Obesity

Calculate Body Mass Index to Know Your Weight Status

Your body mass index (BMI) reflects the condition of your health. It provides you a statistical figure to gauge whether you are underweight, overweight, or grossly obese.

To be precise, it is the ratio of your weight in kilograms divided by the square of your height in meters.

To put this simply,

BMI = (weight in pounds * 703) / height in inches²

Or,

BMI = weight in kilograms / height in meters²

You can easily take your own weight and height measurements and then calculate your BMI using the formula provided.

Its unit is kilograms per square meter (kg/sq.m). Put down the values of your weight and height in the equation and calculate your BMI.
 
Table: BMI Categories

Your BMI (kg/m²) Your Weight Status
Lower than 18.5 Underweight
18.5-24.9 Normal
25-29.9 Overweight
Higher than 30
Obese
 
If your BMI is more than 25 kg/sq.m, you are overweight. If it is more than 30 kg/sq.m you are obese and if it is more than 40 kg/sq.m. then you are extremely obese.

Being overweight or obese is bad for your health. You need to lower your BMI in this case. Since, there is no way you can increase your height after you grow out of your teens, the only component that you can control is your weight.

By lowering your weight you can lower your BMI to the optimum range of 18.5 to 24.9 kg/sq.m. To lower your weight you need to implement a regular exercise and balanced diet plan.

Calculate BMI Step by Step
To take your body weight, remove your shoes and any heavy clothes that you are wearing. Then stand on the foot rest of a weighing machine. You can get highly accurate readings of your body weight if you use a digital weighing machine. Its accuracy is 0.01 kg. Otherwise, you can do with any normal weighing machine of the analog type. It will provide you with a weight reading that is accurate to 1 kg.

However, ensure that the weighing machine pointer arrow indicates exactly zero kg when no weight is kept on the footrest. You can turn the screw that adjusts the arrow to zero if it is not already pointing to zero.

After the arrow points to zero kg, you need to stand straight with both your feet on the foot rest of the machine. The machine arrow will then point to your weight reading in kg on the weighing machine scale. Note down your weight reading on a sheet of paper.

Thereafter, proceed to take your height reading. To do so, stand against a wall with you facing away from it. Then use a ruler and keeping it completely horizontal touch the top of your head with it. Simultaneously touch the wall behind you with an end of the horizontal ruler. Mark off the level on the wall where the edge of the ruler touches it.

Next measure the vertical height of the marked off level on the wall from the floor level using a measuring tape calibrated in meters and centimeters. Ensure that the ruler is exactly horizontal when you mark off the level on the wall. Else, the height reading will be inaccurate. Note down the height on the sheet of paper on which you had noted down your weight reading in kilograms.

Your body mass index can now be calculated based on your weight and height readings. Use the formula given above.
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