Target Heart Rate
Find exercise heart rate zones using Karvonen method.
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Formula
THR = ((Max HR - Resting HR) × Intensity%) + Resting HR
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Max Heart Rate
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Fat Burn (50-70%)
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Cardio (70-85%)
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Peak (85-95%)
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How This Target Heart Rate Works
This calculator uses established scientific formulas validated in peer-reviewed literature. All calculations run locally in your browser — no data is sent to any server.
Frequently Asked Questions
How accurate is this?
Uses well-established formulas accurate for most people. Individual variation is normal.
Is my data stored?
No. All calculations run in your browser. No data collected.
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