Cycling
Calculators for cyclists: gear inches, speed from cadence, FTP and power zones, power to weight, spoke length and calories burned, with the formulas shown.
Cycling Calories Calculator
Calculate calories burned cycling from your average power and ride time. Uses work in kilojoules and human metabolic efficiency. Free and private.
Cycling Speed Calculator
Calculate bike speed from cadence, gearing and wheel size. Get speed in km/h and mph for any chainring, cog and wheel combination. Free and private.
FTP Calculator
Estimate your cycling FTP from a 20 minute power test, then get all seven Coggan training zones in watts. Free FTP and power zone calculator.
Gear Inches Calculator
Calculate bike gear inches and metres of development from chainring teeth, cog teeth and wheel size. Compare gears across any drivetrain. Free and private.
Power to Weight Calculator
Calculate your cycling power to weight ratio in watts per kilogram from power and body weight. Enter weight in kg or lb. Free W/kg calculator.
Spoke Length Calculator
Calculate bicycle spoke length from rim ERD, hub flange measurements, spoke count and cross pattern. Standard wheelbuilding formula. Free and private.