VO₂max Calculator
Aerobic capacity from Cooper 12-min run or resting HR.
See how it works
Watch a quick simulation of this tool in action — no file needed.
How to use VO₂max Calculator
Follow these steps — everything happens instantly in your browser.
- 1
Step 1. Pick a method: Cooper 12-min run or resting HR formula.
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Step 2. Pick your biological sex and enter your age.
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Step 3. Enter distance (Cooper) or resting HR (Uth et al.).
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Step 4. Read your estimated VO₂max and fitness rating.
Why use this tool
Private by design
All processing happens locally in your browser. Open DevTools → Network and you'll see zero file uploads. Ever.
Instant
No upload wait, no queue, no server round-trip. Results appear the moment you drop a file.
Free & unlimited
No accounts, no watermarks, no daily caps. Use it as many times as you like, forever.
Works everywhere
Desktop, tablet or phone — every tool is responsive and installable as a PWA for offline use.
Frequently asked questions
Everything you might want to know about vo₂max calculator.
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