The situation is more complex in children, where the BMI threshold of obesity varies with age and sex. The charts below show how the BMI obesity threshold changes with age for boys and girls.

Based on the chart below, you can calculate your BMI to see if it indicates you are underweight, a healthy weight, overweight ...

Their BMI might say they are overweight or obese when really their weight is made up of muscle instead of fat. Based on the ...