Feature: BMI can be used for population aement of overweight and obesity. Because calculation requires only height and weight, it is inexpensive and easy to use for clinicians and for the general public. BMI can be used as a screening tool for body fatne but is not diagnostic. Instructions for use BMI is calculated the same way for both adults and children. The calculation is based on the following formulas: Formula: weight (kg) / [height (m)]2 Please follow the steps below to calculate the BMI: 1.Measure your height in mTake your weight in kg 2.Turn the turnplate on the BMI tape measure according to your weight and height. 3.And then you will get the correct BMI. Example: Weight = 50 kg, Height = 1.6m, BMI is 19.53 Please refer to below BMI Categories: 1.Underweight <20 2.20HEALTHY <25 3.25OVERWEIGHT<30 4.25OBESE<40VERYOBESE Package included : package 1:1*BMI body tape measure package 2:1*BMI body measure tape+1*body fat measuring cliper Retractable and Portable Measuring tape with push button in center to retract tape.Light weight, portable to carry and use at any time Measuring Range cm on both sides, female on one side ,male on back sideso it is a Scientific BMI Measuring tape With Body Fat Calculator,it can easily measure both male and female BMI Great Material Soft advanced fibergla tape, flexible and durable.It can avoid Injury or Cuts, won't stretch or deform. Wide Application Perfect tape measure for BMI BMI Sets included :1*BMI body measure tape +1*body fat measuring cliper