CRN #: ______________
Lab: Body Mass Index
In s t ru c t io n s
1. The Body Mass Index Chart or BMI can be a useful tool for assessing the ranges for
health body composition based on a person's height. The simplicity of the BMI formula
has made it extremely popular as an initial diagnosing tool.
2. Using the attached chart, ﬁrst locate your height on the horizontal axis along the top.
Then ﬁnd your weight on the vertical axis on the left. Find where these two values
intersect on the chart. The number at this intersection is your Body Mass Index, or BMI.
3. Compare the color area for this value with the key at the top to see which range you
fall within: obese, overweight, normal, or underweight. Record your result at the bottom
of this page.
4. Keep in mind that this formula does have its shortcomings because it does not take into
account age, frame size, gender, or muscularity. It is probably best to compare this result
with an assessment of body composition that is determined via either a skinfold test or
bioelectrical impedance device.
Body Mass Index:
* If you weigh less than 80 lbs., or more than 260 lbs, use the below formula to calculate
your BMI. If you are not sure how to use this formula, contact your instructor for