BMI Calculator
Calculate your Body Mass Index (BMI), see your WHO weight category, and find your healthy weight range for your height.
What Does This Tool Do?
Calculate Body Mass Index (BMI = weight ÷ height²) and see your WHO weight category with colour coding, plus the healthy weight range for your specific height.
Key Features
7 Categories
From Severely Underweight to Obese Class III.
Healthy Range
Target weight range for your height.
Formula Shown
Full BMI calculation displayed.
Instant
Immediate result.
How to Use
- Enter your weight in kilograms.
- Enter your height in centimetres.
- Click Calculate BMI.
Frequently Asked Questions
What is BMI?▾
Body Mass Index = weight (kg) ÷ height² (m²). It is a simple screening tool for weight status. WHO categories: <18.5 underweight, 18.5–24.9 healthy, 25–29.9 overweight, ≥30 obese.
Is BMI accurate for everyone?▾
BMI is a population-level screening tool, not an individual diagnostic. It can misclassify muscular athletes (high BMI, low fat) and older adults (low BMI, high fat). Use with other measures.
What is a healthy BMI?▾
WHO defines 18.5–24.9 as healthy weight range. Values vary slightly by ethnicity — some Asian population guidelines use 18.5–22.9 as the healthy range.
Complete Guide to BMI Calculator
When To Use This Tool
Use BMI Calculator whenever you need fast, accurate output without installing software. This tool is designed for speed, clarity, and repeatable results for day-to-day work.
Best Practices for Accurate Results
- Double-check the format of your input before running the tool.
- Test with a small sample first, then process larger data.
- Use Related Tools to verify, convert, or transform the output.
Why Users Prefer AdeDX
AdeDX tools are browser-based, free to use, and built to work across desktop and mobile devices. Most processing happens directly in your browser for fast performance and improved privacy.