Use our BMI calculator to determine your Body Mass Index, a numerical value of your weight in relation to your height. BMI is a useful indicator of whether you're at a healthy weight, underweight, overweight, or obese.
Calculate Your BMI
Enter your weight in kilograms and height in centimeters to calculate your BMI.
Understanding Your BMI Results
| BMI Range | Weight Classification |
|---|---|
| Below 18.5 | Underweight |
| 18.5 - 24.9 | Normal weight |
| 25.0 - 29.9 | Overweight |
| 30.0 - 34.9 | Obesity (Class 1) |
| 35.0 - 39.9 | Obesity (Class 2) |
| 40.0 and above | Obesity (Class 3) |
What Your BMI Means
Underweight (BMI below 18.5)
Being underweight can indicate nutritional deficiencies or underlying health conditions. Consider consulting a healthcare professional who may recommend:
- Nutrient-dense foods to increase caloric intake
- Strength training to build muscle mass
- Medical evaluation to identify potential underlying causes
Normal Weight (BMI 18.5 - 24.9)
A BMI in this range indicates that your weight is generally appropriate for your height. Focus on maintaining your weight through:
- Balanced nutrition with plenty of whole foods
- Regular physical activity
- Healthy lifestyle habits
Overweight (BMI 25.0 - 29.9)
Being overweight increases your risk for certain health conditions. Consider:
- Moderate calorie reduction (check our 5000 kilojoule diet or 7600 kilojoule diet)
- Increased physical activity
- Consulting with a healthcare professional for personalized advice
Obesity (BMI 30.0 and above)
Obesity significantly increases health risks, including heart disease, diabetes, and certain cancers. Consider:
- Comprehensive weight management under medical supervision
- Structured diet plan appropriate for your needs
- Regular exercise program designed for your condition
- Behavioral changes to support long-term weight management
Limitations of BMI
While BMI is a useful screening tool, it has several limitations you should be aware of:
- Muscle mass: BMI doesn't distinguish between muscle and fat. Athletes with high muscle mass may have an elevated BMI despite having healthy body composition.
- Body fat distribution: BMI doesn't account for where fat is stored. Abdominal fat (around the waist) carries more health risks than fat stored in other areas.
- Age considerations: The relationship between BMI and body fat changes with age. Older adults tend to have more body fat than younger adults with the same BMI.
- Ethnic variations: Different ethnic groups may have different body compositions at the same BMI level.
Important: Always consult with a healthcare provider before starting any weight management program. BMI is just one measure of health and should be considered alongside other factors and medical advice.