Question

Evaluating & Measuring Fitness

# What is a healthy weight for my height?

• BMI is a great tool for measuring healthy weight to height in most people but I wanted to add another thing.

The better in shape you get and the closer you get to your weight goal I would advice finding a reputable fitness professional that can accurately test your body fat percentage.  For many fitness enthusiasts that get in great shape they will have a phenomenal fat to muscle ratio and because they are in shape their weight may not be extremely low because they carry a higher percentage of muscle.

Lets say we have two females, each are 68 in tall.  One weighs 120 lbs and has a body fat of 30% and the other is 125 lbs and has a body fat of 20%.  Doing the math we will find that the first has about 36 lbs of fat and lean mass of 84 lbs.  The second person although heavier has only 25 lbs of fat and lean mass of 100 lbs.  The second person  believe it or not will be smaller and fit into smaller clothes because they are more dense and compact and toned and tight.

The example given above is great and BMI is a great tool for those who are overweight and looking to lose weight and be healthier.  However once you get in good shape I would encourage you to start to go more toward body fat testing once you are in a healthy range in your BMI.
• The body mass index (BMI) calculation is the easiest way to get an idea of a healthy weight for your height.  The calculation is:
[weight in pounds ÷ inches squared] × 703 = BMI
A healthy BMI score is between 19 and 24.9.
We can reverse the calculation in order to calculate a healthy weight range:
o First square your height in inches.  Then multiply be 0.027 (this number comes from a BMI of 19 divided by 703).  This is the lower end of your healthy weight range.
o Then take your height in inches squared and multiply by 0.0354 (calculated using a BMI of 24.9 divided by 703).  This will give you the high end of your healthy weight range.
Example for a 5’6” person (66 inches):
66 x 66 = 4356.
4356 x 0.027 = 117.7
4356 x 0.0354 = 154.2
o The healthy weight range for this person is 117.7 – 154.2 pounds.