Horsepower Calculator

Calculate engine horsepower based on engine displacement, RPM, and torque measurements

Input Parameters

Calculation Results

Calculation Formula

HP = (Torque × RPM) / 5252

Where:
HP = Horsepower
Torque = Engine torque in Newton-meters
RPM = Engine speed in revolutions per minute
5252 = Constant for converting torque to horsepower at 5252 RPM

Calculated Results

Horsepower at Peak Torque:

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Horsepower at Peak Power:

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Additional Calculations

Torque at Peak HP:

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RPM Range (Peak Power):

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Horsepower Calculator Calculator Usage Guide

Learn how to use the Horsepower Calculator calculator and its working principles

How to Use This Calculator

  1. Enter your engine's displacement in cubic centimeters (CC)
  2. Input the RPM at which peak torque occurs
  3. Enter the peak torque value in Newton-meters (Nm)
  4. Provide the RPM at which peak power occurs
  5. Click the "Calculate" button to see the results

Understanding the Results

This calculator provides several important engine performance metrics:

  • Horsepower at Peak Torque: The engine's horsepower output at its torque peak RPM
  • Horsepower at Peak Power: The engine's horsepower output at its power peak RPM
  • Torque at Peak HP: The approximate torque value at the RPM where peak horsepower occurs
  • RPM Range for Peak Power: A typical range where the engine produces maximum power

Important Notes

This calculator uses the standard formula HP = (Torque × RPM) / 5252 to convert between torque and horsepower. The 5252 RPM value represents where horsepower and torque are approximately equal, which is why this formula is commonly used for engine performance calculations.

For more accurate engine performance analysis, consider consulting professional automotive performance charts and specifications for your specific engine model.