About this site

What you get

Every race page opens with the numbers you came for: the pace behind each goal time, and the clock you should see at the markers along the course. Below the tables, a calculator solves for time, pace or distance from any two values, with kilometre and mile splits.

How the numbers are made

All arithmetic uses the official race distances (5.000 km, 10.000 km, 21.0975 km, 42.195 km) and one exact constant: a mile is 1.609344 km. Table paces are rounded down to the full second so a listed pace always achieves its goal time. Every calculation runs in your own browser; nothing you type is uploaded or stored anywhere.

Who runs it

This site is run by CalculateDaily. It has no user accounts and nothing to log in to.