BMI Calculator – Check Your Body Mass Index

Welcome to our free Body Mass Index (BMI) Calculator, your quick and easy tool to assess your current health status based on your weight and height. Understanding your Body Mass Index (BMI) is a crucial first step in determining if you fall into the underweight, normal weight, overweight, or obese categories and helps you set personalized health and fitness goals. Simply enter your metrics into the calculator below to get an instant result and gain valuable insights into your overall well-being today.

Tell Us About Yourself

Units

U.S. ImperialMetric

Choose the unit system you prefer. We'll only use the matching height and weight fields.

Basic InformationSexAge (years)

Adult BMI categories are intended for ages 18+. For children and teens, a pediatrician can interpret BMI percentiles.

About This BMI Calculator

We use the standard adult BMI formula recommended by major health organizations. Your result is a rough screening tool—not a diagnosis. Use it alongside other information like waist circumference, blood work, and how you feel day to day.

Height & Weight

Height (ft)Height (in)Weight (lb)

Height (cm)Weight (kg)

Fill in whichever unit system matches your selection above. We'll convert behind the scenes to calculate your BMI.

This tool follows adult BMI cut points from major public-health organizations. Results are for educational purposes only and should not replace medical advice.

Your Body Mass Index (BMI) is a simple ratio of your weight and height. It's not a perfect measure of health, but it's a useful starting point for understanding whether your weight is in a range that public health guidelines consider underweight, normal, overweight, or obese. Enter your details to see your BMI, category, and a healthy weight range for your height.