Marathon Time Predictor

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(min)
min
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Race Time Predictor (Riegel Formula) Estimate race finish time at a new distance using the Riegel formula and a known performance. Marathon Splits Calculator Convert a marathon goal time into per-kilometer pace and checkpoint splits for race-day pacing. VDOT Calculator (Jack Daniels) Estimate running fitness (VDOT) from race performance using Jack Daniels's Running Formula equations. Continue in Guided Mode Run any calculator step by step. Your values carry across every tool in the session.

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