Assess muscular development relative to your height. Use recent body measurements for a clearer body-composition estimate.
Complete the form and select “Calculate result.” Your measurements never leave this page.
A transparent overview of the inputs, method, and appropriate interpretation.
It estimates lean body mass from circumference data, then divides fat-free mass by height squared to create a height-adjusted muscularity estimate.
Circumference-based body composition methodClear answers to help you understand and use your estimate.
Yes. It is free, runs in your browser, requires no account, and does not store the measurements you enter.
No. This result is an educational estimate, not a diagnosis or treatment recommendation. A qualified professional can interpret it within your complete health and training context.
Tape placement, breathing, hydration, recent meals, body-fat distribution, and the population used to develop the equation can change the estimate.
Recalculate when you take a new set of circumference measurements. Use the same tape positions and measurement conditions for a useful comparison.
Read our calculation methodology →Still have questions? Explore the guides ↗