<!DOCTYPE html>
<html>
<head>
<title>鉄板重量計算機</title>
<meta charset=”utf-8″>
<meta name=”viewport” content=”width=device-width, initial-scale=1.0″>
<style>
body {
font-family: Arial, sans-serif;
font-size: 16px;
line-height: 1.6;
margin: 0;
padding: 0;
}
.container {
max-width: 500px;
margin: 0 auto;
padding: 20px;
}
h1 {
text-align: center;
font-size: 24px;
margin-bottom: 20px;
}
label {
display: block;
margin-bottom: 10px;
}
input[type=”number”] {
width: 100%;
padding: 10px;
font-size: 16px;
margin-bottom: 20px;
border: 1px solid #ccc;
border-radius: 4px;
}
input[type=”submit”] {
background-color: #4CAF50;
color: #fff;
padding: 10px 20px;
border: none;
border-radius: 4px;
cursor: pointer;
}
input[type=”submit”]:hover {
background-color: #3e8e41;
}
.result {
text-align: center;
font-size: 24px;
margin-top: 20px;
}
</style>
</head>
<body>
<div class=”container”>
<h1>鉄板重量計算機</h1>
<form id=”calc-form”>
<label for=”length”>縦(cm)</label>
<input type=”number” id=”length” name=”length” required>
<label for=”width”>横(cm)</label>
<input type=”number” id=”width” name=”width” required>
<label for=”thickness”>厚み(mm)</label>
<input type=”number” id=”thickness” name=”thickness” required>
<input type=”submit” value=”計算する”>
</form>
<div class=”result”>
<span id=”result-text”>0</span> kg
</div>
</div>
<script>
const form = document.getElementById(‘calc-form’);
const lengthInput = document.getElementById(‘length’);
const widthInput = document.getElementById(‘width’);
const thicknessInput = document.getElementById(‘thickness’);
const resultText = document.getElementById(‘result-text’);
form.addEventListener(‘submit’, (e) => {
e.preventDefault();
const length = lengthInput.value / 100; // cmをmに変換
const width = widthInput.value / 100; // cmをmに変換
const thickness = thicknessInput.value / 1000; // mmをmに変換
const density = 7.85; // 鉄の密度(g/cm^3)
const weight = (length * width * thickness * density) * 1000; // 重量(kg)
resultText.textContent = weight.toFixed(2);
});
</script>
</body>
</html>