BMI Calculator
Body Mass Index in metric or imperial, with the range explained.
Your BMI
22.9
Healthy weight
A BMI in the healthy range for your height means roughly 56.7–76.3 kg.
Adult BMI categories
- Underweight0 – 18.5
- Healthy weight18.5 – 25
- Overweight25 – 30
- Obese class I30 – 35
- Obese class II35 – 40
- Obese class III40 – ∞
This is general information, not medical advice. BMI is a rough screening number for adults. It cannot tell muscle from fat and is not valid for children, pregnancy or athletes. Talk to a healthcare professional about your own health.
Private by design. This tool runs entirely in your browser. Your input is processed on your own device and is not uploaded by DO101.
About the BMI Calculator
Calculate Body Mass Index from height and weight in either metric or imperial units, and see where the result sits on the standard adult scale. BMI is a rough screening number, not a diagnosis — the page explains what it does and does not tell you.
How to use it
- 1Choose metric or imperial.
- 2Enter your height and weight.
- 3Read your BMI and the category scale beneath it.
What you get
- Metric (cm / kg) and imperial (ft, in / lb)
- Category scale with your position marked
- Healthy weight range for your height
- Plain-English limitations section
- Calculated on your device
Frequently asked questions
Is BMI accurate?
BMI is a population-level screening tool. It does not distinguish muscle from fat, and it can misclassify athletes, older adults, pregnant people and children. Treat it as one rough signal, not a verdict on your health.
What is the formula?
Metric: weight in kilograms divided by height in metres squared. Imperial: 703 × weight in pounds ÷ height in inches squared.
Does DO101 store my measurements?
No. The calculation runs in the page and nothing is transmitted or saved.
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