Fat Burn Zone Calculator

Find your optimal heart rate zone for maximizing fat burning during cardio exercise.

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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

years
bpm

Measure first thing in the morning

kg

Fat Burn Zone

125 - 145

beats per minute

Optimal: 135 bpm

Max HR
190 bpm
HR Reserve
130 bpm
Fat Cal/Min
24.9
Fat % of Energy
100%

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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