Running Speed Calculator
Convert between running speed (km/h / mph) and running pace (min/km / min/mile). Calculate your finish time for any race distance. Instant, no sign-up required.
Speed ↔ Pace ↔ Finish Time
Enter any value — results update instantly
Enter either speed (km/h or mph) or pace (min/km or min/mile) — the other will be calculated automatically. The estimated finish time assumes a consistent pace for the full distance.
Common Running Paces and Equivalent Speeds
| Pace (min/km) | Speed (km/h) | Pace (min/mile) | 5km Finish | Half Marathon |
|---|---|---|---|---|
| 4:00 | 15.0 | 6:26 | 20:00 | 1:24:23 |
| 5:00 | 12.0 | 8:03 | 25:00 | 1:45:29 |
| 6:00 | 10.0 | 9:39 | 30:00 | 2:06:35 |
| 7:00 | 8.6 | 11:16 | 35:00 | 2:27:41 |
| 8:00 | 7.5 | 12:52 | 40:00 | 2:48:47 |
| 10:00 | 6.0 | 16:05 | 50:00 | 3:30:59 |
Understanding Running Pace Zones
Most training plans distribute runs across 3–5 intensity zones based on percentage of max heart rate or pace. Easy runs (Zone 2, 60–70% HRmax) should form 70–80% of total weekly running volume — they build aerobic base, promote fat adaptation, and allow recovery between harder sessions. Tempo runs (Zone 3–4, around 10km race pace) train lactate threshold. Interval runs (Zone 4–5, at or above 5km pace) develop VO2max and speed. Beginners often run all their miles too hard and all their fast sessions too slow — pace tracking is the most practical way to ensure proper training distribution.