# What is a normal BMI?

## What is a normal BMI?

18.5 to 24.9
For most adults, an ideal BMI is in the 18.5 to 24.9 range. For children and young people aged 2 to 18, the BMI calculation takes into account age and gender as well as height and weight. If your BMI is: below 18.5 – you’re in the underweight range.

What is BMI explain with an example?

the body mass index (BMI) or Quetelet index is a value derived from the mass (weight) and height of an individual. The BMI is defined as the body mass divided by the square of the body height, and is universally expressed in units of kg/m2, resulting from mass in kilograms and height in metres.

How do you calculate BMI with age?

The formula is BMI = kg/m2 where kg is a person’s weight in kilograms and m2 is their height in metres squared. A BMI of 25.0 or more is overweight, while the healthy range is 18.5 to 24.9. BMI applies to most adults 18-65 years.

### What is a normal waist size?

For your best health, your waist should be less than 40 inches around for men, and less than 35 inches for women. If it’s larger than that, you may want to talk with your doctor about what your next steps are, including losing weight. You can’t spot-reduce your waist, or any other part of your body.

What does a body mass index ( BMI ) mean?

This indicates that a person is within the normal weight range for his or her height. A BMI chart is used to categorize a person as underweight, normal, overweight, or obese. BMI is an indicator of total body fat in many individuals. Thus it is considered as an indicator of health risk.

How is body mass index calculated for children?

BMI is used differently for children. It is calculated in the same way as for adults, but then compared to typical values for other children of the same age. Instead of comparison against fixed thresholds for underweight and overweight, the BMI is compared against the percentile for children of the same sex and age.

## How is BMI related to height and weight?

BMI is proportional to the mass and inversely proportional to the square of the height. So, if all body dimensions double, and mass scales naturally with the cube of the height, then BMI doubles instead of remaining the same.

How can I find out what my BMI is?

If you want to calculate your BMI, try our healthy weight calculator. BMI takes into account natural variations in body shape, giving a healthy weight range for a particular height. As well as measuring your BMI, healthcare professionals may take other factors into account when assessing if you’re a healthy weight.