BMI Calculator

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Health / Adult screening tool

BMI Calculator

Calculated only in your browser

Height

170 cm
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Weight

70 kg
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Your result

Estimated BMI

24.2

Healthy range

BMI 18.5–24.9 at 170 cm

54–72 kg
Underweight Below 18.5
Healthy range 18.5–24.9
Overweight 25.0–29.9
Obesity range 30.0 or above

For adults aged 20 and older. BMI is a screening measure, not a diagnosis. Controls cover 100–250 cm and 15–350 kg, or 3′ 3″–8′ 2″ and 33–772 lb.

How it works

Calculate your adult BMI in three steps

This calculator uses the standard adult BMI formula: weight in kilograms divided by height in metres squared.

  1. 01
    Choose your units.

    Use centimetres and kilograms, or switch to feet, inches, and pounds.

  2. 02
    Set your measurements.

    Scroll, swipe, use the arrow keys, or tap the plus and minus controls.

  3. 03
    Read the estimate.

    See your BMI, adult category, and the BMI 18.5–24.9 weight range at your height.

01 / Meaning

Understand what your BMI result means

BMI compares weight with height. It can be a useful starting point for adults, but it does not directly measure body fat or overall health.

02 / Categories

Compare your result with adult BMI ranges

For adults aged 20 and older, the CDC lists below 18.5 as underweight, 18.5 to below 25 as healthy weight, 25 to below 30 as overweight, and 30 or above as obesity.

Read the CDC adult BMI guidance ↗

03 / Limits

Know when BMI needs more context

BMI can be less informative during pregnancy, for highly muscular people, and for children and teenagers. Discuss health concerns with a qualified healthcare professional.