The calculation method of college students' body mass index bmi is

Body mass index = weight (kg) ÷ height (m? )

For example, Xiao Li's height is 165cm and weight is 55kg, so Xiao Li's body mass index is 55/(1.65 *1.65) = 20.2, which is a healthy weight. The comparison table is as shown in the figure:

Body mass index is body mass index, also known as body mass index or body mass index. Measuring the body's fatness and thinness is a common international standard. It can reflect the density of human body to a certain extent, and can also be used as a reference for reducing fat, which is suitable for the general population.

The body mass index of adults in China is generally 18.5 ~ 23.9, which is normal. However, for people with a particularly high proportion of muscles, pregnant women and other special groups, the reference significance of this calculation result is not great. Even if their body mass index exceeds 30, they actually don't need to lose weight.

Because of different operations, the data obtained will be different, or external factors will also lead to differences in values. It is recommended to measure many times and take the average value as the reference value.

In addition, when calculating the formula, we must pay attention to the formula unit, the weight is kilograms (kg), the height is meters (m), which is the square of the height.