Free BMI Calculator Online — Calculate Body Mass Index
< 18.5
18.5 - 24.9
25 - 29.9
≥ 30
BMI FAQ
What is BMI?
BMI (Body Mass Index) is a measure of body fat based on height and weight. It's calculated as weight(kg) / height(m)².
Is BMI accurate?
BMI is a general indicator. It doesn't account for muscle mass, bone density, or body composition. Consult a healthcare provider for personalized advice.
How to Use Our BMI Calculator
Enter your height and weight to instantly calculate your Body Mass Index (BMI). The tool shows your BMI value along with the health category it falls into: underweight, normal, overweight, or obese.
BMI is a widely used screening tool that provides a quick estimate of body fat based on height and weight. It's useful for general health awareness, though it doesn't account for muscle mass or body composition.
Why Use Our BMI Calculator?
It's free, instant, and supports both metric (kg/cm) and imperial (lbs/inches) units. Get your result with a clear visual indicator of where you fall on the BMI scale.
What are the BMI categories?
Underweight: below 18.5. Normal weight: 18.5–24.9. Overweight: 25–29.9. Obese: 30 and above. These ranges are defined by the World Health Organization and apply to adults over 20.
Is BMI accurate for everyone?
BMI is a useful general indicator but has limitations. It may overestimate body fat in athletes with high muscle mass and underestimate it in older adults. Consult a healthcare provider for a complete health assessment.
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