🏅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.

—Pace Calculators

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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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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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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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—Heart Rate

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Max Heart Rate

220 - Age Formula

Calculate your maximum heart rate using the standard 220 - age formula and view training zones.

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Heart Rate Zones

Karvonen Method

Calculate heart rate training zones using the Karvonen method for personalized intensity targets.

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—Route Planning

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Route Simulator

Map & GPX Export

Create custom running routes on an interactive map, set segment paces, and export GPX files for your GPS watch.

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—Utilities

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Running Cost

Expense Calculator

Track your running expenses — cost per km, monthly and annual spending on shoes and gear.

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Calorie Burn

Energy Calculator

Estimate calories burned during your runs based on weight, distance, pace, and elevation gain.

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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