Running pace is the time it takes to cover one unit of distance — expressed as minutes per mile (min/mi) or minutes per kilometer (min/km). This calculator solves all three pace problems in one tool: find your pace from a known distance and duration, project a finish time for a target race, or calculate how far you ran in a given time.
The formula
Pace, time, and distance are related by simple division:
pace (min/unit) = total time (min) ÷ distance
finish time (min) = pace (min/unit) × distance
distance = total time (min) ÷ pace (min/unit)
To convert between min/mile and min/km: divide by 1.60934 (or multiply by 0.62137). To convert pace to speed: speed (units/hr) = 60 ÷ pace (min/unit).
Practical examples
Example 1 — Find pace from a recent run: You ran 5 miles in 47 minutes and 30 seconds (47.5 minutes total). Pace = 47.5 ÷ 5 = 9:30 min/mile (= 5:54 min/km).
Example 2 — Project a half marathon finish time: Your training pace is 10:15 min/mile. Race distance: 13.1 miles. Time = 10.25 × 13.1 = 134.3 minutes = 2 hours 14 minutes 18 seconds.
Example 3 — Find distance from a timed run: You ran for 45 minutes at a 9:00 min/mile pace. Distance = 45 ÷ 9 = 5.0 miles (= 8.05 km).
Common mistakes
Confusing pace and speed. Pace is time per distance (9:00/mi); speed is distance per time (6.7 mph). They're reciprocals — a faster runner has a lower pace number and a higher speed number.
Forgetting seconds in the total. A run of 47 minutes 30 seconds is 47.5 minutes, not 47. Enter the hours, minutes, and seconds fields separately to avoid arithmetic errors.
Applying one unit's pace to another unit's distance. A 6:00 min/km pace is not the same as 6:00 min/mile. 6:00 min/km ≈ 9:39 min/mile. Use the unit toggle to stay consistent.
Averaging paces arithmetically. Two segments of 8:00 min/mile and 10:00 min/mile do not average to 9:00 min/mile unless the distances are equal. If one segment is twice as long, it should be weighted accordingly.
International and regional variations
| Region | Preferred unit | Common race distances |
|---|---|---|
| United States | min/mile | 5K (3.107 mi), 10K, half marathon (13.1 mi), marathon (26.2 mi) |
| United Kingdom | min/mile | Same standard distances |
| Europe / Australia | min/km | Same standard distances (5 km, 10 km, 21.1 km, 42.2 km) |
| Track running (worldwide) | min:sec per lap (400 m) | 400 m, 800 m, 1500 m, 5000 m, 10,000 m |
Quick reference
| Pace (min/mi) | Pace (min/km) | Speed (mph) | Speed (km/h) |
|---|---|---|---|
| 6:00 | 3:44 | 10.0 | 16.1 |
| 7:00 | 4:21 | 8.6 | 13.8 |
| 8:00 | 4:58 | 7.5 | 12.1 |
| 9:00 | 5:35 | 6.7 | 10.7 |
| 10:00 | 6:13 | 6.0 | 9.7 |
| 11:00 | 6:50 | 5.5 | 8.8 |
| 12:00 | 7:27 | 5.0 | 8.0 |
| 13:00 | 8:04 | 4.6 | 7.4 |