Free Sports & Fitness Calculators

Built around the live tools, not on top of them

This site already had a running-pace set that people use every day, so nothing here repeats it. The pace tool converts pace, time and distance; the training tool takes a finished race result and hands back the five workout paces derived from it. Each page names the neighbouring tool, links it, and says in a sentence which question belongs where — because two pages competing for one query helps nobody.

Where a scoring system is proprietary, the page says so

Some sports maths is published and some is not. The Duckworth-Lewis-Stern tables used in professional cricket are not open, so the page here implements the standard published resource-percentage approach, prints its own parameters, states plainly that they are not the official ones, and offers an override for anyone holding the real figures. The same honesty applies to fitness-test scoring: where an official grid could not be verified, the tool asks you for your own bracket’s anchors rather than inventing a table.

Health-adjacent, and careful about it

Several of these touch energy expenditure and training load. They describe how the published equations work, cite them, and set no targets for the reader. A heart-rate-based calorie estimate refuses to print a number below the range where its equation is valid, rather than showing something confident and wrong. Anything touching health carries a plain disclaimer and points at the professional who should actually advise you.