BMI Calculator

Find your body mass index from your height and weight, see which category it falls in, and view a healthy weight range for your height.

Check your body mass index from your height and weight and find out whether your weight sits in a healthy range. This free BMI calculator works for men and women, in metric (kg and cm) or imperial (pounds and feet), and shows your category alongside the healthy weight range for your height.

Read the guide: What Your BMI Really Tells You (and What It Doesn't)

Your measurements

Units

Your BMI

22.9

Normal

Category
Normal
Healthy weight range
56.7 kg – 76.3 kg

BMI is a general screening tool and doesn't distinguish muscle from fat. It's informational, not medical advice — talk to a clinician about your health.

How it works

  1. 1

    Pick your units

    Switch between metric (kg, cm) and imperial (lb, ft) to suit you.

  2. 2

    Enter height and weight

    Type your measurements; the BMI updates as you go.

  3. 3

    Read your category

    See your BMI, its category and the healthy weight range for your height.

Instant & 100% private — nothing is uploaded

Every calculation runs locally in your browser. The measurements, dates and details you enter stay on your own device and are never sent to a server — nothing is stored, logged or shared.

Frequently asked questions

What is a healthy BMI?
For most adults, a BMI between 18.5 and 24.9 is considered healthy. Below 18.5 is underweight, 25 to 29.9 is overweight, and 30 or above is obese.
Is BMI accurate for everyone?
BMI is a quick screen, not a full picture. It does not separate muscle from fat, so very muscular people can read as "overweight", and it works differently across ages and ethnicities.
How do I work out my BMI by hand?
BMI is your weight in kilograms divided by your height in metres squared. This calculator does the maths for you in metric or imperial, so you only enter your height and weight and read off the number.

Important

These calculators give general, informational estimates and are not medical advice, diagnosis or treatment. Everyone is different — for decisions about your health, talk to a qualified clinician.

More tools

Body Fat CalculatorBody fat percentage from the US Navy measurement method.Ideal Weight CalculatorA healthy target weight range for your height.Lean Body Mass CalculatorLean (fat-free) mass and fat mass from height and weight.Waist-to-Hip Ratio CalculatorWaist-to-hip ratio and your WHO health-risk band.BMR CalculatorCalories your body burns at rest (Mifflin-St Jeor).TDEE CalculatorTotal daily calories burned, from BMR and activity.

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