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BMI Calculator – Check Your Body Mass Index

Enter your height and weight to see your BMI, what it means and a healthy weight range for your height. Works in centimetres and kilograms or feet and pounds.

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People of South Asian, East Asian and South-East Asian background have a higher health risk at lower BMIs, so the WHO suggests lower thresholds (23 and 27.5).

Enter your height and weight to calculate your BMI.

How to calculate your BMI

  1. Choose your units: metric (centimetres and kilograms) or imperial (feet, inches and pounds).
  2. Enter your height and weight. Decimals work with a point or a comma, so 68.5 and 68,5 are the same. Your result appears as soon as both are filled in.
  3. Switch on Asian cut-offs if you are of South Asian, East Asian or South-East Asian background.
  4. Read your result: your BMI, its category, where it sits on the scale, and the healthy weight range for your height.

Features

  • Metric and imperial units, with automatic conversion.
  • Instant result that updates as you type.
  • Colour-coded scale showing exactly where your BMI falls.
  • Healthy weight range for your height, in kilograms or pounds.
  • WHO cut-offs for Asian populations, rarely offered by other BMI calculators.
  • Clear guidance on what BMI can and can't tell you.

Why use Fileora's BMI calculator

Most BMI calculators use a single set of thresholds designed mainly around European populations. For many people in Pakistan, India, Bangladesh and across Asia, health risks begin at a lower BMI, and a result of 24 that looks "healthy" on a standard chart may already call for attention. Fileora lets you apply the lower thresholds recommended by the WHO with one switch, and explains why.

The tool is free, works on any phone, and doesn't collect your measurements. There's no sign-up, and nothing is sent to a server.

Other everyday calculators: work out an exact age with the age calculator, or generate a secure password for a fitness app account with the password generator.

Understanding your result

If your BMI is in the healthy range, you're at lower risk of weight-related conditions, though diet, activity and other factors still matter. If it's above the healthy range, even a modest weight loss of 5–10% can improve blood pressure, blood sugar and cholesterol. If it's below 18.5, it may be worth discussing with a doctor, as being underweight can also affect health. In every case, BMI is a starting point for a conversation with a healthcare professional, not a verdict.

This tool provides general information only and isn't medical advice. Read our disclaimer for more.

Frequently asked questions

How is BMI calculated?

BMI is your weight in kilograms divided by your height in metres squared. For example, 70 kg at 1.75 m gives 70 ÷ (1.75 × 1.75) = 22.9. If you enter feet, inches and pounds, the calculator converts them to metric first.

What is a healthy BMI?

For most adults the World Health Organization classes a BMI under 18.5 as underweight, 18.5 to 24.9 as a healthy weight, 25 to 29.9 as overweight and 30 or more as obese.

Why are there different cut-offs for Asian populations?

Research shows that people of South Asian, East Asian and South-East Asian background tend to develop type 2 diabetes and heart disease at lower BMIs. A WHO expert consultation therefore suggested lower action points: 23 for increased risk and 27.5 for high risk. Health services in Pakistan, India and several other countries use these thresholds. Switch them on with the toggle.

Is BMI accurate for everyone?

BMI is a quick screening measure, not a diagnosis. It doesn't distinguish muscle from fat, so athletes can score as overweight, and it doesn't show where fat is stored. Waist measurement, body composition and a doctor's assessment give a fuller picture.

Can children use this BMI calculator?

No. For children and teenagers under 18, BMI has to be compared against growth charts for their age and sex. This calculator uses adult categories, so talk to a doctor or use a paediatric BMI chart for anyone under 18.

Are my height and weight saved?

No. The calculation happens in your browser. Nothing you enter is stored or sent to us.

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