Loading Legacy
Finish Time
29:31
Pace / Mile
9:30 /mi
Pace / KM
5:54 /km
Speed
6.32 mph
Speed
10.16 kph
Mile Splits
Running Pace Calculator converts between pace per mile, pace per km, and speed in mph/kph, and calculates race finish times for 5K, 10K, half marathon, and marathon from your input pace or distance and goal time.
Running Pace Calculator is a high-performance utility designed to help users streamline their workflow. Built with modern web technologies, it ensures fast processing times and high-quality outputs directly in your browser.
Pace-to-time: finish time = pace (sec/mile) × distance (miles). Time-to-pace: pace = total seconds / distance miles. Speed conversions: mph = 3600 / pace_secs_per_mile; kph = mph × 1.60934. Pace/km = pace_per_mile / 1.60934. Race distances used: 5K = 3.10686 miles, 10K = 6.21371 miles, half marathon = 13.1094 miles, marathon = 26.2188 miles. Results are estimates; actual race performance depends on course elevation, weather, and pacing strategy.
Running pace = total time ÷ distance. For example, if you run 3 miles in 27 minutes, your pace is 9:00 per mile. In km: pace = total minutes ÷ km.
A comfortable beginner pace is typically 10:00–12:00 per mile (6:12–7:27 per km). You should be able to hold a conversation. As fitness improves, pace naturally quickens.
A 4-hour marathon requires a 9:09 per mile pace (5:41 per km). A 3:30 marathon needs 8:01/mile. A 3:00 marathon needs 6:52/mile.
Pace per mile = 60 ÷ mph. At 6 mph, your pace is 10:00/mile. At 8 mph, it's 7:30/mile. Treadmill speeds directly translate: set the treadmill to your calculated mph.
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