Free calculators and tools to help you train smarter and race faster.
Calculate your target race pace and get detailed km-by-km or mile-by-mile splits for any distance.
Quick reference race pace charts for marathon, half marathon, 10K, and 5K. Compare multiple goal times at a glance.
Convert running pace between min/km, min/mile, and km/h instantly. Includes a full pace reference table.
Instantly convert kilometers to miles and miles to kilometers. Covers all common running distances.
Enter a race time for any distance and see predicted finish times for 5K, 10K, half marathon, and marathon based on your VDOT score.
Calculate your VDOT score from a recent race time and get personalised training paces — easy, marathon, threshold, interval, and repetition.
Full reference table of all VDOT scores from 30 to 85 with equivalent race times and training paces from Daniels' Running Formula.