🏅Free Running Tools
Running PaceCalculator
Science-backed calculators to find your optimal training paces, predict race times, and plan your marathon strategy. Built for runners, by runners.
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VDOT Calculator
Jack Daniels' Running Formula
Enter a race result to find your VDOT, get personalized training paces, and predict equivalent race times.
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Hanson Paces
Hanson Marathon Method
Calculate training paces based on your goal marathon time using the Hanson method — Easy, Long Run, Tempo, Strength, and Speed intervals.
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Marathon Pace
Pace & Split Calculator
Calculate your pace per km/mile for any race distance, view projected split times, and visualize your race strategy.
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Why PaceCalculator.xyz?
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Visual Results
Color-coded training zones with intuitive pace visualization
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Unit Switching
Seamlessly switch between kilometers and miles
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Auto-Save
Your inputs are saved locally for quick access next time