Runner's Splits
Reckonersweight 1reckoner · computes, doesn't store
You want to finish in under two hours; the question is what that means at kilometre one, when you feel immortal and are about to ruin everything. Runner's Splits does the pace arithmetic — target time into per-kilometre splits, or your pace into a projected finish — so the plan exists before the gun goes. It computes and stores nothing; the legs keep their own records.
This is not a screenshot. It's the real tool, running right here — go on, put something in it.
Open the demo full-screen: /demos/runners-splits.html
Questions people ask
How do I calculate my race pace for a target finish time?
Give it the distance and the time you are aiming for, and it computes the pace and the splits. Write them on your hand, tape them to your bottle — the plan is now portable.
Is this pace calculator free, offline, and account-free?
All three. It is one HTML file that runs in your browser with no connection, computes on the spot, and stores nothing — your ambitions never leave the page. It also cannot sell you shoes.
Can it tell me what finish time my usual pace gives?
Yes — the arithmetic runs both directions. Enter your pace and the distance and it projects the finish, which is a useful reality check before you promise anyone a personal best.
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