Body Mass Index Calculator

Calculate your Body Mass Index (BMI) instantly with our free online tool. Get BMI value, category, and health insights.

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About This Tool

This BMI calculator helps you determine your Body Mass Index by entering your height and weight. It supports both metric (cm/kg) and imperial (inches/lbs) units. The tool calculates your BMI using the standard formula and provides a detailed result including your BMI value, weight category (underweight, normal, overweight, obese), health risk assessment, and personalized 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 with category and health insights

Frequently Asked Questions

Find Quick Answers

What is BMI?

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

How accurate is the BMI calculator?

This calculator uses the standard BMI formula (weight/height²) and provides accurate results based on your inputs. However, BMI is a screening tool and doesn't account for muscle mass, bone density, or body composition.

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 categories are based on WHO standards.

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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