Calculate your Body Mass Index (BMI) based on your height and weight. Get instant feedback on your weight category and understand what your BMI means for your health.
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Your BMI Category
Underweight
< 18.5
Normal
18.5 - 24.9
Overweight
25 - 29.9
Obese
≥ 30
⚠️ Important Disclaimer:
BMI is a screening tool and has limitations. It does not account for muscle mass, bone density, overall body composition, age, sex, or ethnicity. Athletes and muscular individuals may have high BMI despite low body fat. Always consult a healthcare professional for personalized health advice.
What is BMI?
Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in metres squared.
BMI is used as a screening tool to identify potential weight-related health problems in adults. However, it is not diagnostic and should be considered alongside other factors.
BMI Categories
Underweight (BMI < 18.5): May indicate malnutrition or other health conditions. Consider consulting a healthcare provider.
Normal weight (BMI 18.5-24.9): Considered a healthy weight range for most adults.
Overweight (BMI 25-29.9): May increase risk of certain health conditions. Lifestyle changes may be beneficial.
Obese (BMI ≥ 30): Associated with increased health risks. Professional guidance recommended for weight management.
Limitations of BMI
Does not distinguish between muscle and fat mass
May not be accurate for athletes, bodybuilders, or very muscular individuals
Does not account for fat distribution (visceral vs. subcutaneous fat)
May vary in accuracy across different ethnicities and age groups
Does not reflect overall health or fitness level
Should be used alongside other health measurements like waist circumference, body fat percentage, and overall health markers
How to Use This Calculator
Select your preferred unit system (Metric or Imperial)
Enter your weight in kilograms or pounds
Enter your height in centimeters or feet and inches
Click "Calculate BMI" to see your results
Review your BMI score and weight category
Read the category descriptions to understand what your BMI means