Running Calculators With the Maths Shown

Solve for pace, finish time or distance from the other two, in min/mile or min/km, with equivalent speeds and finish times for 5K to marathon.

Pick 5K, 10K, half, marathon, a mile or a custom distance, solve for pace, speed or finish time, and get a per-mile or per-km split table for race day.

Convert running pace between minutes per mile, minutes per kilometre, mph and km/h, with a full chart and what each pace means over 5K to marathon.

Turn a marathon or half goal time into the pace you need per mile and per kilometre, with 5K checkpoints, mile splits, and an even or negative-split plan.

A split table for any race distance and goal time: cumulative time at every km or mile, with an optional negative split so the second half runs faster.

Predict your 5K, 10K, half and marathon times from one recent race, using the Riegel formula and Daniels VDOT side by side so you see where they disagree.

Your Jack Daniels VDOT from a race result, with easy, marathon, threshold, interval and repetition training paces, and equivalent times at every distance.

Your age-graded performance percentage and open-class time for 5K to marathon, from published USATF/WMA road age-grading standards by age and sex.

Five training zones from your age and resting heart rate, Karvonen method, with Tanaka and 220-minus-age max-HR compared and what each zone is for.

Convert treadmill speed in mph or km/h to running pace and back, see what an incline is worth as flat pace, and the elevation gain a session adds up to.

Calories burned on a treadmill from your weight, speed, incline and time, using the ACSM walking and running equations rather than the console's guess.

Calories burned running from your weight and pace or distance and time, using the ACSM equation, shown gross and net of what you'd burn sitting still.

Calories burned cycling from your weight, speed and ride time using Compendium of Physical Activities METs, or from average power if you ride with a meter.