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Enter your height and weight below to calculate your BMI instantly.
Calculate your Body Mass Index (BMI) in metric or imperial units.
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Enter your height and weight below to calculate your BMI instantly.
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Body Mass Index (BMI) is a simple and widely used measurement to assess whether a person has a healthy body weight for their height. It provides a general indication of whether someone is underweight, normal weight, overweight, or obese. BMI is a useful screening tool for health professionals to identify potential weight-related health risks, though it does not directly measure body fat or account for factors like muscle mass, age, or gender.
BMI is calculated by dividing a person's weight (in kilograms) by the square of their height (in meters). For those using imperial units, weight in pounds is divided by the square of height in inches, then multiplied by 703 to convert to the standard BMI scale. The formula is: BMI = weight (kg) / [height (m)]² for metric, or BMI = [weight (lbs) / [height (in)]²] × 703 for imperial. The resulting number places individuals into categories: below 18.5 (underweight), 18.5–24.9 (normal), 25–29.9 (overweight), and 30 or higher (obesity).
While BMI is a helpful starting point, it’s not a definitive measure of health. For a comprehensive assessment, consult a healthcare provider to consider other factors like diet, physical activity, and medical history. Use our calculator above to find your BMI and see where you stand!
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| Category | BMI Range |
|---|---|
| Underweight | Below 18.5 |
| Normal Weight | 18.5–24.9 |
| Overweight | 25–29.9 |
| Obesity | 30 and above |
What is a healthy BMI? A BMI between 18.5 and 24.9 is considered healthy for most adults, indicating a balanced weight for height.
Can BMI be used for everyone? BMI is less accurate for children, athletes, or older adults. Consult a doctor for personalized advice.
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