How are pace and speed calculated?
Pace is elapsed time divided by distance. Speed is distance divided by elapsed time. The system converts between kilometres and miles automatically.
Walking & Running Pace Calculator
Convert pace, speed, distance, and finish time, then build race projections and cumulative splits.
Workspace
Walk or run details
Choose what you know
Switching modes or units carries the current calculated activity across, so the physical distance, pace, and finish time stay aligned.
Constant-pace estimates
Predicted finish times
| Distance | Predicted time |
|---|---|
| 1 mile | 9:39 |
| 5K | 30:00 |
| 10K | 1:00:00 |
| Half marathon | 2:06:35 |
| Marathon | 4:13:10 |
These are direct constant-pace projections, not performance forecasts. Longer events normally involve different pacing, fatigue, terrain, weather, and stops.
Pacing plan
Cumulative splits
| Split | Segment | Cumulative distance | Segment time | Cumulative time |
|---|---|---|---|---|
| 1 | 1 km | 1 km | 6:00 | 6:00 |
| 2 | 1 km | 2 km | 6:00 | 12:00 |
| 3 | 1 km | 3 km | 6:00 | 18:00 |
| 4 | 1 km | 4 km | 6:00 | 24:00 |
| 5 | 1 km | 5 km | 6:00 | 30:00 |
GuideHow to use
- Choose finish time, pace, or speed as the value you know, then select a common distance or enter your own.
- Switch modes or units freely; the calculator converts the current activity instead of replacing it with unrelated defaults.
- Review equivalent pace, speed, finish time, and clearly labelled constant-pace projections.
- Choose a split interval to build a cumulative pacing table and download it as CSV.
HelpFrequently asked questions
Can I use this for walking?
Yes. The same distance, pace, speed, and time relationships apply to walking, jogging, and running.
How accurate are the predicted race times?
They are simple constant-pace estimates. They do not account for fatigue, terrain, weather, stops, or differences between training and race conditions.
What happens when I switch units or calculation modes?
The current physical distance and calculated performance are converted into the new unit or input mode. For example, switching 5 kilometres to miles shows about 3.107 miles rather than changing the activity to 5 miles.
What is a cumulative split?
A split shows the time for one segment and the total elapsed time at the end of that segment. The final row can be shorter when the activity distance is not an exact multiple of the selected interval.
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