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# Design a BMI Calculator using JavaScript Ahtsham Ajus
Beginner. Starting my journey of Web Development.

The Body Mass Index (BMI) Calculator can be used to calculate BMI values based on their height and weight. BMI is a fairly reliable indicator of body fatness for most people.

Formula:

BMI = (weight) / (height * height)

Here's JavaScript code

`````` function BMI(weight, height) {
return(weight / (height * height));
}

let bmiResult = BMI(57, 1.73736);
console.log(bmiResult);
`````` ## Discussion (7) InHuOfficial

173.736m...that is a very tall person! 😜🤣

Especially at 57kg, they need to lose some weight! Andrew Bone

0.0018884053362648637 BMI, I think they need to put some on... InHuOfficial • Edited

I was kidding 😋 At 57kg very few people should need to lose weight!

I was trying to work out how thin they would have to be to be 173m tall and 57kg but I couldn't quite get it right, I think it is about 0.57cm wide! 🤣 Andrew Bone • Edited

Let's do some maths 😁

``````985 kg/m3
weight = height(m) * width(m) * depth(m) * 985
57 = 173 * 0.41 * depth * 985
57 / 985 = 173 * 0.41 * depth
0.0579 (4dp) = 173 * 0.41 * depth
0.0579 = 70.93 * depth
depth = 8.1629775835330607641336528972226e-4m
depth = 0.0816cm (4dp)
``````

This is presuming average human density and a 'normal' shoulder width of 41cm.

😅 