Tire OD Calculator

by Trae

HTML

Section Width:
<input type="number" id="sectionWidth" /> <br/>Aspect Ratio:
<input type="number" id="aspectRatio" /><br/>Wheel Diameter:
<input type="text" id="wheelDiameter" /><br/>
<button id="calculate">Calculate Tire OD</button>

JavaScript

var calcButton = document.getElementById("calculate"),
    sectionWidth = document.getElementById("sectionWidth"),
    aspectRatio = document.getElementById("aspectRatio"),
    wheelDiameter = document.getElementById("wheelDiameter");



calcButton.addEventListener("click", function () {
    var mmInInch = 25.4,
        width = parseInt(sectionWidth.value, 10) / mmInInch,
        wallHeight = width * +("." + parseInt(aspectRatio.value, 10)),
        diameter = parseInt(wheelDiameter.value, 10);
    
    alert((wallHeight * 2 + diameter).toPrecision(2));
});


//var div = Math.floor(y/x);
//var rem = y % x;