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BMI Calculator

Health Calculator

BMI Calculator

Calculate your Body Mass Index instantly. Check if you're at a healthy weight and understand your health category with our accurate BMI chart.

100% Private Instant Results Metric/Imperial Visual Chart

Calculate Your BMI

Weight (kg)

Height (cm)

No data stored. All calculations run locally in your browser.

How to Use

Select Unit System

Choose Metric or Imperial

Enter Weight

Input your weight in kg or lbs

Enter Height

Input your height in cm or inches

Get Results

See your BMI and health category

Features

Instant Results

Get your BMI in milliseconds

100% Private

All processing in your browser

Dual Units

Metric and Imperial supported

Visual Chart

Easy-to-understand categories

BMI Categories

Underweight (<18.5)

May indicate malnutrition

Normal (18.5-24.9)

Healthy weight range ✓

Overweight (25-29.9)

Increased health risks

Obese (30+)

High health risks

Why Use Our BMI Calculator?

Instant Results

Get your BMI calculation in milliseconds

100% Private

No data storage, all local processing

Dual Units

Works with Metric and Imperial

Works Anywhere

Mobile, tablet and desktop friendly

Frequently Asked Questions

What is BMI?

Body Mass Index (BMI) is a measure of body fat based on height and weight that applies to adult men and women.

How is BMI calculated?

BMI = weight (kg) / height (m)². For imperial: (weight in lbs / height in inches²) × 703.

What is a normal BMI?

A normal BMI range is 18.5 to 24.9. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.

Is BMI accurate for everyone?

BMI is a general screening tool but doesn't account for muscle mass, age, gender, or body composition.

Is my data private?

Yes! All calculations happen in your browser. We never store or transmit any personal information.

Can I use BMI for children?

For children and teens, BMI is interpreted using age and gender percentiles. Consult a pediatrician.

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