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BMI Calculator

Calculate your Body Mass Index and understand your weight category with a simple, clear result.

Instant calculation • Metric and imperial units • No registration
BODY MASS INDEX

Check your BMI

Enter your height and weight. Age and sex are included for context, but adult BMI uses height and weight.

YOUR BMI24.2
Healthy range

Within the commonly used healthy BMI range for adults.

YOUR RESULT

Healthy weight range estimate

For your height, the commonly used adult BMI range of 18.5 to 24.9 corresponds to:

Height170 cm
Current weight70 kg
Healthy range53.5–72 kg
BMI SCALE

How the categories are commonly interpreted

Below 18.5Underweight
18.5–24.9Healthy range
25–29.9Overweight
30 and aboveObesity range
BMI GUIDE

What is BMI?

Body Mass Index is a screening measure based on weight relative to height. It can help describe broad weight categories for adults, but it does not directly measure body fat or overall health.

How is BMI calculated?

BMI is calculated as weight in kilograms divided by height in metres squared. The calculator converts imperial inputs before applying the same formula.

What is a healthy BMI?

For many adults, a BMI from 18.5 to 24.9 is commonly described as the healthy range. Individual context matters, including muscle mass, age, medical history and ethnicity.

Use BMI as a guide

BMI is not a diagnosis. Speak with a qualified healthcare professional for personal health advice, especially for children, pregnancy, athletes or medical conditions.

BMI Calculator FAQs

What does BMI mean?

BMI compares weight with height, but interpretation depends on individual context.

Is BMI the same for everyone?

BMI compares weight with height, but interpretation depends on individual context.

Can BMI diagnose health problems?

No. BMI is a screening measure, not a diagnosis. A healthcare professional can interpret it with other information.

Can I use pounds and inches?

Yes. Select Imperial and enter height in inches and weight in pounds.

What is a healthy BMI range?

For many adults, 18.5 to 24.9 is commonly used as a reference range.

BMI is a general screening measure and should not replace medical advice. Results can be less informative for children, pregnancy, athletes and people with high muscle mass.

HOW IT WORKS

Calculate BMI from height and weight.

Enter your measurements to calculate BMI and view the associated category.

  1. 1. Choose measurement units

    Select metric or imperial units as needed.

  2. 2. Enter your measurements

    Provide your height and weight.

  3. 3. Review your BMI

    See the calculated value and its general category.