Tool
Inputs → outputs
This page is intentionally practical: get numbers first, then read the how-to.
Inputs
- • Distance (km/mi)
- • Finish time (hh:mm:ss)
- • Split every (km/mi) (optional)
Outputs
- • Pace per km
- • Pace per mile
- • Split table
Examples
Calculator
Running pace + splits
Enter distance and finish time. Get pace per km/mile and a simple splits table.
Same unit as distance.
Pace / km
Pace / mile
Total time
| Split | Distance (km) | Elapsed |
|---|---|---|
| 1 | 1 | 5:00 |
| 2 | 2 | 10:00 |
| 3 | 3 | 15:00 |
| 4 | 4 | 20:00 |
| 5 | 5 | 25:00 |
| 6 | 6 | 30:00 |
| 7 | 7 | 35:00 |
| 8 | 8 | 40:00 |
| 9 | 9 | 45:00 |
| 10 | 10 | 50:00 |
Assumptions: steady pacing; no terrain/wind adjustments. Use this to plan, then calibrate by effort in real conditions.
Assumptions
What this tool assumes
- • You run at a steady average pace (real races have pacing variation).
- • Splits are calculated on flat ground with no wind/terrain adjustments.
Limitations
What can break it
- • Does not adjust for heat, hills, wind, crowding, or fatigue drift.
- • Race-day execution is effort-driven; use splits as a planning guide, not a rigid script.
Related
Use this with a plan
Coaching beta
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FAQs
Should I pace evenly or negative split?
For most runners, a gentle negative split works best: start controlled, settle, then accelerate only if effort stays stable after 30K.
What pace should I use in training?
Train by effort zones and purpose: easy runs easy, workouts controlled, long runs mostly easy. Use this tool to translate goals into splits.
Why do my race splits drift?
Heat, hills, crowding, and fatigue drift all compound. Plan with splits, execute by effort and hydration/fueling.
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