Running Pace Calculator
Convert running distance and finish time into pace per kilometre, pace per mile, speed and projected finish times.
Calculate running pace
Enter distance and elapsed time to calculate pace, speed and common-distance projections at the same pace.
| Distance | Same-pace finish |
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Running pace formula
Running pace is elapsed time divided by distance. The calculator converts the entered route into kilometres, calculates seconds per kilometre, and then converts that pace into seconds per mile and average speed.
Pace versus speed
Pace answers “how long does one kilometre or mile take?” Speed answers “how many kilometres are covered in one hour?” Runners often prefer pace because it maps directly to split times.
How race projections are calculated
The projection table simply extends the same average pace to 5K, 10K, half-marathon and marathon distances. It is not a physiological race-prediction model, so it does not account for the normal slowing that can occur over longer distances.
Use moving time consistently
If your recorded activity includes stopped time, decide whether you want elapsed pace or moving pace and enter the matching time. Mixing moving time with total route distance can make comparisons misleading.
Use pace with terrain and effort context
The same pace can represent very different effort on hills, trails, wind, heat or altitude. For race planning, compare pace with recent workouts and course conditions rather than assuming a flat-road conversion predicts performance. GPS devices can also smooth or mismeasure short segments. When precision matters, measured course distance and elapsed chip/manual time provide a stronger basis for pace than an instantaneous watch reading.