atlantic markets.
1000 hp = 1013.9 PS