Body Composition

BMI Calculator

Calculate your Body Mass Index and get fasting protocol recommendations tailored to your BMI category — including what to watch for and where to start safely.

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BMI
Where you sit on the BMI scale
1518.525303540
Underweight <18.5 Healthy 18.5–24.9 Overweight 25–29.9 Obese I 30–34.9 Obese II 35+
Healthy weight range
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to —
To reach lower bound
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kg to lose
At healthy BMI
18.5–24.9
WHO standard range
What this means for your fasting routine
BMI has limitations. It doesn't distinguish between muscle and fat, and it can misclassify muscular individuals or those with high bone density. It also doesn't account for where fat is distributed — which matters more for metabolic health than total BMI. Use this as a starting point, not a definitive health verdict. Always discuss fasting changes with your healthcare provider.