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.