About BMI Kalkulator
A free, fast body mass index calculator with no account, no paywall and no tracking beyond what keeps the site running.
BMI Kalkulator exists because the alternatives are frustrating. Most BMI tools are wrapped in pop-ups, require an email address, or bury the result under three screens of advertising. We built the opposite: a page that loads fast, works on a phone, and shows your result without asking for anything.
What the site does
The core calculator takes your height and weight in either metric or US units and returns your BMI, your category, the healthy weight range for your height, and how far you are from it. Around that we built a calorie calculator based on the Mifflin-St Jeor equation, a body fat estimate, reference charts, and the background reading you need to use the numbers sensibly.
How it is built
The site is plain HTML, CSS and JavaScript with no framework and no build step in the browser. Every calculator runs entirely on your device. Nothing you type into any field is sent to a server, stored in a database or shared with anyone. Your height and weight never leave your browser.
The only things saved on your device are your theme preference and your language choice, both stored in your browser and both removable at any time by clearing your browser data.
About the content
The health content is researched from public sources including the World Health Organization, the Centers for Disease Control and Prevention, and the published formulas behind each calculator. It is written to be accurate and readable rather than to sell anything. Where a topic is genuinely contested, such as the exact upper limit of a healthy BMI, we say so rather than picking a side.
We are not your doctor
Nothing on this site is medical advice, and no calculator can diagnose or rule out a condition. If you have a health concern, talk to a qualified professional who can examine you, run tests and know your history. See our medical disclaimer for the full statement.
Independence and trademarks
BMI Kalkulator is an independent website. It is not affiliated with, endorsed by or connected to the World Health Organization, the Centers for Disease Control and Prevention, the National Institutes of Health, or any hospital, clinic or health system. Names of organizations and standards are used only to describe the sources the content is based on. The BMI categories we display are published public standards, not proprietary information.
Get in touch
Corrections, questions and suggestions are welcome. Email [email protected] and we will read it. If you spot a factual error, tell us the page and the claim and we will fix it or explain why it stands.