BMI Calculator
Calculate BMI from your height and weight. This is a general calculation tool, not medical advice.
Enter your values, then press the button below:
How BMI is calculated
BMI is calculated by dividing weight in kilograms by height in meters squared.
BMI = weight (kg) ÷ height² (m)
BMI categories
Common adult categories are: under 18.5 underweight, 18.5 to 24.9 healthy weight, 25 to 29.9 overweight, and 30 or above obesity.
Important note
BMI is a general screening measure and does not account for every factor that affects health or body composition. Do not use this calculator as a diagnosis.
Frequently asked questions
What is a healthy BMI?
For most adults, a BMI from 18.5 to 24.9 is considered in the healthy weight range. This is a general guide, not a diagnosis.
Is BMI accurate for everyone?
Not always. BMI does not separate muscle from fat and does not reflect age, sex, or body build. Talk to a healthcare professional about your own health.
How do I convert feet and inches to centimeters?
Use our height converter, then enter the centimeter result here.