Aero Drag Horsepower Calculator

Inputs

Road speed (v)

Target steady road speed.

km/h

Drag coefficient (Cd)

Vehicle aerodynamic drag coefficient.

Frontal area (A)

Vehicle frontal area.

m²

Air density (rho)

Air density at conditions of interest.

kg/m³

Rolling resistance (Crr)

Tire rolling resistance coefficient.

Vehicle mass (m)

Vehicle mass used for rolling resistance.

Default result

Road-load power

18.74kW

Pass

Also computed

Total road load598.8N

134.6 lbf

Drag power13.21kW

Drag force422.2N

94.93 lbf

Rolling force176.5N

39.68 lbf

Method notes 2 notes

Power is wheel power to overcome aerodynamic drag and rolling resistance at steady speed.
Acceleration, grade, drivetrain loss, fan loads, tire pressure, wind, ride height and aero balance are not included.