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Pace Calculator

Calculate pace, time or distance and check your splits on a 400m track. The runner's essential tool.

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Race Time Predictor

Enter a recent result and estimate your times at other distances with the Riegel and VDOT methods compared.

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Training Paces

Get your paces by zones (easy, marathon, threshold, interval and repetition) from a recent result.

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Heart Rate Zones

Calculate your heart rate zones to train by heart rate, using the % max HR and Karvonen methods.

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Pace Converter

Instantly convert between min/km, min/mile, km/h and mph. With a conversion table of the most common paces.

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VO2max Estimator

Estimate your VO2max from a recent result with Daniels' VDOT method, with your level and equivalent times.

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Race Carbohydrates

Calculate how many carbs to take per hour based on duration and translate it into gels, drink and real food.

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