Climbs

How many watts to drag yourself up that hill?

Ride

Rider weight 75 kg
Bike + gear weight 9 kg
Grade 6 %
Target speed 10 km/h
Sustainable power 200 W
Sustainable effort 3.00 W/kg
Uses your last-set — that's 225 W at the pedals at this W/kg.
Preferred cadence 90 rpm

Required at the pedals

—
W
— W/kg
Gravity
— W
Rolling
— W
Aero
— W
Drivetrain
— W

Gearing

At target speed
10.0 km/h × 80 rpm
— : 1
— gi · — m/rev
At sustainable power
200 W → 0 km/h
— : 1
— gi · — m/rev
Will your gearing get you there? — (testing target)
?
Your bike T ×
easiest 1.06 : 1
For a full cog-by-cog comparison, or to shop cassettes and chainrings, browse setups on Gears →
Advanced: surface, position, wind, air
Surface (Crr) 0.005
Position (CdA) 0.40 m²
Headwind 0 km/h
Air density 1.225 kg/m³
Drivetrain efficiency 97%
Wheel circumference 2.105 m
P = (m·g·sin θ + Crr·m·g·cos θ + ½·ρ·CdA·vair²) · v ÷ η
Martin et al. (1998), J. Applied Biomechanics. Numbers are estimates — your real wattage will depend on conditions you can't see from a slider.