RacePace: Running Calculator

One recent 5K tells you your marathon time. Plan every split, print a pace band, and train in your own heart-rate zones.

Enter any two of distance, time, or pace. RacePace solves the third instantly and shows your speed beside it.

No accounts, no ads, no tracking, and no limits on the free tools.

FREE, WITH NO PAYWALL • Solve for distance, time, or pace from the other two • Even-pace splits for every kilometre or mile • A full unit converter between metric and imperial • Unlimited saved favourites • Unlimited calculations

RACEPACE PREMIUM Unlock the planning and race-day tools.

Split Strategy Planner Build an even, negative, or positive split strategy. Dial in exactly how hard to finish. Hand-edit any single split and the rest rebalance to hold your goal time.

Race Time Predictor Enter one recent result and get finish times for every standard distance from a mile to the marathon. RacePace uses the Riegel endurance model, so a 5K time gives a realistic marathon prediction rather than the same pace stretched across 42 kilometres.

Heart-Rate Training Zones Turn your maximum and resting heart rate into five personal zones, from recovery to maximum, so every run targets the right effort. Enter your numbers by hand or import them from Apple Health.

Printable Pace Bands Export a clean, wristband-style pace band with your checkpoint times to print and wear on race day, or a full split sheet. Share or print either one straight from the app.

PRIVACY RacePace has no accounts, no analytics, no advertising, and no tracking. Your favourites and calculations are stored only on your device. The training zones feature can read your heart rate from Apple Health, but only with your permission, and it is never uploaded or shared.

RacePace does not record runs or use your location. It is a calculator and planner, not a tracker.

Privacy Policy: https://www.jourjourapp.com/racepace/racepace-privacy/ EULA: http://www.apple.com/legal/itunes/appstore/dev/stdeula