Pace Calculator
Convert running pace between min/mile and min/km — calculates finish time at any race distance from 5K to marathon.
Calcady™ · Calculation Report Pace Calculator calcady.com Race TrackerHR MIN SEC Required Mile Pace 8:14/mi Required Kilometer Pace 5:07/km |
Quick Answer: How Do You Convert Min/Mile to Min/Km?
Divide your min/mile pace by 1.60934. An 8:00 min/mile pace = 8 ÷ 1.60934 = 4:58 min/km. For the reverse, multiply min/km by 1.60934. A 5:00 min/km = 5 × 1.60934 = 8:03 min/mile.
Race Finish Time by Pace
| Pace | 5K | 10K | Half Marathon | Marathon |
|---|---|---|---|---|
| 7:00/mi | 21:44 | 43:29 | 1:31:43 | 3:03:26 |
| 8:00/mi | 24:51 | 49:42 | 1:44:50 | 3:29:41 |
| 9:00/mi | 27:57 | 55:55 | 1:57:58 | 3:55:56 |
| 10:00/mi | 31:04 | 1:02:08 | 2:11:06 | 4:22:11 |
| 12:00/mi | 37:17 | 1:14:33 | 2:37:19 | 5:14:37 |
Times assume even pacing. Real races typically slow 5-10% in the second half due to fatigue, heat, and elevation. Marathon times for first-timers average 15-20% slower than predicted from 5K pace.
Frequently Asked Questions
What is a good running pace for beginners?
Most beginner runners start at 10:00-13:00 min/mile (6:12-8:04 min/km). A conversational pace — where you can speak in complete sentences — is ideal for building aerobic fitness. There's no "too slow" for beginners. Speed develops naturally over months of consistent easy-pace running.
Can I predict marathon time from 5K pace?
Rough estimate: multiply your 5K time by 4.6-4.8 for a trained marathoner, or 5.0-5.5 for a first-timer. A 25:00 5K predicts roughly 1:55-2:00 half marathon and 4:00-4:10 marathon for an experienced runner. However, marathon performance depends heavily on long-run training, fueling strategy, and pacing discipline — not just raw speed.
Why do GPS watches show different pace than treadmills?
Treadmills measure belt speed directly — they're accurate assuming proper calibration. GPS watches measure distance via satellite position, which has ±3-5% error depending on signal quality, tree cover, and building reflections. On tracks and open roads, GPS is very accurate. In cities with tall buildings or dense forest, GPS may under-report distance by 5-8%, making your pace appear slower than reality.