The BMI Fat Formula

The BMI formula factors height and weight to find if you have excess body fat. BMI measurement is a better assessment of fatness, as opposed to body weight alone, since it takes into account height. For example, knowing an individual weighs 200 pounds isn’t adequate info to appraise whether they are overweight. Factoring in a person’s height helps put their body weight into perspective: A person who is 6-foot and 200 pounds may not be over-weight, while another person who is 5-foot-8 and 200 pounds is more in all probability to bear extra body fat.

BMI and Body Fat

Higher BMI numbers are linked with increased chances of disease and dying. Higher BMI numbers are linked with diseases such as cancer, cardiovascular disease, and type 2 diabetes. Research has detected that the lowest and highest BMIs are linked with the worst health risks. So BMI numbers are sorted into categories intended to reflect the grade of danger a person faces.

Those individuals with the lowest risks of disease seem to fall in the 18.5 to 24.9 BMI order, so they are counted to be “normal.”

A BMI of 25 looks to be the marker where disease danger significantly step-up, and a BMI of 30 confers even broader health perils. So these ranks are classed into “overweight” and “obese” categories.

BMIs 40 and above are associated to even broader perils of certain diseases. The “underweight” class is included because being excessively thin is also linked with increased health chances.

BMI Categories - Overweight and Obese

Underweight <18.5
Normal 18.5 - 24.9
Overweight 25.0 - 29.9
Obesity 30.0 - 39.9
Extreme Obesity 40+

Being diagnosed with a BMI of 30 or above means that you are fat. A BMI of 25+ means that you are heavy, and while a heavier person ordinarily has too much fat, this is not necessarily true.

People who are heavy may be that way because they are highly muscular. Muscular individuals may have a very low percentage of body fat, even though weighing more on a scale. So their BMI total might not be a true mode to ascertain if they bear more body fat than they do. Muscular individuals, often have higher BMIs. But since they are healthy and lean, they are not necessarily at increased chance of certain health risks only because they have got a big BMI.

In certain illustrations BMI is not a legitimate indication of body fat.

More Senior individuals may carry more body fat and less muscularity, but their BMI count may live on the low end of the BMI scale, suggesting that they have got less body fat than they do.

People under 5 ft may also have high BMI numbers that do not reflect their level of fatness. People who are sick or on medicines that induce exceptional amounts of edema, or swelling in the body, may weigh to a greater extent from extra fluid collection. In this event, a higher BMI count may not indicate the absence or presence of body fat.

As a statistical tool applying thousands of instances, BMI is usable when working with research data to calculate the numbers of the overweight and obese and connected disease chances. For the individual, BMI is a useful means to monitor weight changes over time.

Because BMI does not directly measure body fat, or where in the body fat is distributed, it may not be the best method of gaging personal tiers of fatness and how it pertains to health risks. Waistline, and other factors should be looked at when valuing a person’s overall health chances.

How to Find Your BMI

A laboratory is the proper setting to measure your BMI. Some laboratory body testing equipment such as underwater scales, dual-energy X-ray absorptiometry and the Bod Pod measure body fat directly. There are other methods (although less reliable) to meter body fat. Including skin fold testing or using a commercial body fat scale, some gyms provide these body fat testing services.

The BMI test is a improved manner to find out if you have excess body fat. BMI associates height to weight and is a better assessment of fatness, as opposed to using body weight exclusively.


Scientists have discovered that the lowest and highest BMIs are linked with the most deadly health perils such as cancer, cardiovascular disease, and type 2 diabetes.

BMI figures are grouped into categories designated to typify the degree of jeopardy an individual faces. A BMI of 25 looks to be the verge where health endangerment significantly steps-up, and a BMI of 30 confers even heavier health stakes. Extremely high BMIs (40+) are connected to even more life-threatening dangers of certain health risks. The BMI “underweight” grade is part of the chart because being excessively trim is also connected with raised wellness dangers. Taking the time to get your BMI measured may be an unreasonable or expensive suggestion for some individuals, but there are alternatives such as skin fold measuring, that are not as exact, but less costly or free and are accessible at local health clubs.