BMI Calculator

BMI (Body Mass Index) is a measure that relates weight to height to classify the nutritional status of adults. It's calculated by dividing weight (kg) by height squared (m²). While widely used, it's a screening tool — not a diagnosis.

• Doesn't differentiate between muscle mass and fat mass • A bodybuilder can have an "obese" BMI while being extremely lean • Doesn't consider fat distribution (visceral vs subcutaneous) • Doesn't account for age, sex, or ethnicity • Not suitable for children, pregnant women, or the elderly • For athletes, body fat percentage is more informative

• Body fat percentage (skinfolds, bioimpedance) • Waist circumference (<94cm men, <80cm women) • Waist-to-hip ratio • Progress photos + measurements • CatalysFit tracks all these metrics for every client automatically