How is pace calculated?

Total time in seconds is divided by the distance to get seconds per kilometre, then shown as minutes and seconds. The per-mile pace multiplies by 1.609344.

Can I enter miles instead of kilometres?

The distance field is in kilometres. Convert miles to kilometres first (1 mile = 1.609 km); the per-mile pace is still shown in the result.

What's the difference between pace and speed?

Pace is time per distance (minutes per km); speed is distance per time (km/h). They describe the same run from opposite directions.

Does it handle long times over an hour?

Yes. Use the hours field for runs over 60 minutes, such as a half marathon or marathon.

How are the cumulative split times calculated?

Each cumulative split multiplies the unrounded average seconds per kilometre by a standard distance, then rounds the elapsed time to the nearest whole second. Only distances inside your entered run are shown.

Can I share a calculation?

Yes. Use Share to copy a link that reopens the calculator with the same distance and time.

Running pace calculator

Enter a distance in kilometres and a finishing time. The calculator shows pace per kilometre and mile, average speed, and even-pace cumulative splits that fit within the distance.

Written by Kenneth Schrøder, Founder of WiseCalcs

Updated August 22, 2026·Sources verified August 22, 2026

Turn a distance and finishing time into average pace, speed, and whole-second cumulative splits for standard distances.

Pace per km

5:30 /km

Pace per mile: 8:51 /mi
Average speed: 10.9 km/h
Split at 1 km: 5:30
Split at 5 km: 27:30

The headline is pace per kilometre. Supporting results show pace per mile, average speed, and cumulative splits at standard distances up to your entered distance.

How does it work?

The per-mile pace multiplies the per-kilometre pace by 1.609344. Split times use unrounded pace and are rounded to whole seconds for display.

Running pace formula

\text{pace} = \frac{\text{total seconds}}{\text{distance}},\quad t_{\text{split}} = \text{pace} \times d_{\text{split}},\quad \text{speed} = \frac{d}{t_{\text{hours}}}

pace: Time per kilometre, shown as m:ss.
d: Distance in kilometres.
t: Total time (hours, minutes, seconds).
speed: Average speed in km/h.
d_split: Standard split distance in kilometres.
t_split: Cumulative split time at a standard distance if average pace is held evenly.

Running 5 km in 27:30 is 1650 s ÷ 5 = 330 s/km, a pace of 5:30 /km and a speed of about 10.9 km/h.

Method & sources

Distance is entered in kilometres; time is split into hours, minutes, and seconds. Pace is the average across the whole distance; displayed cumulative split times assume that exact pace is held evenly from the start. Standard splits are shown only when they fit inside the entered distance: 1 km, 5 km, 10 km, half marathon, and marathon.

Sources

Where this method comes from — use these references to understand the formula, assumptions, and limits.

NIST Guide to the SI, Appendix B.8 — mile to kilometre conversion — National Institute of Standards and Technology, verified 2026-08-22

How we calculate

Distance is entered in kilometres; time is split into hours, minutes, and seconds.
Pace is the average across the whole distance; displayed cumulative split times assume that exact pace is held evenly from the start.
Standard splits are shown only when they fit inside the entered distance: 1 km, 5 km, 10 km, half marathon, and marathon.
The per-mile pace uses 1.609344 km per mile.
Speed is distance divided by the total time in hours.

Rounding

Pace and split times are rounded to the nearest whole second; speed is shown to one decimal. The calculation uses full precision before display rounding.

What this calculator does

Pace is how long it takes to cover one kilometre or mile. This calculator divides your total time by the distance to get the per-kilometre pace, scales it for miles, and works out your average speed in km/h.

How to use it

Enter the distance in kilometres.
Enter the time as hours, minutes, and seconds.
Read your pace per kilometre and per mile.
Check average speed and the available cumulative splits.

A worked example

Running 5 km in 27 minutes 30 seconds is 1650 seconds over 5 km, a pace of 5:30 per kilometre — about 8:51 per mile and roughly 10.9 km/h.

Use average pace for a target

The cumulative splits show when you would reach 1 km, 5 km, 10 km, half marathon, or marathon if you held the calculated average pace evenly. Actual segment splits can be faster or slower while producing the same finish time, so use the list as a pacing reference rather than a record of an uneven run.

Common mistakes

Entering minutes in the seconds field, or vice versa.
Mixing up kilometres and miles for the distance.
Expecting a single average pace to reflect an uneven effort.

When it's useful

After a run to see your pace, or before a race to plan the pace you need for a target finish time.

FAQ

How is pace calculated?: Total time in seconds is divided by the distance to get seconds per kilometre, then shown as minutes and seconds. The per-mile pace multiplies by 1.609344.
Can I enter miles instead of kilometres?: The distance field is in kilometres. Convert miles to kilometres first (1 mile = 1.609 km); the per-mile pace is still shown in the result.
What's the difference between pace and speed?: Pace is time per distance (minutes per km); speed is distance per time (km/h). They describe the same run from opposite directions.
Does it handle long times over an hour?: Yes. Use the hours field for runs over 60 minutes, such as a half marathon or marathon.
How are the cumulative split times calculated?: Each cumulative split multiplies the unrounded average seconds per kilometre by a standard distance, then rounds the elapsed time to the nearest whole second. Only distances inside your entered run are shown.
Can I share a calculation?: Yes. Use Share to copy a link that reopens the calculator with the same distance and time.

Related calculators

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