BMI Calculator
Calculate Body Mass Index from height and weight in metric or imperial units, with the standard BMI category. Includes a neutral, informational disclaimer.
22.9
Normal
Disclaimer: BMI is a general screening figure and does not account for muscle mass, body composition, age, sex or ethnicity. It is provided for information only and is not medical advice. Consult a qualified healthcare professional for guidance about your health.
About this tool
Body Mass Index (BMI) is a simple ratio of weight to height that is widely used as a rough screening figure. Enter your height and weight in metric or imperial units to see your BMI and the standard category it falls into.
BMI is a general indicator and does not account for muscle mass, body composition, age or other factors. It is provided for information only and is not medical advice; consult a qualified healthcare professional for any health decisions.
Examples
- 70 kg, 175 cm → BMI 22.9 (Normal)
- 154 lb, 69 in → BMI 22.7 (Normal)
- Categories: Underweight, Normal, Overweight, Obese
Frequently asked questions
How is BMI calculated?
In metric units, BMI = weight (kg) ÷ height (m)². In imperial units, BMI = 703 × weight (lb) ÷ height (in)².
What do the BMI categories mean?
The common adult ranges are: under 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, and 30 or above obese. These are general guides, not diagnoses.
Is BMI accurate for everyone?
No. BMI does not distinguish muscle from fat and may be misleading for athletes, older adults, pregnant people and others. Treat it as a rough screening number only.
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