Watt to Mechanical horsepower Converter (and vice versa)

Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026

This converter allows you to convert watts [W] to mechanical horsepower [hp(I)] or mechanical horsepower [hp(I)] to watts [W]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.

1 watt [W] ≈ 0.0013 mechanical horsepower [hp(I)]1 mechanical horsepower [hp(I)] ≈ 745.6999 watts [W]

Convert watts to mechanical horsepower

There are two simple ways to convert watts [W] to mechanical horsepower [hp(I)]. In the first calculation method, the value in watts [W] is divided by the rounded conversion factor of 745.6999. The second method multiplies the value in watts [W] by the rounded conversion factor of 0.0013.

  • Mechanical horsepower [hp(I)] ≈ watts [W] ÷ 745.6999
  • Mechanical horsepower [hp(I)] ≈ watts [W] * 0.0013

However, rounded conversion values are only suitable for rough conversions, as rounding errors can occur in the calculation result. The most accurate conversion of watts [W] to mechanical horsepower [hp(I)] can be achieved using the following calculation method.

  • Mechanical horsepower [hp(I)] = watts [W] ÷ 27.2155422 ÷ 27.3997801

Convert mechanical horsepower to watts

Converting mechanical horsepower [hp(I)] to watts [W] is easy and can be done in two ways. The first method involves multiplication, in which the value in mechanical horsepower [hp(I)] is multiplied by the rounded conversion factor of 745.6999. The second variant is a division. Here, the value in mechanical horsepower [hp(I)] is divided by the rounded conversion factor of 0.0013.

  • Watts [W] ≈ mechanical horsepower [hp(I)] * 745.6999
  • Watts [W] ≈ mechanical horsepower [hp(I)] ÷ 0.0013

However, rounded conversion values do not allow for exact calculations because rounding errors can occur in the calculation result. The most accurate conversion of mechanical horsepower [hp(I)] to watts [W] can be achieved using the following calculation method.

  • Watts [W] = mechanical horsepower [hp(I)] * 27.2155422 * 27.3997801

Converter

Decimal places

How it's calculated

Factor: 
≈ 745.7
Mechanical horsepower = Watts ÷ 27.2155422 ÷ 27.3997801
Watts = Mechanical horsepower * 27.2155422 * 27.3997801

To all available units

Watts

Megawatts

Watts

Metric horsepower

Watts

Microwatts

Watts

Milliwatts

Watts

Nanowatts

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