BMI (Body Mass Index) is a simple calculation using a person’s height and weight. The formula is: BMI = weight (kg) / [height (m)]². For pounds and inches: BMI = (weight (lb) / [height (in)]²) × 703.

A healthy BMI for adults is typically between 18.5 and 24.9. Below 18.5 is considered underweight, 25–29.9 is overweight, and 30 or above is obese.

BMI is a quick screening tool to estimate if your weight might be putting you at risk for health problems like heart disease, diabetes, or high blood pressure.

BMI is a useful general guideline, but it does not account for muscle mass, bone density, age, sex, or ethnicity. Athletes and older adults may have misleading BMI results.

The BMI formula is the same for men and women, but healthy ranges may differ slightly. For children and teens, BMI is interpreted using age- and sex-specific percentiles.

BMI is not a reliable indicator for pregnant women or athletes with high muscle mass, as it does not distinguish between muscle and fat.

A high BMI can increase the risk of heart disease, type 2 diabetes, high blood pressure, certain cancers, sleep apnea, and joint problems.

A low BMI may be associated with malnutrition, osteoporosis, anemia, and weakened immune function.

To lower your BMI, focus on a balanced diet, regular physical activity, and healthy lifestyle habits. Consult a healthcare professional for personalized advice.

It’s a good idea to check your BMI a few times a year, especially if you are making changes to your diet or exercise routine.