Turn a finish goal into every mile.

Pick a distance and a target and your full pacing plan appears here. Every pace is editable — the totals follow.

The question you actually have at halfway. Enter where you are and what the clock says, and this gives you the pace the rest of the race needs.

Riegel's formula is the headline figure. Cameron's is shown alongside because Riegel runs optimistic over the marathon — where they disagree, the honest answer sits between them.