BMI Calculator
Calculate your Body Mass Index and check your weight category
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Your BMI Result
Enter your height and weight to calculate BMI
BMI Categories
Underweight
< 18.5
Normal
18.5 - 24.9
Overweight
25 - 29.9
Obese Class I
30 - 34.9
Obese Class II
35 - 39.9
Obese Class III
> 40
BMI is a general indicator and may not be accurate for athletes, elderly, or pregnant women. Consult a healthcare professional for personalized advice.
Frequently asked questions
What is a healthy BMI?
18.5-24.9 is considered normal weight. Under 18.5 is underweight, 25-29.9 is overweight, 30+ is obese. These ranges apply to adults; children use age-specific percentiles.
Is BMI accurate for everyone?
BMI doesn't account for muscle mass, bone density, or fat distribution. Athletes may show 'overweight' due to muscle. It's a screening tool, not a diagnostic one—consult healthcare providers for personal guidance.
How do I calculate BMI?
BMI = weight (kg) ÷ height (m)². In imperial: BMI = (weight in lbs × 703) ÷ (height in inches)². Our calculator handles the math for you in either system.