Calculator guide

Running Pace and Race Time Calculators

Plan race projections, interval sessions, VO2 max estimates, swim splits, and pace checks from one performance cluster. This hub is organized for runners planning races, intervals, and training targets, with calculators grouped so related formulas reinforce each other.

Race Time Projection Riegel Calculator Project a race time for a target distance using the Riegel formula. Useful for 5K, 10K, half marathon, and marathon planning.

Interval Session Total Time Calculator Calculate total interval workout time from interval length and number of intervals. Fast planning for running, cycling, swimming, and circuits.

VO2 Max Running Calculator Estimate VO2 max from the Cooper 12-minute run distance. Includes formula, example, and interpretation notes.

Swim Pace Calculator Calculate average swim pace from distance and total time. Useful for pool, open-water, triathlon, and endurance pacing.

Swim Split Per 100m Calculator Calculate swim split time per 100 meters from total distance and total time. Useful for pool pacing and race planning.

Goals Against Average Calculator Calculate goalie goals against average from goals allowed and minutes played. Includes formula, example, and interpretation.

How to use this cluster

Start with the calculator that matches your exact search, then use the related tools to validate the result from another angle.
Use the worked examples on each calculator page as teacher/student resources or quick explainers.
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