Understanding Your BMI
What is BMI?
Body Mass Index (BMI) is a simple measurement using your height and weight to work out if your weight is healthy. While it isn't perfect and doesn't measure body fat directly, it's a useful screening tool that can indicate whether you might be at risk for weight-related health issues.
BMI Categories and What They Mean
Underweight: Less than 18.5 BMI
May indicate nutritional deficiencies, weakened immune system, or other health concerns.
Normal Weight: 18.5 to 24.9 BMI
Associated with the lowest risk of weight-related health problems.
Overweight: 25 to 29.9 BMI
May increase risk of heart disease, high blood pressure, and type 2 diabetes.
Obese: Over 30 BMI
Higher risk of serious health conditions including heart disease, diabetes, and certain cancers.
Calculate Your BMI
Use our calculator below to find out your BMI. Simply enter your weight and height to get started.
Know your BMI? Go straight there.
Important Considerations About BMI
Limitations of BMI
- BMI doesn't distinguish between weight from muscle and weight from fat
- Athletes and very muscular people may have a high BMI but not be overweight
- BMI may not be accurate for elderly people or those who have lost muscle
- Different ethnic groups may have different healthy BMI ranges
Tips for Maintaining a Healthy BMI
Healthy Eating
- Eat plenty of fruits and vegetables
- Choose whole grains over refined grains
- Include lean proteins in your diet
- Limit processed foods and added sugars
Physical Activity
- Aim for 150 minutes of moderate exercise weekly
- Include both cardio and strength training
- Stay active throughout the day
- Find activities you enjoy
Common BMI Examples
Low BMI Range (16-18)
Common in endurance athletes and those who may need to gain weight for better health.
Learn more about BMI 17 →Healthy BMI Range (20-25)
The ideal range for most adults, associated with good health outcomes.
Learn more about BMI 22 →Higher BMI Range (27-30)
Common in muscular athletes or those who may benefit from lifestyle changes.
Learn more about BMI 28 →All BMI Information
Looking for information about a specific BMI? Browse all our BMI fact sheets below: