Design a Retirement Age Calculator in Tailwind CSS Last Updated : 23 Jul, 2025 Comments Improve Suggest changes Like Article Like Report The Retirement Age Calculator is a web application designed to help users determine the number of years, months, and days until their desired retirement date. PrerequisitesHTMLTailwind CSSJavaScriptApproachUsers can input their date of birth and desired retirement date.Upon clicking the "Calculate Retirement Age" button, the application calculates the number of years, months, and days until retirement.If any of the input fields are empty or contain invalid dates an error message is displayed prompting the user to fill in the all fields correctly.Example: This example shows the implementation of the above-explained approach. HTML <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>The Retirement Age Calculator</title> <link href= "https://cdn.jsdelivr.net/npm/[email protected]/dist/tailwind.min.css" rel="stylesheet"> </head> <body class="bg-gray-100"> <div class="flex justify-center items-center h-screen"> <div class="max-w-md w-full bg-white p-8 rounded-lg shadow-lg border-2 border-green-500"> <h1 class="text-3xl font-bold text-center mb-8">Retirement Age Calculator</h1> <div class="mb-4"> <label for="dob" class="block text-gray-700"> Date of Birth:</label> <input type="date" id="dob" name="dob" class="w-full border border-gray-300 rounded-md px-3 py-2 focus:outline-none focus:border-blue-500"> </div> <div class="mb-4"> <label for="retirementDate" class="block text-gray-700"> Desired Retirement Date:</label> <input type="date" id="retirementDate" name="retirementDate" class="w-full border border-gray-300 rounded-md px-3 py-2 focus:outline-none focus:border-blue-500"> </div> <div class="mb-8"> <button id="calculateButton" class="w-full bg-blue-500 text-white rounded-md py-2 px-4 hover:bg-blue-600 focus:outline-none"> Calculate Retirement Age </button> </div> <div id="retirementResult" class="text-lg font-semibold text-center"></div> <div id="errorMessage" class="text-red-500 text-sm mt-4 hidden">Please fill in all fields.</div> </div> </div> <script> const calculateButton = document.getElementById('calculateButton'); calculateButton.addEventListener('click', () => { const dob = new Date(document.getElementById('dob').value); const retirementDate = new Date(document .getElementById('retirementDate').value); if (!dob || !retirementDate || isNaN(dob.getTime()) || isNaN(retirementDate.getTime())) { document.getElementById('errorMessage') .classList.remove('hidden'); return; } const yearsToRetirement = retirementDate.getFullYear() - dob.getFullYear(); const monthsToRetirement = retirementDate.getMonth() - dob.getMonth(); const daysToRetirement = retirementDate.getDate() - dob.getDate(); document.getElementById('retirementResult').innerHTML = `You have ${yearsToRetirement} years, ${monthsToRetirement} months, and ${daysToRetirement} days until retirement.`; document.getElementById('errorMessage') .classList.add('hidden'); }); </script> </body> </html> Output: Comment More infoAdvertise with us Next Article Design a Range Calculator in Tailwind CSS S subramanyasmgm Follow Improve Article Tags : CSS Similar Reads Design a Age Calculator in Tailwind CSS This project implements an Age Calculator web application using HTML, CSS (Tailwind CSS), and JavaScript. 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