About BMI
BMI (Body Mass Index) is a widely used health assessment tool to determine if a person has a healthy weight for their height.
- BMI helps assess health risks related to weight
- BMI is widely used in healthcare and health research
- BMI is an initial screening tool, not a replacement for comprehensive medical evaluation
How to Calculate BMI
The BMI formula is simple, you only need to know your height and weight:
BMI = Weight (kg) / [Height (m)]²
Example: If you weigh 70kg and are 1.70m tall, BMI = 70 / (1.70)² = 24.2
CDC BMI Standards
The Centers for Disease Control and Prevention (CDC) provides BMI standards for different age groups:
Adults (18+ years)
BMI < 18.5: Underweight BMI 18.5-24.9: Normal weight BMI 25-29.9: Overweight BMI ≥ 30: Obese
Children (2-17 years)
BMI-for-age percentile charts are used instead of standard BMI categories. Consult a pediatrician for accurate assessment.
Frequently Asked Questions
Is BMI accurate?
BMI is a useful initial screening tool, but it's not a perfect indicator. BMI doesn't distinguish between muscle mass and fat, so it may not be accurate for athletes or people with high muscle mass. For accurate health assessment, you should consult a doctor.
Does BMI apply to children?
No, standard BMI only applies to adults (18 years and older). Children and adolescents need to use BMI-for-age percentile charts for more accurate assessment.
What should I do if my BMI is not in the normal range?
If your BMI is not in the normal range, consult a doctor or nutritionist. They can help you assess your overall health and create a weight management plan that suits your individual needs.