Pace Calculator
Calculate running pace, finish time, or distance. Enter any two of pace, time, and distance — get the third, plus splits per kilometre and mile.
About this tool
A pace calculator solves for any one of three values — pace, finish time, or distance — given the other two. Pick what you want to find from the Solve for buttons, fill in the two values you know, and the third appears instantly along with your speed and per-kilometre / per-mile splits.
This is the everyday math runners, cyclists, and race directors reach for: planning a target finish time, checking whether a training run hit goal pace, or working out what pace is needed to break a personal record. Distances work in kilometres, miles, metres, or common race lengths (5K, 10K, half marathon, marathon), and pace switches between per-km and per-mile.
Examples: a 10K finished in 0:50:00 is a pace of 5:00 /km (12.0 km/h). A marathon at 4:45 /km predicts a finish of 3:21:17. Running 5:30 /km for 45 minutes covers 8.18 km.
FAQ
How is pace calculated? ›
Pace (time per unit distance) equals total time divided by total distance. This calculator converts everything to seconds per kilometre internally, so mixing units (miles with kilometres) still gives a correct result.
What is the difference between pace and speed? ›
Pace is time per distance (e.g. 5:00 per kilometre); speed is distance per time (e.g. 12 km/h). They are reciprocals — a lower pace means a higher speed. This tool shows both so you can read whichever you prefer.
Are the equivalent race times accurate? ›
They are a direct projection of your entered pace across the full race distance, assuming you hold that exact pace the entire way. In real races fatigue slows you over longer distances, so treat them as a best-case estimate, not a guarantee.
Can I use this for cycling or walking? ›
Yes. The math is the same for any steady-paced activity. Cyclists often prefer speed (km/h) which is shown alongside the pace, and walkers can use the per-mile splits to plan long hikes.