Body Mass Index.

Would you like to know how to calculate your body fat percentage? When most of us think about about losing weight, the amount of fat you are carrying around is actually much more important than weight.

If you should be measuring anything, it should be body fat percentage, not weight. Your weight does not accurately reflect the level of your fitness.

Body fat is measured with what is known as Body Mass Index, or BMI.

A women that is in shape should have a body fat percentage range from 21% to 31%.

If you are in fantastic shape, your body fat percentage could be as low as 10%.

For men, if you are fit and in shape, your body fat percentage should be between 14% and 25%. If you are in excellent shape, your body fat percentage could be as low as 2%.

To calculate your body fat percentage, write down how much you weigh but you have to be honest. Remember, no one will see this but you. Multiply your weight by 703.

Next, write down your height, in inches. Multiply by that same number. Then you will divide your weight number by your height number. That is your BMI.

For example, if your weight were 150 pounds x 703, your...

The body mass index, or BMI, helps clarify an important distinction between being overweight or being obese. If you weigh too much, you’re obviously overweight. But if you have a very high proportion of body fat, you’re obese. Based on your body mass index, your doctor or other health professional will classify your weight as healthy, overweight, or obese.

According to the National Heart, Lung and Blood Institute (NHLBI), the BMI “describes body weight relative to height and is correlated with total body fat content in most adults”. In almost all cases, this means that the BMI will accurately reflect your weight and proportion of body fat as a function of your height and weight when categorizing you as healthy, overweight or obese.

Calculating your approximate body mass index is relatively straightforward, although you’ll probably need a calculator just to save time. To get your BMI, multiply your weight in pounds by 703. Next, divide that result by your height in inches. Then divide that result by your height in inches one more time.

As an example, let’s say you weigh 180 pounds and are 5 feet 10 inches tall.

Multiply 180 by 703 to get 126,540. Next, divide this by 70 (70 inches is the same as 5′ 10″) to get 1807.7. Now, divide 1807.7 by 70 one more time. The result — 25.8– is your approximate BMI or body mass index. If you don’t have a calculator handy, you can get the same result using the free interactive BMI calculator at www.nhlbisupport.com/bmi/bmicalc.htm.

If the above example sounds you, you might be surprised to learn that you’re ever so slightly heavier than your doctor might like. A BMI from 18.5 up to 25 is considered healthy, from 25 up to 30 is classified as overweight, and 30 or higher is obese.

Generally, says the NHLBI, the higher a person’s BMI, the greater the risk for health problems. In addition to causing your BMI to skyrocket, excess body fat is a well recognized health risk. Men and women with waist lines in excess of 40 and 35 inches, respectively, are much more at risk for health problems like Type 2 diabetes, high blood pressure and high cholesterol.

Like every rule of thumb, this one also has it exception. Body builders, for example, often have a body mass index above 25 and sometimes even above 30. In this case, however, the higher BMI reflects the fact that body builders have more muscle mass without having more fat.

Finally, there’s still only one sure way to lower your BMI if you’re overweight or obese: Eat less and exercise more. Your body will burn more calories than you eat and your body mass index will go down over time.