How to create Fahrenheit to Celsius converter

Web Coding
Sep 6, 2020
1 min read

Today I will be teaching you how to create a Fahrenheit to Celsius converter with HTML, CSS and JavaScript

HTML and CSS

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>Document</title>
 <style>
 body{
 min-height: 100vh;
 display: flex;
 align-items: center;
 justify-content: center;
        }
 </style>
</head>
<body>
 <div>
 <h1>Convert Fahrenheit to Celsius and vice versa</h1>
    Convert to: <select name="conversionSelect" id="conversionSelect">
 <option value="celsius">Celsius</option>
 <option value="fahrenheit">Fahrenheit</option>
 </select> <br>
    Value: <input type="text" id="value"> <br>
 <button type="button" id="calcBtn">Calculate</button>
 
 <div>Result: <span id="resultDisplay"></span></div>
 </div>

 
 <script src="script.js"></script>
</body>
</html>

JavaScript

let valueToBeConverted = document.getElementById('value');
let conversionSelect = document.getElementById('conversionSelect');
let convertBtn = document.getElementById('calcBtn');
let outputDisplay = document.getElementById('resultDisplay');

convertBtn.addEventListener('click', calculate);

function calculate(){
 let result = 0;
 if(conversionSelect.value === 'fahrenheit'){
 result = (parseFloat(valueToBeConverted.value) * 9/5) + 32;
 outputDisplay.innerHTML = result.toFixed(2);
    } else {
 result = (parseFloat(valueToBeConverted.value) - 32) * 5/9;
 outputDisplay.innerHTML = result.toFixed(2);
    }
}

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