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Age Calculator Using HTML,CSS and JavaScript

Age Calculator Using HTML,CSS and JavaScript

Hello everyone. Welcome to today’s tutorial on Codewithrandom. We’ll learn how to make an Age Calculator project which gives us the exact age of the user according to the date of birth of the user. In Today’s session, We will use mostly  HTML and JavaScript Code. With the help of CSS complete this Project.

The HTML (Hypertext Markup Language) will help us to create the structure for the list with some necessary attributes and elements to make Age Calculator. Then we will use CSS (Cascading Stylesheet) which will help us to style or design the project with suitable padding and alignment in the Age Calculator project.

At last, we will use JS (JavaScript) which will add logic to make the Age Calculator project responsive from the user end.

I hope you have got an idea about the project.

HTML Code for Calculator

<html lang="en">
<head>
    <title>Age Calculator</title>
    <!--Google Font-->
    <link rel="preconnect" href="https://fonts.gstatic.com">
    <link href="https://fonts.googleapis.com/css2?family=Poppins:wght@400;500&display=swap" rel="stylesheet">
    <!--Stylesheet-->
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div class="container">
        <div class="inputs-wrapper">
            <input type="date" id="date-input">
            <button onclick="ageCalculate()">Calculate</button>
        </div>
        <div class="outputs-wrapper">
            <div>
                <span id="years">
                    -
                </span>
                <p>
                    Years
                </p>
            </div>
            <div>
                <span id="months">
                    -
                </span>
                <p>
                   Months
                </p>
            </div>
            <div>
                <span id="days">
                    -
                </span>
                <p>
                    Days
                </p>
            </div>
        </div>
    </div>
    <script src="script.js"></script>
</body>
</html>

First, we’ll start with creating the structure of the Age Calculator project for that as you can see in the above code we have used all the necessary elements & attributes. Let us know code the CSS part to add styling and aligned the tags.

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CSS Code for Calculator

*,
*:before,
*:after{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body{
    background-color: orange;
}
.container{
    width: 40%;
    min-width: 450px;
    position: absolute;
    transform: translate(-50%,-50%);
    left: 50%;
    top: 50%;
    padding: 50px 30px;
}
.container *{
    font-family: "Poppins",sans-serif;
    border: none;
    outline: none;
}
.inputs-wrapper{
    background-color: #080808;
    padding: 30px 25px;
    border-radius: 8px;
    box-shadow: 0 15px 20px rgba(0,0,0,0.3);
    margin-bottom: 50px;
}
input,
button{
    height: 50px;
    background-color: #ffffff;
    color: #080808;
    font-weight: 500;
    border-radius: 5px;
}
input{
    width: 60%;
    padding: 0 20px;
    font-size: 14px;
}
button{
    width: 30%;
    float: right;
}
.outputs-wrapper{
    width: 100%;
    display: flex;
    justify-content: space-between;
}
.outputs-wrapper div{
    height: 100px;
    width: 100px;
    background-color: #080808;
    border-radius: 5px;
    color: #ffffff;
    display: grid;
    place-items: center;
    padding: 20px 0;
    box-shadow: 0 15px 20px rgba(0,0,0,0.3);
}
span{
    font-size: 30px;
    font-weight: 500;
}
p{
    font-size: 14px;
    color: #707070;
    font-weight: 400;
}

Second, comes the CSS code which we have styled for the structure we have padded as well as aligned the Age Calculator project so that it is properly situated and doesn’t get messy with suitable CSS elements. Let’s code the JavaScript part to make it responsive.

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JavaScript Code for Calculator

const months = [31,28,31,30,31,30,31,31,30,31,30,31];

function ageCalculate(){
    let today = new Date();
    let inputDate = new Date(document.getElementById("date-input").value);
    let birthMonth,birthDate,birthYear;
    let birthDetails = {
        date:inputDate.getDate(),
        month:inputDate.getMonth()+1,
        year:inputDate.getFullYear()
    }
    let currentYear = today.getFullYear();
    let currentMonth = today.getMonth()+1;
    let currentDate = today.getDate();

    leapChecker(currentYear);

    if(
        birthDetails.year > currentYear ||
        ( birthDetails.month > currentMonth && birthDetails.year == currentYear) || 
        (birthDetails.date > currentDate && birthDetails.month == currentMonth && birthDetails.year == currentYear)
    ){
        alert("Not Born Yet");
        displayResult("-","-","-");
        return;
    }

    birthYear = currentYear - birthDetails.year;

    if(currentMonth >= birthDetails.month){
        birthMonth = currentMonth - birthDetails.month;
    }
    else{
        birthYear--;
        birthMonth = 12 + currentMonth - birthDetails.month;
    }

    if(currentDate >= birthDetails.date){
        birthDate = currentDate - birthDetails.date;
    }
    else{
        birthMonth--;
        let days = months[currentMonth - 2];
        birthDate = days + currentDate - birthDetails.date;
        if(birthMonth < 0){
            birthMonth = 11;
            birthYear--;
        }
    }
    displayResult(birthDate,birthMonth,birthYear);
}

function displayResult(bDate,bMonth,bYear){
    document.getElementById("years").textContent = bYear;
    document.getElementById("months").textContent = bMonth;
    document.getElementById("days").textContent = bDate;
}

function leapChecker(year){
    if(year % 4 == 0 || (year % 100 == 0 && year % 400 == 0)){
        months[1] = 29;
    }
    else{
        months[1] = 28;
    }
}

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Last stage of the project the JavaScript in which we added the logic and coded as per the requirement with some conditions with respect to the month in a calendar so that it leap year appears it doesn’t give an error. Let us see the Final Output of the project Age Calculator Simple HTML,CSS and JavaScript Code.

Final Output Age Calculator


We have successfully created our Creating Age Calculator Simple HTML,CSS and JavaScript Code. You can use this project for your personal needs and the respective lines of code are given with the code pen link mentioned above.

If you find out this Blog helpful, then make sure to search code random on google for Front End Projects with Source codes and make sure to Follow the Code with Random Instagram page.

Thank You And Happy Learning!!!

Code Idea – codingartist

Written By – Harsh Sawant

Code By – @harshh9

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