BMI Calculator
Use this BMI calculator to calculate your Body Mass Index using your weight and height. This calculator is intended for adults and is provided for educational and informational purposes.
Calculate Your BMI
What Is BMI?
Body Mass Index (BMI) is a simple measurement calculated from a person's weight and height. It is commonly used as a screening tool to categorize weight status in adults.
BMI Formula:
BMI = Weight (kg) ÷ Height² (m²)
Adult BMI Categories
| BMI | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Healthy weight |
| 25.0 – 29.9 | Overweight |
| 30.0 or above | Obesity |
Example BMI Calculation
For example, a person weighing 70 kg with a height of 170 cm has a BMI of approximately 24.2.
What Does BMI Tell You?
BMI can provide a general screening estimate of weight status. However, BMI does not directly measure body fat and should not be considered a diagnosis by itself.
Limitations of BMI
- BMI does not directly measure body fat.
- It does not distinguish muscle from fat.
- Muscular individuals may have a higher BMI because of their muscle mass.
- BMI may not fully reflect body composition in older adults.
- Children and teenagers require age- and sex-specific interpretation.
BMI for Children
This calculator uses adult BMI categories. BMI in children and adolescents should generally be interpreted using age- and sex-specific growth charts rather than adult BMI categories.
Frequently Asked Questions
What is a normal BMI?
For adults, a BMI from 18.5 to 24.9 is commonly classified as the healthy weight range.
Does BMI measure body fat?
No. BMI is calculated from height and weight and does not directly measure body-fat percentage.
Can a muscular person have a high BMI?
Yes. BMI does not distinguish muscle mass from fat mass, so muscular individuals can have a higher BMI.
Can this calculator be used for children?
This calculator is intended for adult BMI calculations. Children and adolescents require age- and sex-specific interpretation.
Medical Disclaimer:This calculator is intended for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. If you have concerns about your weight or health, consult a qualified healthcare professional.