What does the Torque to Horsepower Calculator do?
It applies the stated engineering conversion or estimation formula to the values you enter.
Torque to Horsepower Calculator
Estimate horsepower from shaft torque in ft-lb or N·m and rotational speed in RPM.
Calculate horsepower
Enter torque, choose its unit, and enter RPM.
About this converter
How to use Torque to Horsepower Calculator, plus the formulas and logic behind the results.
Tool description
Mechanical horsepower combines shaft torque with rotational speed. N·m inputs are converted to ft-lb before applying the conventional formula.
How to use
- Enter the known value in the first field.
- Choose the source and destination units when unit menus are shown.
- Select Calculate to run the conversion.
- Review the main result and any supporting equivalents.
Formulas & reference
HP = torque(ft-lb) × RPM ÷ 5252torque(ft-lb) = torque(N·m) ÷ 1.3558179483314
Calculation logic
The tool normalizes torque to ft-lb, multiplies it by RPM, and divides by 5252.
This is calculated mechanical horsepower and does not include drivetrain, electrical, thermal, or other efficiency losses.
Torque to Horsepower Calculator FAQ
Common questions about this conversion and how to interpret the result.
Can I enter decimal values?
Yes. Decimal and whole-number inputs are supported.
Can I use negative values?
Unit conversions can represent signed values. Physical estimates may require non-negative inputs as noted.
How precise are the results?
Calculations use the constants shown in the formula section; displayed values may be rounded.
Are the results suitable for engineering design?
Use them for reference and education. Confirm safety-critical work with applicable standards and qualified engineers.
Is this calculator free to use?
Yes. It can be used without registration.