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Cycling Power Calculator

Estimated cycling power from speed and grade.

Estimate the power required to cycle at a given speed on a given grade, accounting for rolling resistance, aerodynamic drag, and elevation gain.

Priya Venkatesan By Priya Venkatesan
Published Last reviewed 1 min read

Inputs

kg
km/h
%
m²

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

P = Crr·m·g·v + ½·ρ·CdA·v³ + m·g·sin(arctan(grade%/100))·v

In depth

Estimate the power required to cycle at a given speed on a given grade, accounting for rolling resistance, aerodynamic drag, and elevation gain.