What is a healthy BMI range?

A BMI between 18.5 and 24.9 is generally considered healthy for most adults. However, optimal BMI can vary based on age, sex, ethnicity, and muscle mass.

BMI is a useful screening tool but has limitations. It doesn't account for muscle mass, bone density, or fat distribution. Athletes may have high BMI due to muscle mass without being overweight.

How do I calculate BMI?

BMI is calculated by dividing weight in kilograms by height in meters squared (kg/m²). In imperial units, multiply weight in pounds by 703 and divide by height in inches squared.

Does BMI differ for men and women?

The same BMI formula and categories apply to both men and women. However, women typically have more body fat than men at the same BMI.

BMI Calculator

Modify the values and click Calculate to use.

Inputs

BMI = 24.2 kg/m²

Normal weight

1018.5253040+

CategoryNormal weight

Healthy BMI range: 18.5 – 24.9 kg/m²
Healthy weight for the height: —
BMI Prime: —
Ponderal Index: — kg/m³

Examples

Click an example to populate the calculator (metric units).

Our free BMI (Body Mass Index) calculator helps you quickly determine whether your weight is within a healthy range based on your height. BMI is a widely-used metric for assessing body weight relative to height.

What is BMI?

Body Mass Index (BMI) is a measure of body fat based on height and weight. It applies to adult men and women and provides a useful indicator of overall health risk associated with body weight.

BMI Categories

Underweight: BMI less than 18.5
Normal weight: BMI 18.5 to 24.9
Overweight: BMI 25 to 29.9
Obese: BMI 30 or greater

Limitations

BMI doesn't distinguish between muscle and fat mass, so very muscular individuals may have a high BMI despite having low body fat. Always consult a healthcare professional for personalized health advice.