Estimate cycling wattage, watts per kilogram, speed, ride effort, FTP percentage, power zone, climbing power, aerodynamic drag, rolling resistance, and calories burned. This calculator is useful for road cycling, gravel riding, mountain biking, bikepacking, indoor training, e-bikes, and climbing analysis.
Power demand:
The calculator estimates how many watts are needed to hold a selected speed based on rider weight, bike weight, grade, wind, surface, and riding position.
Resistance types:
The estimate includes climbing power from grade, rolling resistance from tires and surface, and aerodynamic drag from speed and wind.
Training output:
The calculator also estimates watts per kilogram, FTP percentage, power zone, ride time, calories burned, and energy use.
A cycling wattage calculator helps estimate ride effort, compare climbing power, plan training zones, understand headwind effects, and estimate calories for road cycling, gravel rides, mountain biking, touring, and bikepacking.
Actual wattage depends on tire choice, tire pressure, road surface, wind direction, air density, rider position, drivetrain condition, drafting, clothing, bike fit, and power meter calibration.
This calculator uses a practical cycling power estimate:
Total Watts = Climbing Watts + Rolling Watts + Aerodynamic Watts
It depends on weight, grade, wind, riding position, tires, surface, and drivetrain efficiency. Flat-road speed is heavily affected by aerodynamic drag.
Watts per kilogram is power divided by rider body weight in kilograms. It is especially useful for comparing climbing performance.
Aerodynamic drag rises quickly as air speed increases. Riding 18 mph into a 10 mph headwind can feel much harder than riding 18 mph in calm air.
No. This is an estimate for planning and comparison. A calibrated power meter is more accurate for real training and performance tracking.