What is the BMI Calculator?

It is a free online tool that calculates BMI from height and weight and displays an obesity assessment along with ideal weight.

Is it free? Is my data safe?

Completely free. All calculations happen in your browser, and input data is never sent externally.

What is the normal BMI range?

According to WHO standards, 18.5 to 24.9 is considered normal weight. The tool also displays assessment based on Japan Obesity Society standards.

BMI Calculator

A health management calculator that instantly computes your BMI from height and weight, displaying an obesity assessment based on WHO and Japan Obesity Society standards along with a visual gauge. It also calculates your ideal and healthy weight ranges so you can set informed health goals. Useful for individuals tracking their fitness progress, healthcare professionals performing quick assessments, and anyone interested in understanding their body composition.

Enter Body Data

Height (cm)

Weight (kg)

Enter height and weight to calculate BMI

Practical Guide

Calculators for age, dates, loans, BMI, percentages, world time, and everyday business/life math. Useful for quick estimates and checking formulas.

When this tool is useful

BMI Calculator helps with common Life & Calculator tasks that require quick checking, conversion, or creation. It supports workflows such as Instant BMI calculation from height and weight, Assessment based on WHO and Japan Obesity Society standards without forcing users to switch pages or apps.

Processing and privacy

Your input is processed in the browser and is not designed to be sent to a server just to use the tool. This makes it suitable for temporary checks, draft work, and pre-publication cleanup.

Workflow tip

After checking the result, use the related tools and same-category links near the bottom of the page to continue the surrounding task. Frequently used tools also appear in the Recently Used section.