About PaceCalc

PaceCalc is a set of free running calculators for runners who train toward a goal time. Every tool starts with the number you need, then explains what to do with it.

There are no accounts and nothing to install. Your inputs stay in the page address, so you can bookmark a result or send it to a training partner.

How the numbers are worked out

Each calculator uses a published formula or an exact unit definition. The methodology page lists every formula and the source it comes from.