FREE RUNNING TOOLS
Find your pace. Plan your next run.
Eight free tools for your next run: pace, race splits, predictions, heart-rate zones, efficiency, drift, weekly volume and photo cards. No account required.
Running pace calculator
Turn distance and time into a useful pace. Or work backwards from the pace you want to run.
Open toolRace splits calculator
Break your target time into readable splits. Include the finish, even when the last kilometer or mile is incomplete.
Open toolRace time predictor
Use a recent race to explore equivalent times at other distances. Keep the estimate alongside your actual preparation.
Open toolHeart-rate zone calculator
Compare percentage-of-maximum and heart-rate-reserve zones using your own heart-rate values.
Open toolRunning efficiency calculator
Put pace and heart rate together, with clearly stated units.
Open toolAerobic decoupling calculator
See how the pace-to-heart-rate relationship changes between two comparable halves.
Open toolMarathon volume review
Review your recent distance history before deciding what the next week should look like.
Open toolRunning photo share-card maker
Your photo. Your run. A clean image ready to save and share.
Open tool