BMI Calculator
Check your Body Mass Index in metric or imperial.
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What is BMI?
Body Mass Index (BMI) is a simple measure that uses your height and weight to estimate whether you're in a healthy weight range. It's calculated as weight in kilograms divided by height in metres squared (kg/m²).
BMI categories
- Under 18.5 — Underweight
- 18.5 – 24.9 — Normal weight
- 25 – 29.9 — Overweight
- 30 and above — Obese
Important
BMI is a general guide, not a diagnosis. It doesn't account for muscle mass, body composition, age or ethnicity, so very muscular people may read as "overweight." Always talk to a healthcare professional about your individual health.
Frequently asked questions
How is BMI calculated?
BMI is your weight in kilograms divided by your height in metres squared (kg/m²). The tool also supports feet, inches and pounds.
What is a healthy BMI?
A BMI between 18.5 and 24.9 is considered the normal range for most adults.
Is BMI accurate for everyone?
BMI is a general guide and does not account for muscle mass or body composition, so it is not a diagnosis. Speak to a healthcare professional for personal advice.