Body mass index (BMI) estimates whether your weight falls within a typical range for your height. It is a screening number, not a diagnosis. Use the calculator below, then read the linked guides if you want context on categories, limits, and alternatives.
For adults 20 and older. BMI does not measure body fat directly and may misclassify muscular or older adults. This tool is for general information only—not medical advice. Consult a qualified professional for personal guidance.
Learn more about BMI
- BMI Category Guide — what each range means
- Healthy BMI Ranges Explained — standard cutoffs and context
- How Accurate Is BMI? — strengths and limitations
- BMI vs Body Fat Percentage — when each measure helps
- Body Fat Percentage vs BMI — choosing the right metric
More calculators
Working on fat loss or daily movement? See How to Create a Calorie Deficit, Calorie Calculator, Walking for Weight Loss, and all tools.