Free tools
Training calculators for serious endurance athletes
Free, no-signup tools to compute the numbers that actually drive adaptation: pace targets, VDOT, heart-rate zones, FTP. Same formulas CoachUpFit uses inside the adaptation engine — exposed publicly so you can do the math yourself.
Pace calculator
Compute total time from distance + pace, or pace from distance + time. See splits at 1 km, mile, 5K, 10K, half-marathon, and marathon.
VDOT calculator
Get your Jack Daniels VDOT from any race result, plus Easy, Marathon, Threshold and Interval training paces, and predicted times at other race distances.
Heart-rate zones
5 training zones from age (Tanaka or Fox formula) or your tested max HR. Karvonen reserve method when you add resting HR.
FTP calculator
Compute FTP from a 20-minute test or a ramp test, plus the 7 Coggan power zones and your W/kg ratio.
Want the calculators built into your training plan?
CoachUpFit auto-applies your VDOT, HR zones, and FTP to every session — and re-calibrates them after each field test. Start your free 7-day trial.