Heart Rate Calculator
Calculate your target heart rate zones based on age and optional resting heart rate. Uses both standard and Karvonen formulas.
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Heart Rate Zones
Your maximum heart rate is estimated as 220 minus your age. Training zones are percentages of this maximum. The Karvonen method also factors in resting heart rate for more precise zones.
The Five Heart Rate Zones
- Zone 1 (50-60%): Recovery and warm-up
- Zone 2 (60-70%): Fat burning and endurance
- Zone 3 (70-80%): Cardio fitness
- Zone 4 (80-90%): Speed and power
- Zone 5 (90-100%): Maximum effort
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Disclaimer: This tool is provided as-is for informational and educational purposes only.