⚖️
Calculators
BMI Calculator
Calculate your Body Mass Index (BMI) using height and weight. Supports metric and imperial units. Free, instant, no sign-up.
—
Your BMI
—
Category
—
Healthy Weight Range
Underweight
<18.5 Normal
18.5–25 Overweight
25–30 Obese
30+
<18.5 Normal
18.5–25 Overweight
25–30 Obese
30+
⚠️ BMI is a screening tool only. Consult a healthcare professional for a comprehensive health assessment.
How to Use
Choose your units
Select metric (kg/cm) or imperial (lbs/ft+in).
Enter height & weight
Type in your height and weight.
See your BMI
Your BMI and category appear instantly along with your healthy weight range.
Frequently asked
questions
BMI (Body Mass Index) is a measure calculated from your height and weight. It is used as a screening tool to identify weight categories that may lead to health problems. Formula: BMI = weight(kg) / height(m)².
Underweight: below 18.5 | Normal weight: 18.5–24.9 | Overweight: 25–29.9 | Obese: 30 or above. These categories are defined by the World Health Organization (WHO).
BMI is a useful screening tool but not a diagnostic measure. It does not account for muscle mass, bone density, age, or ethnicity. Athletes may have a high BMI despite low body fat. Consult a doctor for a full health assessment.
A BMI between 18.5 and 24.9 is considered normal/healthy for most adults. The healthy weight range varies based on your height.