Auto method · Deurenberg formula. Uses BMI, age, and sex. Best for general estimation. Switch to Navy for circumference-based measurement or Manual to enter a known value.

These are screening tools, not diagnoses. BMI was devised in the 1830s for population statistics and doesn't account for muscle mass, bone density, body composition, age, or ethnicity. Body fat estimates vary by method — the Deurenberg formula uses BMI, the Navy method uses circumference measurements, and direct measurement (DEXA, calipers, bioelectrical impedance) is more accurate again. The reference silhouettes are illustrative and idealised, not personalised. For a proper assessment, speak with a healthcare professional.