BMI Calculator
Calculate your Body Mass Index (BMI), find your weight category, and discover your healthy weight range. Supports both metric (cm, kg) and imperial (feet, inches, lbs) units.
Your Measurements
Your BMI
24.2
Normal Weight
BMI Scale
<18.5 Normal
18.5-24.9 Overweight
25-29.9 Obese
30+
Healthy Weight Range for Your Height
56.4 kg - 76.2 kg
BMI Categories
Understanding Body Mass Index (BMI)
Body Mass Index (BMI) is a widely used measurement that estimates body fat based on height and weight. While BMI doesn't directly measure body fat percentage, it serves as a useful screening tool to identify potential weight-related health risks.
How is BMI Calculated?
BMI is calculated using a simple formula:
- Metric: BMI = weight (kg) / [height (m)]²
- Imperial: BMI = [weight (lbs) / height (inches)²] × 703
BMI Categories Explained
According to Health Canada and the World Health Organization, BMI categories are:
- Underweight (BMI < 18.5): May indicate malnutrition or other health concerns
- Normal Weight (BMI 18.5-24.9): Considered healthy weight range for most adults
- Overweight (BMI 25.0-29.9): May increase risk of health problems
- Obese Class I (BMI 30.0-34.9): Increased health risk
- Obese Class II & III (BMI ≥ 35.0): High to very high health risk
Limitations of BMI
While BMI is a useful screening tool, it has limitations:
- Doesn't distinguish between muscle mass and fat mass
- May not be accurate for athletes, bodybuilders, pregnant women, or elderly individuals
- Doesn't account for bone density or body composition
- May vary by age, sex, and ethnicity
BMI should be used as one of several indicators of health. Consult with a healthcare professional for a comprehensive health assessment.
Maintaining a Healthy Weight
If your BMI falls outside the normal range, consider these evidence-based approaches:
- Consult with a healthcare provider or registered dietitian
- Focus on balanced, nutrient-rich foods
- Engage in regular physical activity (150 minutes of moderate exercise per week)
- Get adequate sleep (7-9 hours for adults)
- Manage stress through healthy coping mechanisms
- Stay hydrated and limit processed foods
Important Health Disclaimer
This BMI calculator is provided for informational and educational purposes only. It should not be used as a substitute for professional medical advice, diagnosis, or treatment.
BMI is a screening tool and does not directly measure body fat or overall health. Individual health risks depend on many factors beyond BMI, including genetics, lifestyle, body composition, and medical history.
Always consult with a qualified healthcare provider before making any decisions about your health, nutrition, or fitness regimen. If you have concerns about your weight or health, speak with a doctor or registered dietitian.
This calculator uses standard BMI formulas and categories as defined by Health Canada and the World Health Organization (WHO).