Question 1

What is BMI and what does it measure?

Accepted Answer

BMI (Body Mass Index) is a numerical value calculated from your height and weight. It is used as a screening tool to categorize individuals as underweight (<18.5), normal weight (18.5–24.9), overweight (25–29.9), or obese (≥30) according to WHO standards. BMI does not directly measure body fat or overall health.

Question 2

How is BMI calculated?

Accepted Answer

BMI is calculated as weight in kilograms divided by height in meters squared (kg/m²). In imperial units, the formula is (weight in pounds × 703) / (height in inches)². Our calculator handles both unit systems automatically.

Question 3

Is BMI accurate for everyone?

Accepted Answer

BMI is a useful general screening tool but has known limitations. It does not account for muscle mass, bone density, age, sex, or ethnicity. Athletes may have a high BMI due to muscle rather than fat. For a comprehensive health assessment, consult a healthcare professional.

Question 4

What BMI is considered healthy for adults?

Accepted Answer

According to the WHO, a BMI between 18.5 and 24.9 is considered a healthy weight range for most adults. BMI below 18.5 is classified as underweight, 25–29.9 as overweight, and 30 or above as obese.

Question 5

Does the BMI calculator store my data?

Accepted Answer

No. All calculations are performed locally in your browser. No personal information such as height, weight, or results is sent to or stored on any server.

BMI Calculator