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Remaining inches after the feet value above.

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How this is calculated

BMI = 703 × weight (lb) ÷ height (in)², the same as weight (kg) ÷ height (m)². CDC adult categories (age 20 and older): Underweight, below 18.5; Healthy weight, 18.5 to less than 25; Overweight, 25 to less than 30; Obesity, 30 or greater. Children and teens use BMI-for-age percentiles instead.

Assumptions

  • Uses CDC adult categories (age 20 and older). BMI is a screening measure, not a diagnosis, and does not reflect muscle mass or body composition.

Sources

Estimates for planning and education only. Not financial, tax or legal advice, and not an official government calculation. Calculations run in your browser; nothing you enter is stored or sent.

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How to use this calculator

Enter your weight in pounds and your height in feet and inches. The result is your BMI, the CDC adult category it falls in, and the weight range that corresponds to a healthy BMI for your height.

CDC adult BMI categories

BMICategory
Less than 18.5Underweight
18.5 to less than 25Healthy weight
25 to less than 30Overweight
30 or greaterObesity
For adults 20 and older. Source: CDC.

Example

For someone who is 5 feet 9 inches tall (69 inches), a BMI from 18.5 to under 25 corresponds to roughly 125 to 169 pounds. At 150 pounds their BMI is 22.1; at 180 pounds it is 26.6.

Healthy weight by height (BMI chart for adults)

HeightHealthy weight (BMI 18.5–24.9)Overweight starts at
4’10”89–119 lb120 lb
5’0″95–128 lb129 lb
5’2″101–136 lb137 lb
5’3″104–141 lb142 lb
5’4″108–145 lb146 lb
5’5″111–150 lb151 lb
5’6″115–154 lb155 lb
5’7″118–159 lb160 lb
5’8″122–164 lb165 lb
5’9″125–169 lb170 lb
5’10”129–174 lb175 lb
5’11”133–179 lb180 lb
6’0″136–184 lb185 lb
6’1″140–189 lb190 lb
6’2″144–194 lb195 lb
6’4″152–205 lb206 lb
Calculated from the CDC adult categories for ages 20 and older. The same ranges apply to adult women and men.

BMI is a quick screening number, not a diagnosis. It doesn’t measure body fat directly or account for muscle, so very muscular people can show a high BMI. Children and teens use BMI-for-age percentiles instead. Talk with a health professional about what your number means for you.

Frequently asked questions

How is BMI calculated?

BMI equals weight in kilograms divided by height in meters squared. In U.S. units, that is 703 times weight in pounds divided by height in inches squared.

What is a healthy BMI for adults?

The CDC classifies a BMI of 18.5 to less than 25 as healthy weight for adults 20 and older.

Is BMI different for women and men?

Not for adults. The CDC says adult BMI categories are based on BMI regardless of age, sex or race, so the chart above applies to both. For children and teens, BMI is interpreted by age and sex.

Is BMI accurate for muscular people or athletes?

Less so. BMI uses only height and weight, so it can't tell muscle from fat. A very muscular person can have a BMI in the overweight range without excess body fat. A health professional can use other measures.

What is a healthy weight for a 5'5" woman?

For an adult who is 5'5", a BMI of 18.5 to 24.9 corresponds to about 111 to 150 pounds. The same range applies to men of that height.

Does BMI work for children?

Not with these categories. For children and teens, the CDC uses BMI-for-age percentiles that account for age and sex.

Sources

  1. Centers for Disease Control and Prevention — Adult BMI Categories (opens in a new tab)