❤️ Health & Fitness
Heart Rate Zones Calculator
Karvonen-style training zones from age and resting heart rate.
Results
- Est. max HR
- 185 bpm
- Zone 1 (Recovery)
- 123–135 bpm
- Zone 2 (Fat burn)
- 135–148 bpm
- Zone 3 (Aerobic)
- 148–160 bpm
- Zone 4 (Threshold)
- 160–173 bpm
- Zone 5 (Max)
- 173–185 bpm
Formula / how it works
Zones use heart-rate reserve (Karvonen). Educational only.
Disclaimer: Results are estimates for educational purposes and are not a substitute for professional financial, medical, legal, or tax advice. Read more
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