What is BMI

BMI, or body mass index, is a way of comparing your weight to the healthy weight for your height. A healthy BMI is from 18.5 to 25. Anything lower suggests that you are underweight and anything higher suggests that you are overweight. BMI is correlated with how much body fat you have.

Your BMI may not accurately reflect your health. For instance, women tend to have a higher BMI than men because women have more body fat on average. This means that women can have a higher-than-average BMI and still be healthy. Nevertheless, BMI is a good starting point to figure out how healthy you are.

Body Mass Index Calculator

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Weight

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BMI Table

The BMI table gives you the ranges for each weight category. You can use the BMI calculator above to calculate your BMI and look it up on this table. For children and teens under age 20, this table doesn't apply. Here's more information on calculating BMI for children versus adults. Use the calculator above if you're under 20.

BMICategory
under 15Very severely underweight
15 to 16Severely underweight
16 to 18.5Underweight
18.5 to 25Healthy weight
25 to 30Overweight
30 to 35Moderately obese
35 to 40Severely obese
over 40Very severely obese