Body Composition & Health
Body-composition estimates and hydration planning.
Public tools here focus on tape-measure body-composition estimates and daily hydration planning. Treat the results as approximate context, not medical assessment.
Start here
- Structural Density — Tape-measure body-fat estimate using the US Navy method.
- Hydraulic Integrity — Coolant load vs current intake.
Featured tools
Guides & explainers
Related clusters
Frequently asked questions
› Why US Navy body-fat, not BMI? Troubleshooting
BMI cannot tell muscle from fat. Circumference methods validate ±3-4% against DEXA — better for athletic or lean populations.
› Can hydration math diagnose dehydration? Trust & accuracy
No. It gives a daily planning target from body mass, activity, and climate assumptions. Symptoms or medical risk need qualified care.