Running Pace Calculator
한국어Enter any two of distance, time and pace. You get the third.
Every answer comes in both km and miles. Turn a goal time into a split chart or a wrist pace band you can print.
Example: a 4:00:00 marathon is 9:09 /mi, or 5:41 /km (5:41.3 to the tenth).
Solve for
Enter distance and time to get pace.
Fill in two boxes. The answer shows up right below.
Race day gear
As an Amazon Associate I earn from qualifying purchases.
What this calculator does not do
It does not predict race times. It only divides and multiplies what you enter.
It does not tell you what pace to run. Split strategy is a menu, not advice.
Nothing you enter leaves this page. No account, nothing stored.
Read how pace math worksSources: World Athletics, Technical Rules 2026 Edition, Rule 55 Road Races, World Athletics, Half Marathon discipline page, NIST Handbook 44 (2026), Appendix C, units of length (checked 2026-09-24)
More tools from the same maker
Small free tools, built by one person.