Understanding BMI
BMI compares weight with height. For adults, it is commonly used as a screening measure rather than a diagnosis. A single BMI value does not describe body composition, medical history, fitness or laboratory findings.
Measuring waist correctly
Waist measurement can add context to weight-related screening. Use a consistent landmark and technique, avoid pulling the tape excessively tight, and repeat the measurement when technique may have changed.
Body-fat estimates
Tape-based and consumer-device estimates can be useful for tracking trends, but different methods can disagree. Look for repeatability under similar conditions rather than treating one reading as exact.
Healthy weight planning
Use trends, habits, activity, sleep, nutrition and clinical context together. If a measurement is concerning or changing unexpectedly, discuss it with a qualified health professional.