How Running Pace Is Calculated
Running pace is the time taken to cover a unit of distance — typically expressed as minutes per kilometer (min/km) or minutes per mile (min/mi). The pace, distance, and time triangle allows you to calculate any one value when you know the other two.
Pace Formulas
Pace (sec/km) = Total Time (sec) / Distance (km)
Finish Time = Pace (sec/km) × Distance (km)
Distance = Total Time / Pace
Common Race Pace Reference
| Pace (min/km) | 5K Time | 10K Time | Half Marathon | Marathon |
|---|---|---|---|---|
| 4:00/km | 20:00 | 40:00 | 1:24:24 | 2:48:48 |
| 5:00/km | 25:00 | 50:00 | 1:45:29 | 3:30:58 |
| 6:00/km | 30:00 | 1:00:00 | 2:06:35 | 4:13:10 |
| 7:00/km | 35:00 | 1:10:00 | 2:27:41 | 4:55:21 |
Frequently Asked Questions
Speed (km/h) = 60 / Pace (min/km). Example: 5:00/km pace = 60/5 = 12 km/h. For miles: Speed (mph) = 60 / Pace (min/mile). A 9:00/mile pace = 60/9 = 6.67 mph.
A beginner completing their first 5K in 30–40 minutes (6:00–8:00/km or 9:40–12:52/mile) is doing well. Most beginners aim to run the entire distance without walking rather than focusing on pace. After 6–12 months of consistent training, many runners reach the 25–30 minute range.
Negative splitting means running the second half of a race faster than the first half. It's the strategy used by most elite marathon runners and is generally considered optimal — it avoids early-race blowup and allows a strong finish. Most recreational runners naturally positive split (start too fast, slow down).
Elite runners slow approximately 10–15% from 5K to marathon pace. Recreational runners often slow 15–30% due to differences in training volume and aerobic base. As a rough guide: if your 5K pace is 5:30/km, your marathon pace might be 6:15–7:00/km depending on fitness.