BMI Calculator
BMI stands for Body Mass Index. It's a measurement that uses your height and weight to estimate if your weight is in a healthy range for your height. Get recommendations based on your results.
BMI does not measure body composition directly, and it may not accurately reflect the health or wellness of individuals of a specific race/ethnic group, those with high muscle mass, pregnant women, children, the elderly, or those with specific health conditions. BMI should not be used as a sole diagnostic tool.
What your BMI result means
BMI stands for Body Mass Index — and when it's calculated, that number falls into a specific category that indicates how "normal" or healthy your weight is for your height.
Underweight
BMI Less than 18.5
Healthy Weight
BMI 18.5 – 24.9
Overweight
BMI 25 – 29.9
Obesity
BMI 30 or greater
If your BMI indicates that you may be in an overweight range or have obesity, a provider can help determine if weight loss treatment is right for you.
Frequently asked questions
What is BMI?
BMI (Body Mass Index) is a measurement that uses your height and weight to estimate whether your weight is in a healthy range for your height. It is widely used as a quick screening tool for weight-related health risks.
How is BMI calculated?
BMI is calculated by dividing your weight in kilograms by your height in meters squared (kg/m²). In imperial units, the formula is: BMI = (weight in pounds ÷ height in inches²) × 703.
Is BMI accurate for everyone?
BMI is a general screening tool and has known limitations. It does not directly measure body fat or muscle mass, and may not accurately reflect health for athletes, pregnant women, children, the elderly, or people of certain ethnic backgrounds. Always consult a healthcare provider for a full assessment.
What should I do if my BMI is outside the healthy range?
If your BMI is below 18.5 or above 24.9, speak with your healthcare provider. They can evaluate your overall health, recommend lifestyle changes, or discuss treatment options appropriate for your situation.
Important: BMI does not measure body composition directly, and it may not accurately reflect the health or wellness of individuals of a specific race/ethnic group, those with high muscle mass, pregnant women, children, the elderly, or those with specific health conditions. BMI should not be used as a sole diagnostic tool. This calculator does not determine eligibility for any weight loss medications or treatments. Consultation with a healthcare provider is required to assess suitability for any medical treatment based on individual health and medical history.