Cycling CdA Aerodynamic Drag Calculator - Chung Method
Over 80% of cycling power above 30 km/h is spent fighting aerodynamic drag. Calculate your drag area and time savings over a 40 km TT.
How to Use Aero CdA Calculator in 3 Simple Steps
Step 1: Upload
Drag & drop your .FIT, .GPX, or .TCX activity file. All processing is 100% private in your browser.
Step 2: Process
FitCrop inspects telemetry streams, removes anomalies, recalibrates metrics, or fixes binary checksums.
Step 3: Export
Download your clean Strava, Garmin, and Zwift compatible file with 1 click. Zero server wait.
Frequently Asked Questions
What is a good CdA for a cyclist?
A dedicated time-trial or triathlon racer achieves 0.20 to 0.23 m². A road cyclist in the drops averages 0.28 to 0.32 m², while riding on the brake hoods averages 0.35 to 0.40 m².
How much time does shaving 0.02 m² CdA save?
Shaving 0.02 m² saves approximately 15-20 Watts at 40 km/h, which translates to over 1 minute saved in a 40 km flat time trial.