Climbing speed calculator

Enter your weights, fitness, bike type and gradient. The model combines air resistance (CdA), rolling resistance (Crr) and gravity.

Inputs

Rider (kg)Bike (kg)

Gear (kg)

Fitness levelBike type (aero)Custom power (W)Optional: overrides preset if filled.

Trip distance (km)Total elevation (m)

CdA 0.52 · Crr 0.010 · 150W · 85 kg · avg grade ~ 1.5%

Current speed

18.5km/h

Solid tempo. If you want to go faster, the cheapest upgrade is usually less weight.

Estimated time for trip

5 hours 25 minutes

Weight Tax (Climbing)

Lost speed on this climb

0 km/h

Time tax per 100m

0 min per 100m vertical

Time lost due to gear weight compared to an unloaded bike.

Total Trip Delay: 0 min

Optimization tips

On steeper gradients gravity dominates: every extra +1 kg hurts more than better aerodynamics.
On moderate gradients it makes sense to care about drag: clothing and position can make a big difference.

Note: This is a simplified model without wind and drivetrain losses. It is ideal for comparing “what weight / bike type does” on climbs.