Running Pace Calculator
Calculate required pace per mile and kilometer to hit target finish times across 5K, 10K, Half Marathon, and Marathon race distances.
Recommended Tools & Equipment
Tested hardware and components for high reliability
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.