Tools for smarter running
Practical calculators that turn a target time and training data into clear pacing and useful next steps.
Start with a concrete calculation. Pacero tools are free, run directly in your browser, and help you understand your goal and training more clearly.
Running pace calculator
Calculate pace, target time, speed, race splits and an indicative performance over other distances.
Open toolAvailableHeart rate zone calculator
Calculate Z1–Z5 from maximum heart rate, heart rate reserve or LTHR and understand what each zone is for.
Open toolAvailableRace time predictor
Use one result to estimate a 5K, 10K, half marathon or marathon time — or start with a goal and see the equivalent shorter-distance performance.
Open toolPrefer an explanation to a number?
Pacero guides connect the calculations with practical preparation and training decisions.