[ free.tools ]

Predict your 5K, 10K, half, or marathon time from a recent race using Riegel's formula. Free running race time

Convert a distance and time into pace per kilometre and per mile, plus speed in km/h and mph. Free running pac

Calculate your Critical Swim Speed from a 400m and 200m time trial, then get your swim training paces per 100m

Enter a recent race time and get your VDOT score plus easy, marathon, threshold, interval, and repetition pace

Estimate your FTP from a 20-minute, 8-minute, or ramp test, then get your seven cycling power zones in watts.

Calculate Training Stress Score from your duration, power, and FTP, plus your intensity factor. Free TSS calcu

Estimate your one rep max from any set, plus a full percentage table for programming your lifts. Free 1RM calc

Find your true strength level. Compare your squat, bench, and deadlift 1RM to standards from 80M+ lifts, with

Calculate your Wilks score and modern DOTS points from your body weight and total. Compare strength fairly acr

Calculate your five heart rate training zones from max HR, or the more personalised Karvonen method with resti

Estimate your VO2 max from the Cooper 12-minute run test. Free VO2 max calculator, no lab, no sign-up. Plus ho

Calculate your daily calories and protein, fat, and carb targets from your body stats, activity, and goal. Fre

Work out your sweat rate in litres per hour from a simple weigh-in, then learn exactly how much to drink on yo