Running Pace Calculator
Calculate required pace per mile and kilometer to hit target finish times across 5K, 10K, Half Marathon, and Marathon race distances.
How Running Pace is Calculated
Running pace expresses time required to cover a single unit of distance (minutes and seconds per mile or kilometer):
Core Formulas
Pace (sec/mi) = Total Time (sec) / Total Distance (mi)
Pace (sec/km) = Pace (sec/mi) / 1.60934
Predicting Future Race Times (Riegel's Formula)
Peter Riegel's endurance formula ($T_2 = T_1 imes (D_2 / D_1)^{1.06}$) reliably predicts finish times across distances assuming proper volume base training.
Frequently Asked Questions
What is a sub-20 minute 5K pace?
A sub-20 minute 5K requires an average pace of 6 minutes and 26 seconds per mile (4 minutes flat per kilometer).
What is the required pace for a Boston Marathon qualifier (BQ)?
For men under 35, a BQ (sub-3:00 marathon) requires maintaining a 6:51/mile (4:15/km) pace for 26.2 consecutive miles.
What is a negative split?
Running a negative split means completing the second half of a race faster than the first half. Nearly all world marathon records have been set utilizing negative splits.