BMI Calculator

Calculate your Body Mass Index (BMI) to check if you're at a healthy weight.

Calculate Your BMI

Your Results

BMI—

How BMI is calculated

BMI is your weight in kilograms divided by your height in meters squared.

Metric formula: BMI = weight (kg) / [height (m)]²
Imperial formula: BMI = [weight (lbs) / height (in)²] × 703

BMI categories: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), Obese (≥30).

FAQs

What is BMI?

BMI is a simple number that shows if your weight is healthy for your height.

Is BMI accurate?

BMI is a good screening tool but doesn't measure body fat directly. Athletes may have high BMI due to muscle.

What is a healthy BMI?

A BMI between 18.5 and 24.9 is considered healthy for most adults.

Can children use this calculator?

No, this is for adults only. Children need special BMI charts based on age and gender.

What if my BMI is high?

Talk to a doctor. They can help you understand your health and make a plan if needed.