Wheel Horsepower Calculator

Calculate the horsepower delivered to a wheel based on engine power, transmission ratio, and wheel radius.

Input Parameters

Calculation Results

Calculation Formula

Wheel Horsepower (WH) = Engine HP × Transmission Ratio × Differential Ratio × 0.00156

Where:
Wheel Horsepower (WH): Power delivered to the wheels
Engine HP: Engine horsepower
Transmission Ratio: Gear ratio of the transmission
Differential Ratio: Gear ratio of the differential
0.00156: Conversion factor (2π ÷ 60 ÷ 1000)

Calculation Result

Wheel Horsepower: 0.00 HP

Additional Information

Torque at Wheel: 0.00 Nm

Note: These calculations are approximate and assume no power losses in the drivetrain.

Wheel Horsepower Calculator Calculator Usage Guide

Learn how to use the Wheel Horsepower Calculator and understand its applications

How to Use This Calculator

  1. Enter the engine horsepower of your vehicle.
  2. Input the transmission ratio (gear ratio) of your vehicle's transmission.
  3. Enter the differential ratio of your vehicle's differential.
  4. Input the wheel radius in meters (you can measure from the center to the edge).
  5. Click the "Calculate" button to compute the wheel horsepower and torque.

Understanding Wheel Horsepower

Wheel horsepower is the amount of power delivered to your vehicle's wheels from the engine. It differs from engine horsepower because it accounts for power losses in the drivetrain components like transmission, differential, and driveshaft.

Applications

This calculator can be used by:

  • Automotive enthusiasts to understand how power is delivered to the wheels.
  • Engineers to analyze vehicle performance.
  • Off-road enthusiasts to determine wheel torque for traction calculations.

Example Calculation

For a vehicle with:

  • Engine HP: 200 HP
  • Transmission Ratio: 3.5
  • Differential Ratio: 4.10
  • Wheel Radius: 0.3 meters

The wheel horsepower would be: 200 × 3.5 × 4.10 × 0.00156 = 4.75 HP