Horsepower Calculator
Calculate horsepower based on torque and RPM, or convert between different horsepower units. Understand engine power measurement and conversions for vehicles, machinery, and more.
Step 1: Horsepower Calculation
Understanding Horsepower
Horsepower is calculated as: HP = (Torque × RPM) / 5252 (for lb-ft) or HP = (Torque × RPM) / 7127 (for Nm). This formula shows the relationship between torque and rotational speed in determining power output.
Step 2: Horsepower Converter
About Horsepower Units
Mechanical horsepower (hp) is approximately 745.7 watts. Metric horsepower (PS) is about 735.5 watts. Electrical horsepower is exactly 746 watts. Boiler horsepower is about 9,809.5 watts. One kilowatt equals approximately 1.341 mechanical horsepower.
Horsepower Results
Calculated Horsepower
Horsepower Conversion Results
| Unit Type | Value | Equivalent Watts |
|---|
Power Unit Comparison
Vehicle Power Comparison
| Vehicle Type | Typical Horsepower | Torque (lb-ft) | Power-to-Weight (hp/lb) |
|---|
Power-to-Weight Ratio
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