Horsepower to Force Calculator

Convert horsepower (HP) to force (Newtons) based on engine power and operating speed

Input Parameters

Default: 0.05 meters (typical car drive shaft)

Calculation Results

Calculation Results

Force (Newtons):

0.00 N

Force (Kilograms):

0.00 kg

Calculation Formula

Force = (Horsepower × 745.7) / (2 × π × Speed × Radius)

Where:
- Horsepower (HP): Engine power in horsepower
- Speed: Engine speed in RPM (Revolutions Per Minute)
- Radius: Drive shaft radius in meters
- π: Mathematical constant (approximately 3.14159)
- 745.7: Conversion factor from horsepower to watts

Horsepower to Force Calculator Calculator Usage Guide

Learn how to use the Horsepower to Force Calculator and understand the relationship between engine power and force

How to Use This Calculator

  1. Enter the horsepower (HP) rating of your engine. This is typically found in the vehicle's specifications.
  2. Input the engine speed in RPM (Revolutions Per Minute). This can be measured with a tachometer or obtained from vehicle performance data.
  3. Specify the radius of the drive shaft (in meters). The default value (0.05 m) is suitable for most passenger vehicles, but you can adjust this for different applications.
  4. Click the "Calculate" button to compute the resulting force in Newtons and the approximate mass equivalent.

Understanding the Calculation

The calculator uses the physical relationship between power, force, and velocity:

Power (P) = Force (F) × Velocity (V)

Where:

  • Power is measured in watts (W), with 1 horsepower = 745.7 watts
  • Force is measured in newtons (N)
  • Velocity is measured in meters per second (m/s), which is derived from RPM and radius

The formula used is: F = (HP × 745.7) / (2 × π × Speed × Radius)

Applications

This calculator is useful for:

  • Engineering calculations in vehicle dynamics and powertrain design
  • Understanding how engine power translates to force at the wheels
  • Comparing different engine configurations based on their force output
  • Calculating the effective force available for acceleration or traction