Work out locally your body mass index from weight and height - with a healthy-weight range and category, no upload.
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
The body mass index relates weight to height and gives a simple orientation as to whether the weight is in the usual range. From your weight and height this calculator shows the BMI value, the range that counts as a healthy weight at your height, and a scale with the four common categories from underweight to obese. So you see at a glance where your value sits.
The calculation runs entirely locally in your browser, in pure JavaScript - nothing is uploaded and nothing is stored. The BMI is the weight in kilograms divided by the height in metres squared. The healthy-weight range comes from a BMI of 18.5 to 25 for your height. The categories follow the common thresholds: under 18.5 underweight, 18.5 to 25 healthy, 25 to 30 overweight, 30 and above obese. Change an input and everything updates instantly.
An honest note: the BMI is only a rough figure. It does not distinguish muscle from fat and does not fit everyone equally well - for example very athletic people, children, pregnant women or older people. It is a first reference point and does not replace medical advice. For your daily energy needs use the calorie calculator.
| Input formats | Form inputs (no file) |
|---|---|
| Processing | Locally in your browser (JavaScript) |
| File upload | None |
Limitations: A rough figure: the BMI does not distinguish muscle from fat and does not fit everyone equally well (athletes, children, pregnant women, older people). A first reference point that does not replace medical advice. For energy needs use the calorie calculator.
No. The calculation runs entirely locally in the browser (pure JavaScript); nothing is sent or stored.
Weight in kilograms divided by height in metres squared. Example: 70 kg at 1.75 m gives a BMI of about 22.9.
A BMI of 18.5 to 25 is commonly seen as a healthy weight, below that underweight, 25 to 30 overweight and 30 and above obese.
Only to a limited extent. It does not distinguish muscle from fat and does not fit very athletic people, children, pregnant women or older people well. It does not replace medical advice.