Pace Calculator
Calculate running pace, finish time, or distance. Covers 5K, 10K, half marathon, and marathon.
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Common Race Pace Reference
| Pace (min/km) | 5K | 10K | Half | Marathon |
|---|---|---|---|---|
| 4:00 | 20:00 | 40:00 | 1:24:23 | 2:48:46 |
| 5:00 | 25:00 | 50:00 | 1:45:30 | 3:30:58 |
| 6:00 | 30:00 | 1:00:00 | 2:06:35 | 4:13:10 |
| 7:00 | 35:00 | 1:10:00 | 2:27:42 | 4:55:22 |
Pace, Time and Distance
Running performance links three numbers: pace (minutes per mile or km), the distance, and the finish time. Fix any two and the third is determined: pace = time ÷ distance, time = pace × distance, distance = time ÷ pace. Run 5 km in 25 minutes and your pace is 5:00 per km. This calculator solves for whichever value you leave blank.
Race Time Predictions
Knowing your goal pace lets you plan a race. To break 2 hours in a half-marathon (21.1 km) you need to hold about 5:41 per km, or 9:09 per mile. A pace band — your target split at each km or mile — helps you avoid starting too fast, the most common pacing error.
Common Race Distances
| Race | Distance |
|---|---|
| 5K | 5 km / 3.11 mi |
| 10K | 10 km / 6.21 mi |
| Half marathon | 21.1 km / 13.1 mi |
| Marathon | 42.2 km / 26.2 mi |
Frequently Asked Questions
A comfortable beginner pace is 8-10 minutes per kilometer. Maintain a conversational pace — if you cannot talk, slow down.
Multiply pace (min/km) by distance in km. A 5:30/km pace for a 10K = 55 minutes total.
Men 18-34 need sub-3:00 (about 4:16/km). Women 18-34 need sub-3:30 (about 4:59/km). Times vary by age group.