Body & Weight Calculators
BMI, body fat and ideal weight.
Measure body composition with BMI, body-fat percentage, lean body mass and ideal-weight formulas, plus related health metrics.
Anorexic BMI CalculatorCompare your BMI against the anorexic threshold (17.5) and see the weight needed to reach healthy levels.Army Body Fat CalculatorEstimate body fat percentage using the US Army circumference method (AR 600-9).BMI CalculatorCalculate Body Mass Index from weight and height, with the standard WHO category.Body Fat CalculatorEstimate body fat percentage from body circumferences using the US Navy method.Body Surface Area CalculatorCalculate body surface area (BSA) from weight and height using the Du Bois and Mosteller formulas.Body Type CalculatorEstimate body frame size and somatotype from the ratio of height to wrist circumference.GFR CalculatorEstimate glomerular filtration rate (eGFR) and CKD stage using the CKD-EPI 2021 race-free equation.Healthy Weight CalculatorFind the healthy weight range for your height based on the normal BMI band (18.5–25).Height CalculatorPredict a child's adult height from the parents' heights using the mid-parental method.Ideal Weight CalculatorEstimate ideal body weight from height and sex using the Devine, Robinson and Hamwi formulas.Lean Body Mass CalculatorEstimate lean body mass (everything except fat) from weight, height and sex using the Boer formula.Overweight CalculatorSee your BMI, the maximum healthy weight for your height and how much excess weight you carry.Shoe Size Conversion CalculatorConvert shoe sizes between US, UK, EU and foot length in centimetres.Waist-to-Hip Ratio CalculatorCalculate your waist-to-hip ratio and see the associated health-risk category.