CdA and Power (W) Calculator
Seeing as we've not decided that publishing CdA savings for equipment is a reasonable thing. This will convert Watt savings at Speed to CdA, or vice versa.
Formulas for CdA:
W = 0.5 × ρ × CdA × v³
CdA = W / (0.5 × ρ × v³)
where ρ = 1.225 kg/m³, v = speed in m/s (speed in kph × 0.27778)
Crr and Power (W) Calculator
Formulas for Crr:
W = Crr × m × g × v
Crr = W / (m × g × v)
where g = 9.81 m/s², v = speed in m/s (speed in kph × 0.27778), m = mass in kg