100 km Running Pace Calculator
Work out the pace you need to finish a 100 km run in a target time. Enter your finish time in minutes (7.5 means 7 minutes 30 seconds) to see pace…
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Work out the pace you need to finish a 100 km run in a target time. Enter your finish time in minutes (7.5 means 7 minutes 30 seconds) to see pace per kilometre, pace per mile and average speed.
For general information only, not medical advice. Consult a qualified health professional before making health decisions.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
With the default inputs (target finish time = 780 minutes), the results are: pace per km 7.80 min/km; pace per mile 12.55 min/mile; average speed 7.69 km/h.
Quick reference: target finish time vs result
Reference table based on the example values; it is not your calculation result.
| Target finish time (minutes) | Pace per km | Pace per mile | Average speed |
|---|---|---|---|
| 390 | 3.90 min/km | 6.28 min/mile | 15.38 km/h |
| 780 | 7.80 min/km | 12.55 min/mile | 7.69 km/h |
| 1,560 | 15.60 min/km | 25.11 min/mile | 3.85 km/h |
| 3,900 | 39.00 min/km | 62.76 min/mile | 1.54 km/h |
| 7,800 | 78.00 min/km | 125.53 min/mile | 0.77 km/h |
| 15,600 | 156.00 min/km | 251.06 min/mile | 0.38 km/h |
Frequently asked questions
What formula does this calculator use?
Pace per km = t ÷ dist; Pace per mile = t ÷ dist × 1.609344; Average speed = dist ÷ t × 60. Variables: t = target finish time in minutes. Fixed values: dist = 100.
What do I need to enter?
You need target finish time (minutes). Results update as you type.
What is an example result?
With the default inputs (target finish time = 780 minutes), the results are: pace per km 7.80 min/km; pace per mile 12.55 min/mile; average speed 7.69 km/h.
What distance is a 100 km?
This calculator uses 100 km for a 100 km.
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