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ShapeUpAmerica.com provides clinical-grade calculation tools for educational and informational purposes only. The results are not a substitute for professional medical advice, diagnosis, or treatment. Always consult with a licensed healthcare professional before making health-related decisions.

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CategoriesBody & Composition

Body & Composition

Understanding your body's beautiful and unique story.

Your body is more than just a number on a scale. This category focuses on your 'Body Story'—the balance of muscle, bone, and vitality. By looking at metrics like Relative Fat Mass and Lean Body Mass, we help you move beyond simple weight tracking and into a deeper understanding of your physical resilience and strength. We explore the balance of your body's tissues, focusing on strength, lean mass, and healthy proportions.
17 Tools Available
Updated

Biological Body Age

Calculate your body's physiological age compared to your calendar age.

Body & Composition

BMI Calculator

Standard body mass index calculation with clinical classification.

Body & Composition
Updated

Longevity Predictor

Estimate your life expectancy based on biological markers and lifestyle factors.

Body & Composition

BMI Prime

A ratio of actual BMI to upper limit BMI.

Body & Composition

Body Fat Calculator

Estimate body fat percentage via US Navy method.

Body & Composition

Body Surface Area

Calculate total skin surface area.

Body & Composition

Child BMI (%)

BMI percentile for children and teens (2-19).

Body & Composition

FFMI Calculator

Fat-Free Mass Index for muscularity analysis.

Body & Composition

Height Percentile Tool

Compare height with the general population.

Body & Composition

Ideal Body Fat Range

Healthy body fat targets by age and gender.

Body & Composition

Ideal Weight Calculator

Calculate recommended healthy weight.

Body & Composition
Updated

Lean Body Mass (LBM)

Calculate the mass of your body excluding fat.

Body & Composition

Pregnancy Weight Guide

Recommended weight gain based on pre-pregnancy BMI.

Body & Composition

Relative Fat Mass (RFM)

A simpler, clinical alternative to BMI.

Body & Composition

Waist Reduction Estimator

Predict waist changes based on fat loss.

Body & Composition
Updated

Waist-to-Height Ratio

A simple indicator of abdominal obesity.

Body & Composition
Updated

Waist-to-Hip Ratio

Evaluate body fat distribution.

Body & Composition

Common Questions

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Movement & Strength

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Nourishment & Energy

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Heart & Vitality

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