C_dA Calculator

Choose temperature, altitude, tires, drivetrain efficiency and calculate the CdA for a given power output and speed.

Temperature = °C

Course Altitude = m

Rolling resistance coefficientcoeff. CRR = 0.00

Drivetrain efficiency = %

Weight of rider + bike = kg

Speed = km/h

Power = Watt

Temperature = °C
Course Altitude = m
CRR = 0.00
Drivetrain efficiency = %
Weight of rider + bike = kg
Speed = km/h
Power = Watt

C_dA

0 m²

About the C_dA calculator

Maybe the name C_dA Calculator is a little bit misleading. Since one has to make quite a few assumptions under which this Calculator works maybe the name "C_dA Estimator" would be more suitable - but who would Google this Keywords ;-).

To name the most important assumptions: flat course and no head or tailwind. Moreover it is difficult to get accurate numbers for the rolling resistance coefficient and the drivetrain efficiency.

Here you can find a Power to Speed Calculator together with some notes on the calculators and the formulas behind them.