Estimate cycling speed from power (watts) using your weight, bike weight, gradient, surface type and wind. Physics-based with realistic rolling resistance and CdA presets.
| Force component | Watts | % of total |
|---|
Total power = rolling resistance + aerodynamic drag + gravity + drivetrain loss. Specifically: P = Crr·m·g·v + ½·ρ·CdA·(v + wind)²·v + m·g·sin(atan(grade))·v, divided by 0.95 drivetrain efficiency.
Constants: air density ρ = 1.225 kg/m³, g = 9.8067 m/s². Speed solved by binary search.
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