Cycling Speed & Power Calculator
Calculate your cycling power output, speed, and calorie burn for any ride. Useful for training analysis, segment planning, and comparing effort levels.
Cycling Performance
Watts Per Kilogram
W/kg (power-to-weight ratio) is the key cycling performance metric. Cat 5 amateur: 2–3 W/kg. Cat 3: 3.5–4 W/kg. Cat 1 / elite amateur: 4.5–5.5 W/kg. Tour de France pros sustain 5.5–6.5 W/kg for 30+ minutes up climbs.
Estimated vs Measured Power
This calculator estimates power from speed and total mass using aerodynamic and rolling resistance models. A power meter (pedal, crank, or hub-based) gives actual measurement. Estimated values can be 10–20% off depending on road gradient, wind, and position.
Calorie Calculation
Cycling burns approximately 1 kcal per kg per km at moderate effort (15–20 km/h). At higher speeds and power outputs, the relationship shifts. This estimate accounts for rider and bike mass but not gradient or wind.
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