Free Tool
Cycling Wattage Calculator | Running
Cycling Wattage Calculator - Estimates power output based on speed, weight, and gradient
Built by an engineer who chases finish lines and is obsessed with data. Thomas Prommer — technology executive who has worked with Google, Apple, Nike, Adidas, Netflix and other global brands. Also an Ironman finisher, HYROX Pro Division competitor, and marathon runner. These tools combine engineering rigor with real race experience.
Cycling Wattage Calculator
Estimates power output based on speed, weight, and gradient.
Methodology
Estimates power output based on speed, weight, and gradient. P = (CdA * rho * v^3 / 2) + (Crr * m * g * v) + (m * g * grade * v). Typical FTP: 2-4 W/kg.
FAQ
How does this calculator work?
Estimates power output based on speed, weight, and gradient. P = (CdA * rho * v^3 / 2) + (Crr * m * g * v) + (m * g * grade * v). Typical FTP: 2-4 W/kg.
What units are supported?
km, miles, min/km, min/mi, km/h, mph. Toggle between metric and imperial.
How accurate is this?
Mathematically exact for pace/speed/time conversions. Real-world performance varies with conditions.
Can I use this for race planning?
Yes, use the split times and pace bands for race day execution strategy.