CdA Estimator
Calculate your aerodynamic drag area with precision.
Metric
Imperial
Power (Watts)
Average power output during your test interval.
Speed (km/h)
Average ground speed maintained.
Total Weight (kg)
Total mass: rider + bike + equipment.
Gradient (%)
Slope incline/decline. Use 0 for flat ground.
Crr (Rolling Resistance)
Coefficient of Rolling Resistance. 0.005 is typical for quality road tires.
Air Density (kg/m³)
Air density at sea level is ~1.225.
Calculate CdA
Estimated CdA
0.000
m²
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