Body Mass Index Calculator Body Mass Index Calculator Enter the following data Sex male female Weight lbs kg Height inches cm meters Results Body Surface Area m2 Lean Body Weight kg = lbs Ideal Body Weight kg = lbs Body Mass Index kg/m2 = Interpretation of the results BMI < 18.5 underweight BMI 18.5 to 24.9 healthy BMI 25 to 29.9 overweight BMI 30 or more obese AllNutritionals.com The browser does not support JavaScript. The calculations will not work.