Area of a Rectangle Calculator
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: #f8f9fa;
color: #333;
line-height: 1.6;
margin: 0;
padding: 20px;
}
.calculator-container {
max-width: 800px;
margin: 30px auto;
background-color: #ffffff;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
display: flex;
flex-direction: column;
gap: 20px;
}
h1, h2 {
color: #004a99;
text-align: center;
margin-bottom: 10px;
}
.input-section, .result-section {
border: 1px solid #e0e0e0;
border-radius: 5px;
padding: 20px;
background-color: #fdfdfd;
}
.input-group {
margin-bottom: 15px;
display: flex;
flex-direction: column;
gap: 8px;
}
.input-group label {
font-weight: 600;
color: #004a99;
}
.input-group input[type="number"] {
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1rem;
width: calc(100% – 22px); /* Adjust for padding */
}
.input-group input[type="number"]:focus {
border-color: #004a99;
outline: none;
box-shadow: 0 0 0 2px rgba(0, 74, 153, 0.2);
}
button {
background-color: #004a99;
color: white;
padding: 12px 20px;
border: none;
border-radius: 5px;
font-size: 1.1rem;
cursor: pointer;
transition: background-color 0.3s ease;
width: 100%;
}
button:hover {
background-color: #003366;
}
.result-section {
background-color: #e7f3ff;
text-align: center;
}
#result {
font-size: 2.5rem;
font-weight: bold;
color: #28a745;
margin-top: 10px;
}
.error-message {
color: #dc3545;
font-weight: bold;
text-align: center;
margin-top: 10px;
}
.article-section {
margin-top: 40px;
padding: 20px;
border-top: 2px solid #004a99;
}
.article-section h2 {
color: #004a99;
text-align: left;
margin-bottom: 15px;
}
.article-section p, .article-section ul {
color: #555;
margin-bottom: 15px;
}
.article-section code {
background-color: #eef;
padding: 2px 5px;
border-radius: 3px;
}
/* Responsive Adjustments */
@media (max-width: 768px) {
.calculator-container {
padding: 20px;
}
button {
font-size: 1rem;
padding: 10px 15px;
}
#result {
font-size: 2rem;
}
}
@media (max-width: 480px) {
.calculator-container {
padding: 15px;
margin: 15px auto;
}
h1 {
font-size: 1.8rem;
}
#result {
font-size: 1.8rem;
}
button {
font-size: 1rem;
}
}
Area of a Rectangle Calculator
Understanding the Area of a Rectangle
The area of a rectangle is a fundamental concept in geometry, representing the two-dimensional space enclosed by its boundaries. It's calculated by multiplying the length of the rectangle by its width. This measurement is crucial in various practical applications, from home improvement and construction to design and everyday tasks.
The Formula
The formula for the area of a rectangle is straightforward:
Area = Length × Width
Where:
Area is the total space enclosed within the rectangle, typically measured in square units (e.g., square meters, square feet, square inches).Length is the measurement of the longer side of the rectangle.Width is the measurement of the shorter side of the rectangle.
How the Calculator Works
This calculator simplifies the process of finding the area. You simply need to input the values for the rectangle's length and width into the provided fields. The calculator will then automatically apply the formula (Length × Width) to compute the total area. The result is displayed in square units, corresponding to the units used for length and width (e.g., if you input length in meters and width in meters, the area will be in square meters).
Use Cases
The ability to calculate the area of a rectangle is incredibly useful in many scenarios:
- Home Improvement: Estimating the amount of paint needed for a wall, the number of tiles required for a floor, or the square footage of a room for renovations.
- Gardening: Planning the layout of a garden bed or determining the size of a lawn.
- Construction: Calculating the surface area of materials needed for building projects, such as carpeting, flooring, or concrete slabs.
- Interior Design: Figuring out how much fabric is needed for curtains or upholstery, or arranging furniture within a space.
- Real Estate: Determining the usable living space of a property.
By providing precise measurements, this calculator ensures you get an accurate area calculation, saving time and resources.
function calculateArea() {
var lengthInput = document.getElementById("length");
var widthInput = document.getElementById("width");
var resultDisplay = document.getElementById("result");
var errorMessageDisplay = document.getElementById("error-message");
var unitDisplay = document.getElementById("unit-display");
var length = parseFloat(lengthInput.value);
var width = parseFloat(widthInput.value);
// Clear previous error messages
errorMessageDisplay.textContent = "";
resultDisplay.textContent = "0";
unitDisplay.textContent = "Square Units";
if (isNaN(length) || isNaN(width)) {
errorMessageDisplay.textContent = "Please enter valid numbers for both length and width.";
return;
}
if (length <= 0 || width <= 0) {
errorMessageDisplay.textContent = "Length and width must be positive values.";
return;
}
var area = length * width;
// Display the result
resultDisplay.textContent = area.toFixed(2); // Display with 2 decimal places
// Dynamically update units if input units were specified (optional for this basic version)
// For now, we'll just state "Square Units"
unitDisplay.textContent = "Square Units";
}