Calculate your Body Mass Index with metric or imperial units.
BMI Calculator is a free, browser-based tool designed for students, professionals, and anyone who needs quick calculations. Calculate your BMI. Enter height and weight. Metric and imperial. Visual scale. Free online BMI calculator. Everything runs locally in your browser using JavaScript — no data is ever sent to a server, making it completely private and secure. The tool is designed to be intuitive and beginner-friendly while still offering advanced features for power users. It loads instantly with no installation required and works offline once loaded. Use it as often as you need — there are no daily limits, no watermarks, and no hidden fees.
Who is this for? BMI Calculator is ideal for professionals, students, freelancers, and hobbyists who want quick, reliable results without installing software or creating accounts. Whether you are on a laptop, tablet, or phone, it works seamlessly in any modern browser.
Yes! BMI Calculator is completely free with no signup required. It runs entirely in your browser — your data never leaves your device.
Simply enter your values in the input fields above and the results update instantly. No button clicks needed — everything calculates in real-time.
Absolutely. BMI Calculator runs 100% client-side in your browser using JavaScript. No data is uploaded, stored, or shared with any server. Your privacy is guaranteed.