BMI Calculator – Body Mass Index
Calculate your Body Mass Index to assess your weight category
For informational purposes only. Not a substitute for professional medical advice.
Table of Contents
How to Use
- Enter your weight in kilograms or pounds
- Enter your height in centimeters or feet/inches
- Click calculate to see your BMI result
- Review your weight category and recommendations
What is BMI?
Body Mass Index (BMI) is a measure of body fat based on height and weight that applies to adult men and women. It's calculated by dividing your weight in kilograms by your height in meters squared (kg/m²).
BMI is widely used as a screening tool to categorize individuals into different weight categories and assess potential health risks associated with weight.
BMI Categories
| BMI Range | Category | Health Risk |
|---|---|---|
| Below 18.5 | Underweight | Increased risk of nutritional deficiency |
| 18.5 - 24.9 | Normal weight | Lowest health risk |
| 25.0 - 29.9 | Overweight | Increased risk of health problems |
| 30.0 and above | Obese | High risk of health problems |
BMI Limitations
While BMI is a useful screening tool, it has several limitations:
- It doesn't distinguish between muscle mass and fat mass
- It may not be accurate for athletes with high muscle mass
- It doesn't account for body fat distribution
- Results may vary by age, sex, and ethnicity
- It's not suitable for pregnant women, children, or elderly individuals
Always consult with a healthcare professional for comprehensive health assessments.
Tips for Maintaining a Healthy Weight
- Eat a balanced diet rich in fruits, vegetables, whole grains, and lean proteins
- Practice portion control and mindful eating
- Stay physically active with regular exercise
- Get adequate sleep (7-9 hours per night)
- Manage stress through healthy coping mechanisms
- Stay hydrated by drinking plenty of water
- Limit processed foods, sugary drinks, and excessive alcohol
- Regular health check-ups with your healthcare provider
Frequently Asked Questions
- What BMI range is considered healthy?
- Adults are generally considered at a healthy weight when their BMI falls between 18.5 and 24.9. Results outside that range are a prompt to discuss next steps with a healthcare professional.
- Does BMI account for muscle mass or body composition?
- No. BMI only compares weight and height, so muscular people can appear in the overweight range even with low body fat. Combine BMI with waist measurements or body composition tests for a fuller picture.
- Can I use this BMI calculator for children or during pregnancy?
- This calculator is intended for non-pregnant adults. Children, teens, or pregnant people need specialized growth charts and guidance from a healthcare provider.
- How often should I check my BMI?
- For general tracking, updating your BMI every few months is enough. Look for long-term trends alongside other health indicators instead of focusing on daily fluctuations.
Related Calculators
health
Ankle-Brachial Index (ABI) Calculator
health
Blood Alcohol Content (BAC) Calculator