VO2 Max Calculator

Estimate your aerobic fitness with the Rockport one-mile walk test — and see how you rate. Free, private and instant.

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🏃 Rockport test

A proven field test: walk one mile fast, record your heart rate and time.

📈 Track progress

Re-test monthly and watch your VO2 max climb as your fitness improves.

🔒 Private

All calculations run locally in your browser. Nothing is sent anywhere.

⚡ Instant

Results update as you type. No buttons, no reloads.

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