How many horsepower [water] in 1 horsepower [international]? The answer is 0.99954006884626. We assume you are converting between horsepower [water] and horsepower [international]. You can view more details on each measurement unit: horsepower [water] or horsepower [international] The SI derived unit for power is the watt. 1 watt is equal to 0.0013404053117582 horsepower [water], or 0.001341022089595 horsepower [international]. 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 [water] to horsepower [international] = 1.00046 horsepower [international]
5 horsepower [water] to horsepower [international] = 5.0023 horsepower [international]
10 horsepower [water] to horsepower [international] = 10.0046 horsepower [international]
15 horsepower [water] to horsepower [international] = 15.0069 horsepower [international]
20 horsepower [water] to horsepower [international] = 20.0092 horsepower [international]
25 horsepower [water] to horsepower [international] = 25.0115 horsepower [international]
30 horsepower [water] to horsepower [international] = 30.0138 horsepower [international]
40 horsepower [water] to horsepower [international] = 40.01841 horsepower [international]
50 horsepower [water] to horsepower [international] = 50.02301 horsepower [international]
You can do the reverse unit conversion from horsepower [international] to horsepower [water], or enter any two units below:
unit of power equal to roughly 550 foot-pounds of work per second
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
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