Running Calculators
Pace, race time, and treadmill calculators for runners training for a 5K, half, or full marathon.
Pace Calculator
Find your pace, time, or distance — enter any two and get the third, in miles or kilometers.
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5K Pace Calculator
Find the pace you need to hold to hit a target 5K finish time.
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10K Pace Calculator
Find the pace you need to hold to hit a target 10K finish time.
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Half Marathon Pace Calculator
Find your target pace for a half marathon, with a built-in pace chart by finish time.
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Marathon Pace Calculator
Find your target marathon pace, with an option to negative-split the back half.
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Race Time Predictor
Predict your finish time at a new distance from a recent race result, using the Riegel formula.
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Treadmill Pace Converter
Convert between treadmill speed (mph or km/h) and outdoor running pace.
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