Running calculators that answer in the numbers you run by
The pace you need for a goal time, the time a pace gets you, your heart rate zones and what a run actually burned - worked out the same way on every page, in miles or kilometres.
Pick a calculator
- Half marathon pace chartThe pace per mile for every half marathon goal from 1:10 to 3:00.
- Heart rate zonesFive training zones in beats per minute, by heart rate reserve or % of max.
- Marathon pace chartThe pace per mile for every marathon goal from 2:30 to 6:00, with splits.
- Max heart rateYour estimated maximum heart rate by age, from five published formulas.
- Pace calculatorDistance, time or pace - give two, get the third, per mile and per km.
- Running caloriesCalories burned from weight, distance, time and incline, total and net.
How to use it
- Enter what you knowTwo of distance, time and pace, or your age and resting heart rate.
- Read the number you run byPace per mile and per kilometre, split times, zone ranges in beats per minute.
- Take it on the runEvery pace is rounded down to the second, so holding it meets the goal.
Numbers you can hold on race day
A 4:30:00 marathon needs 10:17 per mile, not 10:18 - held for 26.2 miles, 10:18 finishes at 4:30:03. That one second is why every goal pace here rounds down. Splits use the pace you will actually run, zone limits are rounded inward so staying inside them keeps you in the zone, and the formula behind each heart rate figure is named on the page.
For runners in the US
American runners think in minutes per mile, and most road races are measured in kilometres anyway - a 5K, a 10K - so a runner switches units every time they sign up for anything. Treadmills here show speed in miles per hour, which is a third unit for the same effort. The pace tools on this edition start in miles and convert everything else on the spot.