BMI Calculator
Enter weight and height to get the BMI value
BMI Reference Ranges
| Range | BMI | Category |
|---|---|---|
| < 18.5 | Below 18.5 | Under |
| 18.5 – 24.9 | 18.5 to 24.9 | Common |
| 25.0 – 29.9 | 25.0 to 29.9 | Above |
| ≥ 30.0 | 30.0 or above | High |
How to Use
BMI (Body Mass Index) is a number derived from weight divided by the square of height, commonly used in epidemiological statistics to describe body type. The formula is BMI = weight(kg) / height(m)². Enter weight (kg) and height (cm) to get the BMI value (one decimal place), along with common reference ranges.
This tool only shows the BMI value alongside common reference ranges. It is not a medical diagnosis, treatment advice, or health assessment. Consult a qualified medical professional for personal health concerns. Processing runs locally in your browser; no data is uploaded.
FAQ
Does BMI reflect overall health?
No. BMI is only a ratio of weight to height; it does not distinguish muscle from fat, nor reflect fat distribution, metabolic state or other physiological indicators. This tool only displays the value and common reference ranges, not a health assessment or medical diagnosis.
Why do reference ranges vary across sources?
Common reference ranges are published by organizations such as the WHO; different countries or professional bodies may adjust them based on local population data. This tool shows commonly used generic ranges for reference only.
Is my data uploaded?
No. All calculation happens locally in your browser. Your weight and height never leave your device and no sign-up is required.