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BMI Calculator

Calculate your body mass index from your height and weight and see the standard adult BMI category.

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BODY DETAILS

Enter your measurements.

Enter your height and weight to calculate your body mass index.

cm
kg
Formula
BMI = weight ÷ height²
Height is converted from centimetres to metres before the calculation.
YOUR BMI
22.49
Healthy range

Within the standard adult BMI range.

Height170 cm
Weight65 kg
Standard BMI range18.5 – 24.9
WEIGHT RANGE

Estimated weight range at your height.

Based on the standard adult BMI range of 18.5 to 24.9, the estimated weight range for your entered height is:

53.46 – 71.96 kg

This is a mathematical BMI-based range, not an individualized medical recommendation.

QUICK EXAMPLES

Try common measurements.

Select an example to instantly change the calculation.

BMI GUIDE

Standard adult BMI categories.

Underweight
Below 18.5
Healthy range
18.5 – 24.9
Overweight
25.0 – 29.9
Obesity range
30.0+
HOW BMI WORKS

A simple height-to-weight measure.

BMI is calculated by dividing weight in kilograms by height in metres squared. It is commonly used as a screening measure for adults.

BMI = kg ÷ m²
Example: 65 kg at 1.70 m gives a BMI of approximately 22.49.
IMPORTANT CONTEXT

BMI is only one measure.

BMI does not directly measure body fat and does not account for factors such as muscle mass, body composition, age or individual health circumstances.

Use BMI as a screening tool, not a diagnosis.
If you have concerns about your weight or health, a qualified healthcare professional can interpret your measurements in context.

This calculator uses standard adult BMI categories. BMI interpretation can differ for children, adolescents, pregnancy, athletes and some other situations. This tool is for general informational purposes and is not medical advice.

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FAQ

BMI calculator questions

What is BMI?

BMI, or body mass index, is a screening measure calculated from a person's weight and height. It is commonly used for adults to categorize weight relative to height.

What is considered a healthy adult BMI?

The standard adult BMI range commonly classified as healthy is 18.5 to 24.9. BMI should be interpreted in context rather than treated as a diagnosis.

Is BMI accurate for everyone?

No. BMI does not directly measure body fat or account for body composition. It can be less informative for some athletes, children, adolescents, pregnant people and other situations.

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