How many horsepower [international] in 1 horsepower [water]? The answer is 1.0004601427877. We assume you are converting between horsepower [international] and horsepower [water]. You can view more details on each measurement unit: horsepower [international] or horsepower [water] The SI derived unit for power is the watt. 1 watt is equal to 0.001341022089595 horsepower [international], or 0.0013404053117582 horsepower [water]. 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 [water] = 0.99954 horsepower [water]
5 horsepower [international] to horsepower [water] = 4.9977 horsepower [water]
10 horsepower [international] to horsepower [water] = 9.9954 horsepower [water]
20 horsepower [international] to horsepower [water] = 19.9908 horsepower [water]
30 horsepower [international] to horsepower [water] = 29.9862 horsepower [water]
40 horsepower [international] to horsepower [water] = 39.9816 horsepower [water]
50 horsepower [international] to horsepower [water] = 49.977 horsepower [water]
75 horsepower [international] to horsepower [water] = 74.96551 horsepower [water]
100 horsepower [international] to horsepower [water] = 99.95401 horsepower [water]
You can do the reverse unit conversion from horsepower [water] 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
unit of power equal to roughly 550 foot-pounds of work per second
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