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How do I know if I have a healthy body weight?

A healthy body weight is different for everyone. If you're not sure what's healthy for you, check with your doctor.

What is BMI?

The body mass index (BMI) is a tool that can help healthcare professionals decide when adults may be at risk for developing health problems because they are underweight or overweight. The BMI uses a chart based on height and weight.

Enter your height and weight below to find your BMI. Be sure to use a scale and measuring tape for these measurements – don't estimate.

This BMI tool is for adults over 18. Pregnant or breastfeeding women should not use this tool.

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What your BMI means

BMI (kg/m2) Group
less than 18.5 underweight
18.5 to 24.9 normal weight
25 to 29.9 overweight
30 or more obese

The BMI isn't perfect

While there are some drawbacks to using the BMI as a tool to measure healthy body weight, it is still a helpful tool when talking about weight and goals with your doctor. Some things to remember:

  • The BMI calculation uses weight and height to estimate – not exactly measure – body fat.
  • BMI and body fat are different for men and women.
  • BMI may not reflect the changes to body fat and muscle mass that happen as people age.
  • Lean people with high muscle mass, such as athletes, may have high BMI scores.

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