Pacing Calculator
Pacing calculator works out Pace and Pace in seconds per unit from Solve for, Distance and Custom distance. The default figures on this page give pace of 5:00; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
3 steps
- Distance 5 km, time 25:00.
- Pace = time / distance = 5:00 per kilometre.
- Speed = 12 km/h (7.46 mph).
Split tabletable
| split | distance | segmentTime | cumulativeTime | pace |
|---|---|---|---|---|
| 1 | 1 | 5:00 | 5:00 | 5:00 |
| 2 | 2 | 5:00 | 10:00 | 5:00 |
| 3 | 3 | 5:00 | 15:00 | 5:00 |
| 4 | 4 | 5:00 | 20:00 | 5:00 |
| 5 | 5 | 5:00 | 25:00 | 5:00 |
Its 5 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
2 sources
What the pacing calculator calculates
Solves for pace, finish time or distance from any two of them, and produces a split table with optional even, positive or negative splitting.
How to use this pacing calculator
Enter Solve for, Distance, Custom distance and Custom distance unit. Pace updates as you type, and “Use a worked example” loads checked figures you can adjust. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Pace, Pace in seconds per unit and Finish time.
The method follows Pace is time divided by distance; speed is its reciprocal. Standard race distances follow World Athletics definitions. and Marathon distance is 42.195 km and the half marathon 21.0975 km by definition..
5 km in 25 minutes example
With Solve for: pace, Distance: 5k, Finish time: 25:00, Pace is measured: per-km, the calculator returns Pace in seconds per unit: 300, Pace: 5:00, Speed: 12. This example is checked against an independent source in the test suite.
What you can compare
Change one input at a time to see how it affects Pace, Pace in seconds per unit and Finish time. The inputs you can vary are Solve for, Distance, Custom distance, Custom distance unit, Finish time and Pace.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How is pacing calculated?
Solves for pace, finish time or distance from any two of them, and produces a split table with optional even, positive or negative splitting. Open “How this is worked out” beside the result to see each step for your own figures.
What is the formula for calculating pace?
Solves for pace, finish time or distance from any two of them, and produces a split table with optional even, positive or negative splitting. On this page it is computed from Solve for, Distance and Custom distance and shown as Pace, Pace in seconds per unit and Finish time.
How can I calculate my pace?
It needs Solve for, Distance, Custom distance, Custom distance unit, Finish time and Pace. Nothing else is required, and the figures stay in your browser.
Is 2 miles in 30 minutes a good pace?
Solves for pace, finish time or distance from any two of them, and produces a split table with optional even, positive or negative splitting. Put your own figures in above and the working updates beside the result. For scale, the default figures on this page give 5:00.
What information do I need for the pacing calculator?
You need Solve for, Distance, Custom distance, Custom distance unit, Finish time, Pace, Pace is measured and Number of splits to show. The page opens with default figures that give pace of 5:00, so you can see the scale before entering your own.
What does this pacing calculator show?
It shows Pace, Pace in seconds per unit, Finish time, Finish time in seconds, Distance, Speed, Pace per kilometre and Pace per mile, with the working and any warnings for your entries.