Body Mass Index Calculator

Calculate your Body Mass Index (BMI) instantly with our free online tool. Supports both metric and imperial units.

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About This Tool

This BMI Calculator helps you determine your Body Mass Index (BMI) by entering your height and weight. BMI is a simple measurement that indicates whether you have a healthy body weight for your height. The tool supports both metric (centimeters and kilograms) and imperial (inches and pounds) units. After calculation, you'll receive your BMI value along with the corresponding WHO category (Underweight, Normal, Overweight, Obese) and health recommendations. All calculations are performed client-side for instant results.

Save your calculation history with a free account

How to Use

Select your preferred unit system (Metric or Imperial)
Enter your height in centimeters or inches
Enter your weight in kilograms or pounds
Click the 'Calculate BMI' button
View your BMI result, category, and health recommendations

Frequently Asked Questions

Find Quick Answers

What is BMI?

BMI (Body Mass Index) is a measure of body fat based on your weight in relation to your height. It's a simple screening tool to identify potential weight problems.

How accurate is BMI?

BMI is a useful population-level screening tool but doesn't account for muscle mass, bone density, or body composition. Athletes with high muscle mass may have a high BMI despite being healthy.

What do the BMI categories mean?

Underweight (BMI < 18.5), Normal weight (18.5-24.9), Overweight (25-29.9), Obese (30 or higher). These are based on WHO standards.

Can I use this tool on mobile?

Yes, the BMI Calculator is fully responsive and works perfectly on all devices including smartphones and tablets.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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