BMI Calculator

Calculate your Body Mass Index (BMI) and assess your weight status.

BMI Settings
Your BMI Result
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How to Use the BMI Calculator

Calculate your Body Mass Index in seconds — a reliable indicator of healthy weight ranges. All computations happen locally in your browser.

1

Enter Your Weight

Type your weight in kilograms or pounds. The calculator supports both metric and imperial units, with instant conversion between systems.

2

Input Your Height

Provide your height in centimeters, meters, feet, or inches. The tool adapts automatically to your preferred unit system for a seamless experience.

3

Get Instant BMI Result

Your BMI value appears immediately, along with a clear category label: Underweight, Normal, Overweight, or Obese. The color-coded result makes it easy to interpret at a glance.

4

Understand Your Health Range

Review the detailed BMI chart and health recommendations. The tool provides contextual information about what your score means for your overall wellness.

🔒 Complete Privacy Protection

Your weight and height data never leave your device. All calculations are performed client-side using JavaScript — zero data storage, zero server communication, zero tracking. Your health metrics stay private.

Smart BMI Analysis Features

Dual Unit System

Seamlessly switch between metric (kg/cm) and imperial (lb/ft/in) units. The calculator handles conversions automatically for accurate results.

Visual BMI Scale

Interactive color-coded gauge shows exactly where your BMI falls on the spectrum from underweight to obese, making interpretation intuitive.

Health Category Insights

Beyond just the number, get detailed explanations of what each BMI category means, along with general health recommendations for your range.

Save & Share Results

Print your BMI results or copy them to clipboard. Track your progress over time by saving or sharing your readings with healthcare providers.

Smart Health Tracking

The tool provides context-aware feedback, including ideal weight range for your height, potential health risks, and tips for maintaining a healthy BMI.

Frequently Asked Questions

1 Is BMI an accurate measure of health?
BMI is a useful screening tool, but it doesn't directly measure body fat or account for muscle mass, bone density, or distribution. Athletes or older adults may have different health profiles. Always consult a healthcare professional for personalized advice.
2 What BMI range is considered healthy?
According to the World Health Organization (WHO), a BMI between 18.5 and 24.9 is considered normal/healthy. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese. These ranges may vary slightly for different ethnicities or age groups.
3 Can I calculate BMI for children?
Yes, but interpretation differs for children and teens. Pediatric BMI is age- and sex-specific, using percentile charts rather than fixed cutoffs. This tool provides general BMI, but for children, consult a pediatrician for proper growth assessment.
4 Does BMI differ between men and women?
The BMI formula is the same for all adults, but men typically have higher muscle mass, which can skew results. Women generally have more body fat. The same BMI range applies, but interpretation may consider these physiological differences.
5 Is my data stored or shared with third parties?
Absolutely not. All calculations happen in your browser's JavaScript engine. No data is sent to any server, saved in cookies, or tracked. Your weight, height, and BMI results are completely private and vanish when you close the page.