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BMI-calculator.html
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<!-- Created by Rishabh Kemni -->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>BMI Calculator</title>
<link href="https://fonts.googleapis.com/css?family=Montserrat&display=swap" rel="stylesheet">
<style>
body{
background: rgb(131, 58, 180);
background: linear-gradient(90deg, rgba(131, 58, 180, 1) 8%, rgba(253, 29, 29, 1) 85%, rgba(252, 176, 69, 1) 100%);
}
h1, h2, h3, h4, p, span, input, select, label{
font-family: 'Montserrat', sans-serif;
}
.bmi-calculator {
border-radius: 5px;
padding: 20px;
background: rgb(201, 166, 224);
background: linear-gradient(90deg, rgba(201, 166, 224, 1) 8%, rgba(252, 176, 69, 1) 100%);
max-width: 250px;
margin: auto;
box-shadow: 10px 10px 25px -10px #000;
}
.unit {
margin-bottom: 0;
line-height: initial;
}
.unitInput {
left: 50px;
margin: 10px 2px;
}
</style>
</head>
<body>
<div class="bmi-calculator">
<h3>1. Enter your Height:</h3>
<div class="callout">
<div class="field sel unit">
<label for="height-unit">Units:</label>
<select name="height-unit">
<option selected="selected" value="ft">Feet / Inches</option>
<option value="cm">Centimeters</option>
</select>
</div>
<div class="input-group unitInput">
<input class="calc form-control" type="text" maxlength="1" size="5" name="feet" />
<span class="input-group-addon" style="width:0;"><label class="unit" for="feet">ft</label></span>
</div>
<div class="input-group unitInput">
<input class="calc form-control" type="text" maxlength="2" size="5" name="inches" />
<span class="input-group-addon" style="width:0;"><label class="unit" for="feet">in</label></span>
</div>
<div class="input-group unitInput" style="display: none;">
<input class="calc form-control" type="text" maxlength="3" size="5" name="centimeters" />
<span class="input-group-addon" style="width:0;"><label class="unit" for="centimeters">cm</label></span>
</div>
</div>
<h3>2. Enter Your Weight:</h3>
<div class="callout">
<div class="field sel unit">
<label for="height-unit">Units:</label>
<select name="weight-unit">
<option selected="selected" value="lbs">Pounds</option>
<option value="kg">Kilograms</option>
</select>
</div>
<div class="input-group unitInput">
<input class="calc form-control" type="text" maxlength="3" size="5" name="pounds" />
<span class="input-group-addon" style="width:0;"><label class="unit" for="pounds">lbs</label></span>
</div>
<div class="input-group unitInput" style="display: none;">
<input class="calc form-control" type="text" maxlength="3" size="5" name="kilograms" />
<span class="input-group-addon" style="width:0;"><label class="unit" for="kilograms">kg</label></span>
</div>
</div>
</div>
<script src="https://code.jquery.com/jquery-3.4.1.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
<script>
var elInputs = $(".calc");
var elHeightUnits = $("select[name=height-unit]");
var elFt = $("input[name=feet]");
var elIn = $("input[name=inches]");
var elCm = $("input[name=centimeters]");
var elWeightUnits = $("select[name=weight-unit]");
var elLbs = $("input[name=pounds]");
var elKg = $("input[name=kilograms]");
configureHeightField();
configureWeightField();
elHeightUnits.change(function () {
configureHeightField();
});
elWeightUnits.change(function () {
configureWeightField();
});
function configureHeightField() {
var strUnit = elHeightUnits.val();
if (strUnit == "ft") {
elFt.parent().show();
elIn.parent().show();
elCm.parent().hide();
} else {
elFt.parent().hide();
elIn.parent().hide();
elCm.parent().show();
}
}
function configureWeightField() {
var strUnit = elWeightUnits.val();
if (strUnit == "lbs") {
elLbs.parent().show();
elKg.parent().hide();
} else {
elLbs.parent().hide();
elKg.parent().show();
}
}
elInputs.keyup(function (e) {
e.preventDefault();
var intHeightInInches =
elHeightUnits.val() == "ft"
? parseInt(elFt.val()) * 12 +
parseInt(elIn.val() != "" ? elIn.val() : 0)
: elCm.val() / 2.54;
var intWeightInPounds =
elWeightUnits.val() == "lbs" ? elLbs.val() : elKg.val() * 2.2;
var intBMI =
Math.round(
((intWeightInPounds * 703) /
(intHeightInInches * intHeightInInches)) *
100
) / 100;
var strWeightClass =
intBMI <= 18.5
? "Underweight"
: intBMI > 18.5 && intBMI <= 25
? "Normal Weight"
: intBMI > 25 && intBMI <= 30
? "Overweight"
: isNaN(intBMI)
? " "
: "Obese";
var intIdealWeightLow = Math.round(
(18.5 * intHeightInInches * intHeightInInches) / 703
);
var intIdealWeightHigh = Math.round(
(25 * intHeightInInches * intHeightInInches) / 703
);
if (strWeightClass && intBMI) {
$(".results").empty();
$(".bmi-calculator").append(
'<div class="callout results">' +
"<h3>Your Results</h3>" +
"<h4>Your BMI is <em>" +
intBMI +
" (" +
strWeightClass +
")</em><br />" +
"Your optimal weight is between<br /><em>" +
intIdealWeightLow +
"</em> and <em>" +
intIdealWeightHigh +
"</em> " +
elWeightUnits.val() +
".</h4>" +
"</div>"
);
$("#userbmi").val(intBMI);
$("#userbmi").attr("value", intBMI);
} else {
$(".results").empty();
}
});
</script>
</body>
</html>