Cycling Aerodynamics Calculator
Compare two riding positions to estimate aerodynamic drag (CdA) using the Chung Method.
How to Use
1. Perform two field tests (e.g., aero vs. upright position) on a flat course, recording average power, speed, and weight.
2. Enter data for Test A and Test B below. Air density and rolling resistance are pre-set for simplicity.
3. Click "Compare" to see CdA, time difference for a 10-mile time trial, and power saved.
Limitations
This calculator uses a simplified Chung Method, assuming flat terrain, steady-state riding, and no wind or elevation changes. Results are estimates and may vary in real-world conditions.
Enter A/B Test Data
Test A
Average power from your power meter.
Average speed in kilometers per hour.
Test B
Average power from your power meter.
Average speed in kilometers per hour.
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Weight of rider, all equipment, bike, etc., in kilograms.
×
Weight of rider, all equipment, bike, etc., in kilograms.
A/B Test Results
| Test | CdA (m²) | Power (W) | Speed (kph) |
|---|