BMI Calculator
Calculate Body Mass Index (BMI) in metric or imperial units, with WHO category breakdown.
Your BMI
24.2
Normal
How to use BMI Calculator
- 1Pick metric or imperial units.
- 2Enter your height and weight.
- 3See your BMI and WHO category.
Frequently asked questions
What are the BMI categories?
Underweight (<18.5), Normal (18.5–24.9), Overweight (25–29.9), Obese (≥30).
Is BMI a medical diagnosis?
No — BMI is a screening indicator, not a diagnosis. Consult a health professional for medical advice.
Does it work offline?
The calculation runs entirely in your browser, so after the first load it works even with a spotty connection.
Is my data private?
Nothing you enter leaves your device. There is no server round-trip and nothing is logged.
Can I use it on mobile?
Yes — the tool is fully responsive on phones, tablets, and desktops.