Heart rate zone calculator
- Max HR (220 − age)
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| Zone | % Max HR | BPM | Purpose |
|---|
About this tool
Heart rate zone calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Health & Fitness. Browse more Health & Fitness tools.