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Miraç Özdemir
Sports & Exercise

Running Pace and Finish Time Calculator

Calculate your running pace per kilometre and average speed from distance and time, or your 5K, 10K, half marathon and marathon finish time from a target pace.

Version 2

Things to keep in mind:

  • The calculation assumes an even pace; elevation, wind, heat, fatigue and stops at water stations change the actual time.
  • GPS watches often measure slightly more than the official course distance, so your real pace may differ from the calculated one.
  • Distances are in kilometres; pace per mile is not calculated.

Calculator

Calculation and distance

What do you want to calculate?

Time or pace

Hours part of the total time.

Minutes part of the total time (0–59).

Seconds part of the total time (0–59).

After the first calculation, the result updates automatically when you change a value.

Result

Enter the values and press Calculate to see the result here.

About this tool

Running pace is how many minutes and seconds you need per kilometre. The calculator works both ways: it finds pace and average speed from distance and total time, or finish time from distance and a target pace. You can choose 5 km, 10 km, half marathon (21.0975 km), marathon (42.195 km) or any custom distance.

Formulas

  • Total time (s) = hours × 3600 + minutes × 60 + seconds
  • Pace (s/km) = total time ÷ distance; minutes = pace ÷ 60 (whole part), seconds = pace mod 60
  • Finish time (s) = pace (s/km) × distance; hours = time ÷ 3600 (whole part), minutes = (time mod 3600) ÷ 60 (whole part), seconds = time mod 60
  • Average speed (km/h) = distance × 3600 ÷ total time

Pace and finish time are first rounded to the nearest whole second and then split into minutes and seconds, so invalid values such as 4:60 never appear.

Example: to run a marathon in 3 hours 30 minutes (12,600 s) you need 12,600 ÷ 42.195 = 298.6 s/km, rounded 4:59/km; average speed is 12.06 km/h. A runner holding 5:30/km over a half marathon finishes in 330 × 21.0975 = 6962 s, i.e. 1:56:02.

How to use

  1. Choose whether to calculate pace or finish time.
  2. Select the distance; for a custom distance enter the kilometres.
  3. For pace enter the total time (hours, minutes, seconds); for finish time enter the target pace (minutes, seconds per km).
  4. Press Calculate.

Notes

Pace and finish time are rounded to the nearest whole second (HALF_UP) and then split into minutes/seconds and hours/minutes/seconds. Speed is rounded to 2 decimal places and computed from the unrounded time. In pace mode a time of 0 gives 0 for every result.

Frequently asked questions

4 questions

  1. It is the time needed to run one kilometre, written as minutes:seconds per km. A pace of 5:00/km means each kilometre takes 5 minutes.

Next step

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