Finish Time Calculator
Work out your race finish time from a target pace and distance, for 5K, 10K, half marathon, marathon or any custom distance, in km or miles.
Finish time is pace multiplied by distance. At 5:00 per kilometre a 10K takes 50:00, a half marathon 1:45:29 and a marathon 3:30:59. At 6:00 per kilometre those become 1:00:00, 2:06:35 and 4:13:10. Enter your own pace below, or read the full table further down.
At this pace you cover 10.91 km every hour.
The finish time calculator answers a simple planning question: if I hold this pace, when do I cross the line? Pick a distance from the presets or type your own, set the pace you plan to run, and read the projected finish in hours, minutes and seconds. It is the tool to reach for when you already know the effort you can sustain and want to see what it adds up to over 5K, 10K, a half marathon, a marathon, or any custom distance.
One pace, every standard distance
The calculator answers for one distance at a time. This table answers for all of them at once: pick the pace you can hold and read the finish time it produces at each standard race distance, so you can see at a glance which race that pace suits.
| Pace / km | Pace / mile | 5K | 10K | 15K | 10 mile | Half | Marathon |
|---|---|---|---|---|---|---|---|
| 3:30 /km | 5:38 /mi | 17:30 | 35:00 | 52:30 | 56:20 | 1:13:50 | 2:27:41 |
| 4:00 /km | 6:26 /mi | 20:00 | 40:00 | 1:00:00 | 1:04:22 | 1:24:23 | 2:48:47 |
| 4:30 /km | 7:15 /mi | 22:30 | 45:00 | 1:07:30 | 1:12:25 | 1:34:56 | 3:09:53 |
| 5:00 /km | 8:03 /mi | 25:00 | 50:00 | 1:15:00 | 1:20:28 | 1:45:29 | 3:30:59 |
| 5:30 /km | 8:51 /mi | 27:30 | 55:00 | 1:22:30 | 1:28:31 | 1:56:02 | 3:52:04 |
| 6:00 /km | 9:39 /mi | 30:00 | 1:00:00 | 1:30:00 | 1:36:34 | 2:06:35 | 4:13:10 |
| 6:30 /km | 10:28 /mi | 32:30 | 1:05:00 | 1:37:30 | 1:44:36 | 2:17:08 | 4:34:16 |
| 7:00 /km | 11:16 /mi | 35:00 | 1:10:00 | 1:45:00 | 1:52:39 | 2:27:41 | 4:55:22 |
| 7:30 /km | 12:04 /mi | 37:30 | 1:15:00 | 1:52:30 | 2:00:42 | 2:38:14 | 5:16:28 |
| 8:00 /km | 12:52 /mi | 40:00 | 1:20:00 | 2:00:00 | 2:08:45 | 2:48:47 | 5:37:34 |
Gun time, chip time and the time on your watch
A predicted finish is a duration. A result sheet may report two of them. Gun time runs from the starting signal for everyone, chip time from the moment you personally crossed the mat, and in a large field those can differ by several minutes. Qualifying standards and cut-offs are frequently published against gun time even though your personal best is usually recorded as chip time, so it is worth checking which one a race uses before planning against a number this calculator produced.
Then there is the third time, the one on your watch. That is a duration too, but over a distance your watch measured rather than the one the course was certified at. Certified road courses are measured along the shortest legal route through the whole course. Nobody runs that route: you take wide corners, you move around other runners, you cross to an aid station. Every one of those adds distance the certificate does not count, which is why a marathon watch reading of 42.4 km is normal rather than evidence of a long course. The methodology page covers how courses are measured.
Turning a goal into a plan
A finish time on its own is a target, not a plan. Once you have the number you want, move on to the splits calculator to break it into kilometre or mile segments, so you know exactly what your watch should read at each marker. If you are not yet sure what pace is realistic, start from a recent result in the race time predictor, which uses Riegel's formula to estimate an equivalent time. To explore the relationship between pace, time and distance more freely, the main pace calculator lets you solve for any of the three.
What this calculator assumes
It assumes you hold the pace you entered for the entire distance, on the flat, without stopping. That is a modelling choice, not a prediction about your race. Hills, wind, aid stations and fatigue all move the real number, and none of them are in here. For a fade-adjusted estimate built from a result you actually ran, use the race time predictor instead, and read what it gives you alongside the caveats on the methodology page.
Frequently asked questions
How do I calculate a race finish time?
Multiply your target pace by the race distance. For example, 5:00 min/km over 10 km gives a 50:00 finish. This calculator does the multiplication and shows the result in hours, minutes and seconds.
What finish time is 5:00 min/km over a marathon?
A marathon is 42.195 km, so 5:00 min/km predicts about 3:30:59. Small pace changes add up over the distance, which is why goal pacing matters so much in longer races.
Can I enter pace in min/mile?
Yes. Switch the pace unit to min/mile and the distance unit to whatever you prefer. The calculator converts internally, so mixing units still gives a correct answer.
Does it account for hills or fatigue?
No. It assumes you hold the chosen pace evenly for the whole distance. For a fade-adjusted estimate from a real result, use the race time predictor instead.
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Last reviewed . Formulas, constants and sources: methodology. Changes to any calculation are logged in the changelog.