Use this BMI calculator as one small screening measure—not a verdict on your health or your body. It cannot show the full picture of body composition or menopause-related changes.
The World Health Organization defines four standard BMI categories for adults aged 18 and over.
Get your BMI result in three simple steps — no account or registration needed.
Select metric (kg/cm) or imperial (lb/ft) depending on your preference.
Type your height and weight accurately for the most precise result.
Click Calculate and see your BMI score and category instantly.
Read what your result means and what steps you can take next.
Understand what BMI means, how it affects your health, and what you can do about it.
A complete guide to understanding Body Mass Index and how it is calculated.
How healthy BMI ranges change as you get older and what the numbers really mean.
Realistic, science-backed strategies to move towards a healthier weight.
BMI does not know whether you have lost muscle or gained fat, and it cannot see what happens to a woman's body through perimenopause and menopause — the weight that settles around the middle without any change in how you eat, the sleep that stops working, the energy that does not come back after a full night.
If the number surprised you, the next question is usually not how much do I weigh but what is happening to me. That is what these guides are for.
Why BMI is not enough · BMI vs body fat percentage · How BMI changes with age · How to calculate BMI yourself · The health risks of excess weight after 50
BMI is a screening measure based on height and weight. It can be one part of a health conversation, but it does not directly measure body fat, muscle, fat distribution, or overall health.
The transition through midlife can coincide with changes in body composition and where fat is stored, but BMI alone cannot show what is happening for an individual. A healthcare professional can interpret it alongside your history, measurements, and other relevant information.
No single number gives a complete picture. If you have questions about weight, waist measurements, or health risks, discuss them with a qualified healthcare professional. This calculator is educational and is not a diagnosis.