Free tools
Calculators for endurance athletes
Work out your FTP and critical power, how many carbs to eat per hour, and what a ride burns. Free, no account needed, and on the same formulas Fuelwright uses to plan your week.
- Calculator Carbs per hour How many grams of carbohydrate to eat per hour on a ride, run, or swim. > ride 2:30 · endurance · FTP 250 W 60 g/hr · 150 g total open →
- Calculator Calories burned cycling Calories from average power, kJ, or TSS and FTP, gross and net of resting. > ride 2:00 · 200 W 1,440 kJ · 1,434 kcal open →
- Calculator Critical power Your critical power and W' from two or three all-out efforts, plotted. > 3:00 @ 360 W · 12:00 @ 285 W CP 260 W · W' 18.0 kJ open →
- Calculator FTP Your FTP and power zones from a 20-minute, ramp, 8-minute, or hour test. > 20-minute test · 280 W FTP 266 W open →
- Guide intervals.icu nutrition How your intervals.icu workouts become calorie, macro, and carb targets. > sync intervals.icu planned + completed → targets open →