# VO2 Max Calculator

> VO2 max calculator: estimate your aerobic fitness from a resting heart rate, run time, or walk test and see your fitness age and rating. Free, private.

- **Canonical URL:** https://boringtoolskit.com/vo2-max-calculator/
- **Category:** Health
- **Evidence level:** catalogue
- **Reviewed:** July 26, 2026
- **Last verified:** 2026-10-12
- **Privacy:** Inputs and results stay in this browser unless the page clearly labels an external request.

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