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:

BMI 14 BMI 15 BMI 16 BMI 17 BMI 18 BMI 19 BMI 20 BMI 21 BMI 22 BMI 23 BMI 24 BMI 25 BMI 26 BMI 27 BMI 28 BMI 29 BMI 30 BMI 31 BMI 32 BMI 33 BMI 34 BMI 35 BMI 36 BMI 37 BMI 38 BMI 39 BMI 40 BMI 41 BMI 42 BMI 43 BMI 44 BMI 45 BMI 46 BMI 47 BMI 48