Cycling Power Calculator

Calculate cycling power output based on speed, weight, grade, and conditions. Estimate watts and power-to-weight ratio.

Total Weight (Rider + Bike)

Speed

km/h

Grade

Wind Speed

km/h

Tab to move between fields

Total Power

174.48 W

Watts per kg

2.18 W/kg

Rolling Resistance32.7 W

Air Resistance141.78 W

Climbing Power0 W

How to Use This Calculator

Enter your Total Weight (rider plus bike) in pounds or kilograms.
Set your Speed, Grade (hill gradient %), and Wind Speed.
Review the Total Power output in watts and the breakdown by aerodynamic drag, rolling resistance, and climbing.
Use the Watts per Kilogram (W/kg) value to benchmark your power-to-weight ratio.

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Formula

Power = Rolling Resistance + Air Resistance + Climbing Power

Calculate cycling speed, distance, or time. Includes pace, calorie burn estimates, and metric conversions.

Calculate your running pace per mile and per kilometer. Get predicted race times for 5K, 10K, half marathon, and marathon distances.

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