How this calculator works
This calculator estimates body fat percentage using the U.S. Navy method based on sex, height, waist, neck, and hip measurements. Enter the required measurements to see the estimated body fat percentage. Use it for fitness tracking, health assessment, and comparing body composition. The key inputs are sex, height, waist, neck, and hip measurements. The output is the estimated body fat percentage. Real-world applications include fitness monitoring, health screening, body composition tracking, and progress measurement. The calculator uses logarithmic U.S. Navy method formulas based on sex, height, waist, neck, and hip measurements. It is a practical estimate, but measurement technique matters. Small tape-measure errors can change the result. The female formula includes hip circumference because body fat distribution differs on average by sex. It can give a more body-composition-focused estimate than BMI, but it is still an estimate and not a medical assessment.