Real-Time BMI Calculator
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Explore Courses →Complete Guide to BMI (Body Mass Index)
Body Mass Index (BMI) is a measure of body fat based on your height and weight. It is widely used by doctors and health professionals to screen for weight categories that may lead to health problems.
BMI Formula (Metric)
BMI = weight (kg) ÷ [height (m)]²
Example: 70kg ÷ (1.75m × 1.75m) = 22.9 BMI
Limitations of BMI
BMI is a useful screening tool but doesn't measure body fat directly. It may overestimate fat in athletes (muscle mass) and underestimate fat in older persons (loss of muscle).
Understanding Your Results
Being underweight can indicate malnutrition, an underlying medical condition, or a fast metabolism. It's advisable to consult a doctor to rule out health issues.
This is considered the ideal range for most adults. It is associated with the lowest risk of developing cardiovascular diseases and type 2 diabetes.
A BMI in this range suggests excess weight. Small lifestyle changes like regular 30-minute walks and portion control can help return to the healthy range.
Obesity is linked to higher risks of hypertension, sleep apnea, and joint issues. Consistent diet management and physician guidance are highly recommended.
Frequently Asked Questions (FAQ)
Is the BMI the same for men and women? ▼
Yes, the basic BMI calculation is the same for adult men and women. However, because men often have more muscle mass and women more body fat, the interpretation can sometimes differ in a clinical setting.
How accurate is BMI for athletes? ▼
Athletes may have high BMI scores because muscle weighs more than fat. In such cases, BMI may incorrectly flag a healthy athlete as overweight. Body fat percentage is a better metric for them.
What is a healthy BMI for kids? ▼
For children and teenagers, BMI is interpreted differently. It uses "percentiles" compared to other children of the same age and sex. Our calculator is designed for adults (18+).