Fat Burn Zone Calculator
Find your optimal heart rate zone for maximizing fat burning during cardio exercise.
Important Health Disclaimer
This calculator provides general health information based on standard medical formulas and WHO guidelines. Results are for informational and educational purposes only and should not be considered as professional medical advice, diagnosis, or treatment recommendations.
For health concerns, medical conditions, fitness plans, or dietary decisions, please consult with qualified healthcare professionals, licensed physicians, registered dietitians, or certified fitness trainers who can evaluate your individual health status and medical history.
Individual health needs vary significantly. These calculations are general estimates and may not be appropriate for everyone, especially those with existing medical conditions, pregnant women, children, or elderly individuals.
Not a substitute for professional medical advice
Your Information
Measure first thing in the morning
Fat Burn Zone
125 - 145
beats per minute
Optimal: 135 bpm
Fat Burning Facts
Fat burn zone: 50-65% of HR reserve
Maximum fat oxidation at ~60% HRR
30 min session burns ~746 fat calories
Higher intensities burn more total calories
Consistent low-intensity is effective for beginners
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