How many horsepower [international] in 1 horsepower? The answer is 1.0004024788379. We assume you are converting between horsepower [international] and horsepower [electric]. You can view more details on each measurement unit: horsepower [international] or horsepower The SI derived unit for power is the watt. 1 watt is equal to 0.001341022089595 horsepower [international], or 0.0013404825737265 horsepower. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between horsepower and horsepower. Type in your own numbers in the form to convert the units!
1 horsepower [international] to horsepower = 0.9996 horsepower
5 horsepower [international] to horsepower = 4.99799 horsepower
10 horsepower [international] to horsepower = 9.99598 horsepower
20 horsepower [international] to horsepower = 19.99195 horsepower
30 horsepower [international] to horsepower = 29.98793 horsepower
40 horsepower [international] to horsepower = 39.98391 horsepower
50 horsepower [international] to horsepower = 49.97988 horsepower
75 horsepower [international] to horsepower = 74.96983 horsepower
100 horsepower [international] to horsepower = 99.95977 horsepower
You can do the reverse unit conversion from horsepower to horsepower [international], or enter any two units below:
The term horsepower was invented by the engineer James Watt in 1782. Mechanical horsepower is defined in this way:
1 hp = 33,000 ft·pound-force·min−1 = exactly 745.69987158227022 W
The electrical horsepower is used by the electrical industry for electrical machines and is defined to be exactly 746 W (at 100% efficiency).
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