Terms of Use

Last updated: 2026

Use of the site

RunMath's calculators are free to use, whether you're planning your own races or coaching other people. You're welcome to link to any page.

No warranties

The calculators and the explanatory content are provided "as is". We work to keep the math correct, and each page shows its formulas so you can verify them, but we can't guarantee the site is free of errors, and results are informational only. Race predictions are estimates built on published formulas and average runners; your fitness on the day, the course, the weather and your training all move the real result in ways no calculator can see. They are not medical or coaching advice.

Limitation of liability

To the maximum extent permitted by law, RunMath is not liable for any loss or damage arising from use of this site, including a race that goes out too fast on the strength of a prediction.

Third-party links and ads

Pages may contain links to third-party sites and third-party advertising. We're not responsible for the content or practices of external sites. See our Privacy Policy for how advertising works here.

Changes

We may update these terms; the current version will always live at this page.