Two horsepower definitions
Specifications may use mechanical hp or metric PS. They differ: one mechanical hp is approximately 745.70 W, while one metric PS is 735.49875 W. One kilowatt is 1,000 W. Select the unit actually used by the source specification.
mechanical hp = kW × 1000 ÷ 745.6998715822702; PS = kW × 1000 ÷ 735.49875
Conversion example
100 kW equals approximately 134.10 mechanical hp or 135.96 metric PS. For reverse conversion, select hp or PS explicitly because the factors differ. This changes the units of an existing power value; it does not infer power from engine displacement.
Rounding and measurement point
Intermediate calculations retain precision and only the display is rounded. Unit conversion does not reconcile crankshaft versus wheel power or differing test standards. When comparing vehicles, check both the unit and how the original power was measured.