Ans

Unit converter

Kilowatts to mechanical horsepower.

Convert kW to hp and hp to kW. Type in either box and the other follows. One kilowatt is 1.341 mechanical horsepower — or 1.360 metric horsepower, which is why two brochures can disagree.

kW → hpExact definition
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Kilowatts to mechanical horsepower — common values, to 6 significant figures.
kWhp
25 kW33.5256 hp
50 kW67.0511 hp
75 kW100.577 hp
100 kW134.102 hp
125 kW167.628 hp
150 kW201.153 hp
200 kW268.204 hp
250 kW335.256 hp
300 kW402.307 hp
400 kW536.409 hp
1 kW=1.34102209 hp 1 hp=0.7456998716 kW

Definitions

  • The kilowatt is 1000 watts. EU vehicle documents give engine power in kW, whatever the brochure says.
  • Mechanical horsepower is 745.6999 W, defined as 550 foot-pounds per second. It is the horsepower UK and US brochures quote.
  • This conversion is exact by definition. 1 kW = 1.34102209 hp.
  • Power is converted through W.

How it works

One direction multiplies and the other divides by the same number, so nothing is lost by going back and forth.

The value passes through W, the unit every other power unit on the site is defined against, rather than a number written into this page on its own. That is why the figure here, the figure in the table above and the general power converter always agree.

Display precision limits significant figures rather than decimal places, because one fixed number of decimals is useless across a range this wide. Very large and very small results switch to scientific notation with a proper superscript exponent. The editable box always holds a plain number at full working precision, so you can carry on from either side.

Common questions this answers: how many mechanical horsepower in a kilowatt (1.34102), how many kilowatts in a horsepower (mechanical) (0.7457), and what 100 kW is in mechanical horsepower (134.102 hp).

From the maker of Ans — a scientific calculator you can own. Same idea: a proper instrument, nothing in the way.