Direct conversion
Convert horsepower (mechanical) [hp] to milliwatt [mW] instantly with formula, examples, chart, and FAQs.
1 horsepower (mechanical) [hp] = 745699.871582 milliwatt [mW]
1 horsepower (mechanical) [hp] = 745699.871582 milliwatt [mW]
Example: 1 horsepower (mechanical) [hp] equals 745699.871582 milliwatt [mW].
Power conversions use watt as the reference unit and include mechanical horsepower, electrical power, and heat-rate units.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-08-14.
Mechanical horsepower is a power unit equal to about 745.7 watts.
HistoryHorsepower was popularized to compare machine output with work previously done by draft animals.
Current useHorsepower is used for engines, motors, vehicles, pumps, and equipment output ratings.
The milliwatt (mW) is a power unit used to express measurements in this converter.
HistoryThis unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current useUse milliwatt when comparing power values, checking specifications, converting between systems, or preparing quick estimates.
| horsepower (mechanical) [hp] | milliwatt [mW] |
|---|---|
| 1 | 745699.871582 |
| 2 | 1491399.743165 |
| 5 | 3728499.357911 |
| 10 | 7456998.715823 |
| 20 | 14913997.431645 |
| 25 | 18642496.789557 |
| 50 | 37284993.579114 |
| 100 | 74569987.158227 |
| 1000 | 745699871.58227 |
Use this formula: 1 horsepower (mechanical) [hp] = 745699.871582 milliwatt [mW] Enter your value in the calculator and the result updates instantly.
1 horsepower (mechanical) [hp] equals 745699.871582 milliwatt [mW].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.