Saúde
IMC
Utilities
BMI
weight and height
Calculate your Body Mass Index by entering your weight and height to find your classification range. BMI is a general indicator used by health professionals — always consult a doctor for a complete assessment.
How to use
- 1Enter your weight in kilograms in the 'Weight' field.
- 2Enter your height in centimeters in the 'Height' field.
- 3Your BMI is calculated automatically as soon as you type both values.
- 4Compare the result with the displayed classification range (underweight, normal weight, overweight, or obesity).
Practical examples
Person weighing 70 kg at 1.75 m
BMI comes out to about 22.9 — within the WHO's normal weight range (18.5–24.9).
Person weighing 90 kg at 1.70 m
BMI comes out to about 31.1 — classified as obesity class I.
Tracking progress over time
Recalculate your BMI every few weeks and log it alongside your weight to follow your trend.
Frequently asked questions
What BMI is considered normal?
According to the WHO, a BMI between 18.5 and 24.9 is considered normal weight. Below 18.5 indicates underweight; 25–29.9 is overweight; above 30 is obesity.
Is BMI valid for children?
The adult BMI formula does not apply directly to children. For those under 18, there are specific tables by age and sex.
Does BMI alone determine if I am healthy?
No. BMI is an estimate and does not account for factors like muscle mass, fat distribution, and other health indicators. Always consult a professional.