Free BMI Calculator: Check Your Body Mass Index
An easy-to-use online tool to quickly calculate your Body Mass Index (BMI) and determine if you are in a healthy weight range based on your height and weight.
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An easy-to-use online tool to quickly calculate your Body Mass Index (BMI) and determine if you are in a healthy weight range based on your height and weight.
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BMI relates your weight to your height to offer a quick, population-based view of weight status. It is useful as a first pass, not a diagnosis.
Your results here also include healthy weight range by height, BMI Prime (relative to 25), optional Asian adult risk notes, and screening add-ons like waist-to-height ratio (WHtR) and an adult body-fat estimate.
Select either metric (kg, cm) or imperial (lbs, inches).
Input current weight and height in the selected units.
Adding age/waist enables WHtR, body-fat estimate, and waist-risk notes.
Click the Calculate button to see BMI and adjunct screening outputs.
Interpret with the medical disclaimer; consult professionals for personal advice.
May indicate insufficient body weight. Discuss nutrition and causes with a clinician.
Generally healthy for most adults. Maintain balanced nutrition and regular activity.
Associated with increased health risks. Consider sustainable changes in diet and activity.
Substantially elevated risks. Seek comprehensive, professional guidance.
Calculate your Body Mass Index (BMI) in seconds. You'll also see a healthy weight range for your height, BMI Prime, waist-to-height ratio (WHtR), Asian adult notes, and a simple body-fat estimate. Everything is presented on a single page so you can review results without switching tools. This adult BMI chart helps you interpret weight status with clear, practical context.
BMI, BMI Prime, WHtR, healthy weight range, waist risk, body fat estimate.
WHO categories with additional notes for Asian BMI thresholds (≥23 / ≥27.5).
All calculations run locally in your browser. No signup, no data stored.
Looking to go deeper? Try our Calorie Calculator to estimate daily energy needs, or our BMI Calculator for Pregnant Women for pre‑pregnancy BMI and recommended weight gain ranges. You can also use the Age Calculator for date math, or the Scientific Calculator for quick computations.
This calculator is based on research and guidelines from reputable sources in the field.
Official BMI classification standards and health guidelines
BMI calculation methods and interpretation guidelines for adults
Clinical BMI calculator and cardiovascular health implications
BMI guidelines for cardiovascular health and weight management
Scientific approach to healthy weight planning and BMI assessment
Research on BMI limitations and alternative health metrics
Clinical studies on BMI accuracy and health outcomes
Important: This BMI calculator provides screening information for educational purposes only and does not constitute medical diagnosis, treatment, or professional healthcare advice. Results are based on standard WHO classifications and may not be appropriate for all individuals, including pregnant women, children under 20, athletes with high muscle mass, elderly individuals, or certain ethnic populations. BMI calculations do not account for muscle mass, bone density, body composition, or individual health factors. No personal data is collected, stored, or transmitted by this tool. For comprehensive health assessment, weight management guidance, or medical concerns, always consult qualified healthcare professionals who can provide personalized advice based on your complete medical history and individual circumstances.
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