BMI Calculator — Body Mass Index & Healthy Range
Calculate your Body Mass Index and healthy weight range
How to Use BMI Calculator
Calculate your Body Mass Index and healthy weight range No signup, and nothing gets uploaded for most use.
- 1
Enter your weight in kilograms (or switch to pounds).
- 2
Enter your height in centimeters (or switch to feet/inches).
- 3
Your BMI, health category and ideal weight range appear instantly.
- 4
Check the BMI scale chart to understand where your result falls.
Why you might like it
- Nothing to upload — the work happens on your device.
- Free with no signup, no watermarks, and no daily limits.
- Works in any modern browser on any device — nothing to install.
- Usually done in a few seconds, so it doesn't get in your way.
Frequently Asked Questions
What is a healthy BMI?▾
A BMI between 18.5 and 24.9 is considered a healthy weight for most adults. Below 18.5 is underweight and 25 or above is overweight or obese.
Is BMI accurate for athletes?▾
BMI does not distinguish between muscle and fat, so muscular athletes can show a high BMI while having a low body fat percentage.
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Learn more
BMI: The Complete Guide for 2026
Learn how BMI works, what the numbers mean, and how to use the calculator to track your weight status. Covers the formula, categories, and healthy ranges.
How to Use BMI: A Step-by-Step Guide
Step-by-step guide to using the BMI Calculator — enter your height and weight, choose units, and get your BMI result instantly.
BMI: Formats, File Types, and Size Limits
An overview of the BMI Calculator's inputs and options — units, number formats, and how to read your results.