BMI Calculator Body Mass Index with metric & imperial units, plus sex & somatotype context. Metric (kg, cm) Imperial (lb, ft+in) Sex (for context) Prefer not to say Female Male Intersex / Other BMI formula & cutoffs are the same; this only adjusts guidance text. Somatotype (optional) Not sure / Prefer not to say Ectomorph (leaner frame) Mesomorph (more muscular) Endomorph (easier fat gain) A broad frame-type heuristic; not medical. Weight (kg) Please enter a valid weight in kilograms. Height (cm) Please enter a valid height in centimeters. Tip: 1.75 m = 175 cm Weight (lb) Please enter a valid weight in pounds. Height (ft) Please enter feet (whole number). Height (in) Please enter inches (0–11.9). Tip: 5 ft 9 in = 69 in total Calculate BMI Reset — — BMI is a screening tool and does not directly assess body fat, muscle mass, or health. For personalized advice, consult a qualified professional.