10K Pace Calculator
Planning for a 10K race? Enter your target finish time to see the pace you need to hold, or plug in a recent 5K time to predict your 10K performance using the Riegel formula. The calculator shows your splits at every kilometer so you can stay on track during the race.
The 10K (6.214 miles) is one of the most popular road race distances, long enough to require genuine endurance but short enough to race at a strong pace. Finishing times vary widely: elite runners complete a 10K in under 30 minutes, competitive club runners aim for 35-45 minutes, and recreational runners typically finish between 50 and 70 minutes.
When predicting a 10K time from a 5K result, this calculator uses the Riegel formula: T2 = T1 x (D2/D1)^1.06. The exponent of 1.06 accounts for the natural slowdown as race distance increases. For example, a 24-minute 5K runner would predict roughly a 49:45 10K, not simply double the 5K time. The formula is most accurate when the input race was run at full effort within the past few weeks.
For race day pacing, even splits (running each kilometer at the same pace) are generally the most efficient strategy. Going out too fast in the first 2-3 km is the most common mistake, leading to a painful slowdown in the second half. If anything, a slight negative split strategy -- running the second half a few seconds per km faster -- produces the best results for most runners.
Tip: Your 10K race pace is also a useful reference for training. Tempo runs are typically done at about 15-20 seconds per km slower than 10K pace, while interval training is done at about 10-15 seconds per km faster than 10K pace.