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Running Pace Calculator

Race finish times, split tables and a predictor for other distances.

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Target pace

Pace

Finish times at this pace

DistanceFinish time

Splits

MarkerSplitElapsed

Predict from a recent race

Riegel's formula, the standard endurance model.

Finish time
5K—
10K—
Half marathon—
Marathon—

Marathon predictions from short races usually flatter — that distance is limited by endurance and fuelling as much as by speed.

Quick Tool Overview

The Running Pace Calculator turns a target pace into finish times for every standard race distance at once, with a split table showing the time to cross each kilometre or mile. A race predictor works the other way, estimating your times at other distances from a recent result.

What it does
Calculates race times, splits and predictions from a pace or result
You give it
A target pace, or a recent race time and distance
You get back
Finish times, a full split table and predicted times
Best for
5K, 10K, half marathon and marathon training and race day
Calculators Free, unlimited use No sign-up Runs in your browser

About the Running Pace Calculator

Set a target pace and see your finish time for every standard race distance at once: 5K, 10K, half marathon and marathon, plus the mile and any custom distance. A split table lists the time you should cross each kilometre or mile to stay on target.

The race predictor works the other way. Enter a recent result and it estimates your times at other distances using Riegel's formula, the standard endurance model that scales time by distance to the power of 1.06. It is a good guide between adjacent distances, though it tends to flatter marathon predictions from short-race results, since the marathon is limited by endurance and fuelling as much as by speed.

Key features of the Running Pace Calculator

Every standard distance at once

5K, 10K, half marathon, marathon, the mile and any custom distance from a single pace.

Split table

The time you should cross each kilometre or mile to stay on target, which is what you actually race to.

Riegel race predictor

The standard endurance model, scaling time by distance to the power of 1.06, applied to a recent result.

Honest about the prediction

It is a good guide between adjacent distances but tends to flatter marathon predictions from short-race results.

Custom distances

Parkruns, ultras and odd race lengths are handled alongside the standard ones.

How to use the Running Pace Calculator

  1. 1

    Enter a target pace

    Set minutes and seconds per kilometre or mile, and every standard race time is calculated.

  2. 2

    Read your splits

    The table lists the cumulative time at each kilometre or mile marker so you can pace a race.

  3. 3

    Predict from a recent race

    Enter a distance and finish time you have actually run to estimate your times at other distances.

Frequently asked questions

About 5:41 per kilometre, or 9:09 per mile, held for the full 42.2 kilometres. Enter that target time and the calculator gives the exact pace and full split table.

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