BMI FOR
WOMEN.

Calculate and read your result

The adult BMI calculator uses height and weight. Select centimetres or feet and inches for height, then kilograms or pounds for weight. Check the units before calculating: entering pounds in the kilogram field produces a different result.

The same adult formula applies to women and men: weight in kilograms divided by height in metres squared. Selecting a guide does not change the calculation. For example, 70 kg and 1.75 m gives a BMI of approximately 22.9.

For adults aged 20 and older, the CDC categories are underweight below 18.5, healthy weight from 18.5 to less than 25, overweight from 25 to less than 30, and obesity at 30 or above. A category is a screening reference, not a diagnosis or a personal target.

Context for women

A BMI result cannot describe how fat and muscle are distributed in your body. Two women of the same height and weight receive the same score even when their strength, body composition and medical histories differ.

Pregnancy requires separate weight guidance. Do not use the calculator’s displayed healthy weight range as a pregnancy weight target. Discuss pregnancy and postpartum weight questions with your maternity care team, who can interpret measurements in context.

If you are comparing results across life stages, remember that BMI records only the relationship between height and weight. It cannot explain why your weight changed or assess symptoms, fitness or nutritional needs.

Use the number in context

Check an unexpected result by reviewing the height, weight and selected units. To compare measurements over time, use a consistent measurement method and record the date. A single reading does not explain a longer-term change.

If you want help interpreting your result, bring your measurements and questions to a qualified healthcare professional. They can consider your medical history, physical examination and other health measures before recommending any next steps.

Learn more from the CDC adult BMI categories and CDC explanation of BMI and its limitations. For people under 20, use age- and sex-specific guidance rather than this adult interpretation.

See the BMI guide for men for additional context, or return to the calculator to check your entries.