Running & Endurance Calculators

Essential tools for runners and endurance athletes. Calculate pace, time, distance, race splits, and performance predictions.

16 calculators available

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Calculate your average pace from distance and time

Estimate finish time from distance and pace

Calculate distance covered from time and pace

Plan your marathon strategy with pace and split times

Calculate pace and splits for half marathon distance

Plan your 10K race with pace and split calculations

Calculate pace and splits for 5K races

Predict race times across different distances

See predicted times for multiple standardized distances

Plan your race with faster second half pacing

Calculate overall pace for run/walk intervals

Plan interval training sessions with target paces

Calculate pace-based training zones from threshold

Calculate HR training zones using max HR or age

Estimate VO2max from race performance

Adjust pace and time for elevation gain