10K Pace Calculator
Compute your target 10K pace, explore kilometer-by-kilometer splits, and project potential finish times from a recent 5K benchmark.
Every-Kilometer Race Splits (1K to 10K)
| Kilometer | Pace | Split Time | Cumulative Time |
|---|
Predicting 10K Times: Pete Riegel Formula
When projecting 10K race performance from a shorter 5K distance, doubling your 5K time will underestimate your final finish time due to fatigue accumulation. We utilize the scientifically validated Pete Riegel race prediction model:
Where T₁ is your recent 5K time, D₁ is 5 km, and D₂ is 10 km. The fatigue exponent of 1.06 reflects the physiological reality that speed diminishes by approximately 6% for each doubling of race distance.
Disclaimer: Race predictions are mathematical estimates based on generalized fatigue factors. Realized performance depends on course elevation, weather, fueling, and whether the runner has accumulated sufficient weekly endurance mileage.
Typical Races and World Record Paces
Reference paces across official standard track, middle-distance, and road racing events.
| Category | Men's World Record Pace | Women's World Record Pace |
|---|---|---|
100 meters | 2:35/mile or 1:36/km | 2:49/mile or 1:45/km |
200 meters | 2:35/mile or 1:36/km | 2:52/mile or 1:47/km |
400 meters | 2:54/mile or 1:48/km | 3:12/mile or 1:59/km |
800 meters | 3:23/mile or 2:06/km | 3:48/mile or 2:21/km |
1,500 meters | 3:41/mile or 2:17/km | 4:07/mile or 2:34/km |
| 3:43/mile or 2:19/km | 4:13/mile or 2:37/km | |
| 4:04/mile or 2:31/km | 4:34/mile or 2:50/km | |
| 4:14/mile or 2:38/km | 4:45/mile or 2:57/km | |
Half Marathon(13.11 miles / 21.098 km) | 4:27/mile or 2:46/km | 4:58/mile or 3:05/km |
Marathon(26.22 miles / 42.195 km) | 4:41/mile or 2:55/km | 5:10/mile or 3:13/km |
Values represent official outdoor track and World Athletics certified course records converted into standard min/mile and min/km splits.Convert your custom pace →
10K Pacing FAQs
Practical answers to common pacing, split calculation, and training questions.
What pace do I need to run a sub-50 minute 10K?
How is a 10K time estimated from a recent 5K race?
T10K = T5K × (10 ÷ 5)^1.06 (approximately T5K × 2.085). For example, a runner with a 24:00 5K has an estimated 10K potential of approximately 50:02, assuming adequate aerobic mileage base.How many miles is a 10K road race?
What is a good 10K pace for intermediate runners?
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