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Over 40 Body Fat & Lean Mass Calculator | 40fitpro

Precision Body Composition: Over-40 Body Fat & Lean Mass Estimator

When it comes to tracking your health and physical transformation over 40, the number on your standard bathroom scale lies. Weight alone doesn't distinguish between metabolic-destroying visceral fat and youth-preserving lean muscle mass.

Welcome to the 40fitpro Over-40 Body Fat & Lean Mass Estimator, built on the scientifically validated US Navy Body Composition algorithm.

As we age, maintaining lean muscle mass (sarcopenia defense) and minimizing abdominal fat are the two highest-leverage factors for metabolic longevity, testosterone support, and joint resilience. This tool measures your exact body composition without needing expensive DEXA scans.

How to measure accurately:

Neck: Measure horizontally right below the larynx (Adam's apple).

Waist: Measure horizontally around the navel (belly button) for men, or narrowest point for women.

Hips (Females only): Measure at the widest point around the buttocks.

Click "Calculate Body Composition" to instantly reveal your Body Fat %, Lean Mass, Fat Mass, and customized biohacking guidelines.

40fitpro Longevity Metrics

Body Fat & Lean Mass Estimator

Military-grade US Navy Method optimized for over-40 body composition.

Gender

Age (Years)

Current Weight (kg)

Height (cm)

Neck Circumference (cm)

Waist Circumference (cm)

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