Free running tools
RunMorph running calculators
Pace, VO₂max, training zones, race time predictions, splits… Free tools, no sign-up needed, in miles or kilometers, built on the same method (VDOT, Jack Daniels) that powers our training plans.
Pace & time
Convert, calculate and predict your paces, speeds and finish times.
Pace chartPace ⇄ speed ⇄ finish time for 5K, 10K, half and marathon.Open the tool Pace ⇄ speed converterSwitch between pace (min/mi or min/km) and speed (mph or km/h).Open the tool Pace calculatorEnter two of three values, we work out the third.Open the tool Race time predictorFrom a recent race, estimate your times over other distances.Open the tool Race splitsYour mile-by-mile splits, ready to print for race day.Open the tool
Physiology & zones
Maximal aerobic speed, VO₂max, training zones and heart rate.
MAS calculatorYour maximal aerobic speed and training paces, Jack Daniels method.Open the tool VO₂max calculatorEstimate your VO₂max from a race time (VDOT) or your MAS.Open the tool Training zonesYour 7 pace zones and their heart-rate equivalents.Open the tool Max HR & heart-rate zonesEstimated max heart rate and your 5 heart-rate zones (Karvonen included).Open the tool
Trail & elevation
Effort-km and the real difficulty of a course.
Handy calculators
Calories, treadmill running and body mass index.