Running Pace Calculator

How to use this running pace calculator

Select what you want to calculate: finish time, pace, or distance. Then enter the other two known values. For example, if you ran 10 km in 50 minutes, switch to "Pace" mode and the calculator will show your pace was 5:00 per kilometre (or 8:03 per mile).

The results automatically include race projection times — the expected finish time at your current pace for distances from 1 mile to the full marathon. This helps you gauge fitness and set realistic race goals.

Pace vs speed — which should you use?

Pace (minutes per kilometre or mile) is the standard measure for most runners because it directly answers "how fast should I run each kilometre?" Speed (km/h or mph) is more intuitive for cycling and driving comparisons. This calculator shows both.

A 5:00/km pace equals 12.0 km/h. A 9:00/mi pace equals 10.6 km/h. Converting between the two is straightforward: speed (km/h) = 60 ÷ pace (min/km).

Using race projections

The projected race times assume you maintain the same pace for the full distance — an "even split" strategy. In practice, marathon pace is typically slower than 5K pace for the same runner due to the physiological demands of longer events. Use these projections as a starting point for race planning, not as definitive predictions.