BMI Calculator for Women
Enter your height and weight to see your BMI and which range it falls in. BMI is a quick screening number, not a diagnosis, so read it alongside the notes below. Nothing is stored.
Enter your height and weight to see your BMI and which range it falls in. BMI is a quick screening number, not a diagnosis, so read it alongside the notes below. Nothing is stored.
Your BMI
23.9 kg/m²
Healthy weightBMI is a quick screening number, not a diagnosis. It does not tell muscle from fat or account for where you carry weight, and it is not valid during pregnancy. Treat it as a starting point for a conversation with your doctor, and see our guide to unexplained weight change in women.
How it works
Enter your height and weight, and the tool returns your body mass index and the category it falls in.
The formula and sources
BMI is your weight in kilograms divided by your height in meters squared, or 703 times pounds divided by inches squared for imperial units. It uses the World Health Organization categories: under 18.5 is underweight, 18.5 to 24.9 is a healthy range, 25 to 29.9 is overweight, and 30 or above is obesity.
Assumptions
- You are an adult.
- BMI is used only as a quick screening number.
Limitations
BMI does not tell muscle from fat and does not measure where fat sits. It is less accurate for athletes, during pregnancy, and for older adults. It is a screening tool, not a diagnosis.
When to see a doctor
If you are worried about your weight or a change in it, discuss it with your doctor rather than acting on BMI alone. See our guides to weight gain and weight loss.
Primary sources
- World Health Organization, Obesity and overweight fact sheet, updated 8 December 2025. Sets the adult thresholds this tool uses: a BMI of 25 or above is overweight, 30 or above is obesity.
The formula is your weight in kilograms divided by your height in meters squared, or 703 times your weight in pounds divided by your height in inches squared.
Calculator version 1.0. Figures and formula last checked 27 July 2026 against the sources above. This tool gives general information and does not replace advice from your own doctor.
Frequently asked questions
Is BMI accurate for women?
BMI uses the same formula for everyone and does not account for muscle, body shape or where fat sits. It works as a rough population screen but is limited for any one person.
What is a healthy BMI for a woman?
18.5 to 24.9 is the healthy range in the WHO categories. Two women with the same BMI can still have very different body composition and health.
Why is my BMI high if I exercise a lot?
Muscle is denser than fat, so lean, very active women often read as overweight on BMI while being healthy. This is a well-known limit of the number.
Does BMI apply during pregnancy?
No. BMI is not used to track weight in pregnancy; your maternity team follows pregnancy-specific guidance instead. See our pregnancy weight gain calculator.