Physics & Body Composition Calculators
Free physique and physics-oriented tools such as FFMI for lean-mass context. Educational only; not a medical diagnosis or training prescription.
1 free tools in this collection.
Calculators in this category
Search by name or scroll the list. Each card includes a short description so you can pick the right tool before opening it.
What these physique calculators cover
This hub currently focuses on body-composition style estimates such as FFMI (fat-free mass index), useful for comparing lean mass relative to height.
It is intentionally narrow today: clear physics/physique math without turning into a full fitness coaching platform.
Pair FFMI with measured body-fat methods carefully—input quality drives output quality.
Who this category is for
Athletes, coaches, and curious learners:
- Lifters comparing lean mass across height differences
- Coaches illustrating FFMI math in education settings
- Users who already have a body-fat estimate and want the index
How to use this hub
Enter accurate height, weight, and body-fat inputs on the FFMI page, then interpret bands cautiously:
- Measure height and weight consistently (same time of day when possible).
- Use a realistic body-fat estimate—guesses widen the error band.
- Treat FFMI as context, not a medical diagnosis or steroid detection test.
Physique calculators FAQ
- Is FFMI a medical test?
- No. It is an educational index derived from lean mass and height.
- Why is body fat required?
- FFMI needs fat-free mass. Without a body-fat estimate, lean mass cannot be separated from total weight.
- Where are calorie food tools?
- Restaurant calorie calculators live under Alimentation (food).
- Will more physics tools be added?
- Yes—this hub grows as we publish additional physique and physics helpers.
Not medical advice. Body-composition estimates depend on measurement quality.
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