BMI Calculator

Your Body Mass Index (BMI) is a quick screening number that relates your weight to your height. Enter your measurements in metric or imperial units and this calculator returns your BMI and the standard weight category it falls into.

Weight

Height

Your BMI

22.9

CategoryNormal weight

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Sources & methodology

Last reviewed January 15, 2026.

Method: BMI = weight (kg) ÷ height (m)², using the standard WHO adult classification: under 18.5 underweight, 18.5–24.9 healthy, 25–29.9 overweight, 30+ obese.

How it works

BMI is calculated as:

BMI = weight (kg) ÷ height (m)²

For imperial units: BMI = 703 × weight (lb) ÷ height (in)². The standard adult categories are: under 18.5 underweight, 18.5 to 24.9 normal weight, 25 to 29.9 overweight, and 30 or above obese.

Frequently Asked Questions

What is a healthy BMI range?

For most adults a BMI between 18.5 and 24.9 is considered the normal, healthy range.

Is BMI accurate for everyone?

BMI is a general screening tool and does not measure body fat directly. It can be misleading for very muscular people, athletes, the elderly and children, so treat it as a guide only.

Can I use pounds and inches?

Yes. Switch the unit toggle to imperial to enter your weight in pounds and your height in feet and inches.

BMI Calculator

How it works

Frequently Asked Questions

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