Easily plan your race by calculating splits based on your target time or pace. Adjust individual splits to see how it affects your race plan.
Enter your race distance plus either a target finish time or a goal pace — the calculator fills in the other value and breaks the race into splits automatically.
There's no single "good" pace — it depends on your experience, training, and goals. A more useful approach is to base your target pace on a recent race result (try the Race Time Predictor) or a pace you know you can sustain, then plan splits around it here.
When you edit or nudge a split, that split is locked in place and the remaining time is redistributed evenly across the splits you haven't touched, so your overall finish time stays the same.
Yes. Use the km/mi toggle at the top of the calculator. Switching units recalculates real splits in the new unit (e.g. actual 1-mile splits), rather than just relabeling the numbers.
Yes — once you've calculated splits, use the Share button to copy a link that encodes your full plan, including any manual split adjustments, so you can send it to someone else or reopen it later.