Feature:BMI can be used for population assessment 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 fatness but is not diagnostic.Instructions for useBMI is calculated the same way for both adults and children. The calculation is based on the following formulas:Formula: weight (kg) / [height (m)]2Please follow the steps below to calculate the BMI:1.Measure your height in mTake your weight in kg2.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 19.53Please refer to below BMI Categories: 1.Underweight <202.20HEALTHY <253.25OVERWEIGHT<304.25OBESE<40VERYOBESEPackage included :package 1:1*BMI body tape measurepackage 2:1*BMI body measure tape+1*body fat measuring cliper DIY Supplies:ELECTRICAL Origin:CN(Origin) Measurement Range:1.5 M Material:ABS Certification:CE Model Number:JC15 Size of Tape:150cm*7mm Tape Color:white, greed ,orange ,red four colors Strength:ingenuous structure with good obdurability Design:mini scientific body BMI calculator Tape scale design:cm on both sides, female on one side ,male on back side package 1 included:1*BMI body measure tape package 2 included:1*BMI body measure tape +1*body fat measuring cliper