Aero Drag Horsepower Calculator
SI
Imp
Imperial
Inputs
View results
Road speed
(v)
Target steady road speed.
mph
Drag coefficient
(Cd)
Vehicle aerodynamic drag coefficient.
Frontal area
(A)
Vehicle frontal area.
ft²
Air density
(rho)
Air density at conditions of interest.
lb/ft³
Rolling resistance
(Crr)
Tire rolling resistance coefficient.
Vehicle mass
(m)
Vehicle mass used for rolling resistance.
lb
Results
Default result
Edit inputs
Road-load power
25.13
hp
Pass
Also computed
Total road load
134.6
lbf
134.6 lbf
Drag power
17.72
hp
Drag force
94.93
lbf
94.93 lbf
Rolling force
39.68
lbf
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.
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