Health
Pace Calculator
Pick what to solve for, then enter any two of distance, time, and pace. The calculator returns the missing value plus speed in mph and km/h. Presets for 5K, 10K, half marathon, and marathon.
Solve for
Race / distance preset
Unit
hh:mm:ss, mm:ss, or seconds. · e.g. 25:00 or 1:42:30
Pace
8:03 /mi • 5:00 /km
Pace is reported per mile and per kilometer for direct comparison with race-day signage. Speed (mph and km/h) is the inverse view of the same number.
Examples
5K in 25:00
8:03 /mi · 5:00 /km
Half marathon at 5:41 /km
≈ 1:59:55 finish
10K at 6:00 /mi
≈ 37:17 finish
60 minutes at 7:30 /mi
≈ 8.0 miles
How it works
Pace, time, and distance are three quantities tied by one relationship. Given any two, the third is determined.
Pace · pace = time / distance
Time · time = pace × distance
Distance · distance = time / pace
Speed = 60 / pace (min/mi → mph) or 60 / pace (min/km → km/h).
Related health and unit calculators
- Target heart rate calculator for training-zone heart rates that pair with pace.
- Calories burned calculator for an estimate of energy spent at the pace and duration you ran.
- Time calculator for adding, subtracting, and comparing time durations.
- Speed converter for switching between mph, km/h, m/s, ft/s, and knots.
- All health calculators.
Frequently asked questions
Pace is time divided by distance, the inverse of speed. Runners and walkers usually express pace in minutes per mile or minutes per kilometer; a 9:00 /mi pace means it takes 9 minutes to cover one mile.
Speed is distance divided by time. Convert pace (min/mi) to mph by dividing 60 by the pace in decimal minutes. The calculator does this automatically and shows mph and km/h alongside the pace.
Roughly 9:09 /mi or 5:41 /km. Use the 'Time from distance + pace' mode with the Half preset to confirm. Race-day pace varies with terrain, weather, and pacing strategy.
Easy pace is roughly 60 to 75 seconds slower per mile than your 5K race pace. It is the pace at which you can hold a conversation. This calculator handles the math; pace targets come from your training plan.
Type hh:mm:ss (e.g. 1:42:30), mm:ss (e.g. 25:00), or just seconds. The calculator parses any of the three.
The math works for any sport. Pace is just time / distance. For cycling, mph or km/h are more conventional; the speed-converter is a better fit for sustained efforts.
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