Body mass index (BMI) is a simple screening measure that compares your weight with your height. Type your numbers into the calculator below for an instant estimate, then read on to understand what the result does — and does not — tell you.
BMI Calculator
Height:
What BMI does and does not show
BMI is a quick screening tool, not a diagnosis. It does give a rough sense of whether your weight sits in a typical range for your height. It does not measure body fat directly, tell muscle apart from fat, or capture your overall fitness, diet, or health on its own.
Educational estimates only — this tool is not medical advice. BMI is less accurate for athletes, pregnant people, and children. If you have a health condition, speak to a qualified healthcare professional first. See our Disclaimer.