FREE · PRIVATE · INSTANT

Free Running Tools

These results are observation aids, not medical targets. Use them alongside perceived effort, health, and real-world running conditions.

FAQ

About these tools

Are my inputs saved?

Calculator inputs are not stored on the server. If GA4 is enabled, only non-personal tool-use events are designed to be sent.

Are results training prescriptions?

No. They are general calculations, not individualized medical or coaching advice.