.calculator-container {
background-color: #f9f9f9;
border: 1px solid #ddd;
padding: 20px;
border-radius: 8px;
max-width: 500px;
margin: 20px auto;
font-family: Arial, sans-serif;
}
.calculator-container h2 {
text-align: center;
color: #333;
margin-bottom: 20px;
}
.calc-input-group {
margin-bottom: 15px;
display: flex;
flex-direction: column;
}
.calc-input-group label {
margin-bottom: 5px;
color: #555;
font-weight: bold;
}
.calc-input-group input[type="number"] {
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 16px;
width: 100%;
box-sizing: border-box; /* Ensures padding doesn't increase width */
}
.calc-radio-group {
margin-bottom: 20px;
display: flex;
flex-wrap: wrap;
gap: 15px;
}
.calc-radio-group input[type="radio"] {
margin-right: 5px;
}
.calc-radio-group label {
color: #555;
}
.calc-button {
background-color: #007bff;
color: white;
padding: 12px 20px;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 18px;
width: 100%;
box-sizing: border-box;
transition: background-color 0.3s ease;
}
.calc-button:hover {
background-color: #0056b3;
}
.calc-result {
margin-top: 20px;
padding: 15px;
border: 1px solid #e0e0e0;
border-radius: 4px;
background-color: #e9ecef;
font-size: 18px;
font-weight: bold;
color: #333;
text-align: center;
}
function calculateFeetInches() {
var feet1 = parseFloat(document.getElementById("feet1").value);
var inches1 = parseFloat(document.getElementById("inches1").value);
var feet2 = parseFloat(document.getElementById("feet2").value);
var inches2 = parseFloat(document.getElementById("inches2").value);
var scalar = parseFloat(document.getElementById("scalar").value);
var operation = document.querySelector('input[name="operation"]:checked').value;
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = ""; // Clear previous results
// Input validation
if (isNaN(feet1) || isNaN(inches1)) {
resultDiv.innerHTML = "Please enter valid numbers for Measurement 1.";
return;
}
if (feet1 < 0) {
resultDiv.innerHTML = "Feet for Measurement 1 cannot be negative.";
return;
}
var totalInches1 = (feet1 * 12) + inches1;
var resultInches;
var errorMessage = "";
switch (operation) {
case "add":
case "subtract":
if (isNaN(feet2) || isNaN(inches2)) {
errorMessage = "Please enter valid numbers for Measurement 2 for Add/Subtract operations.";
} else if (feet2 < 0) {
errorMessage = "Feet for Measurement 2 cannot be negative.";
} else {
var totalInches2 = (feet2 * 12) + inches2;
if (operation === "add") {
resultInches = totalInches1 + totalInches2;
} else { // subtract
resultInches = totalInches1 – totalInches2;
}
}
break;
case "multiply":
case "divide":
if (isNaN(scalar)) {
errorMessage = "Please enter a valid number for Scalar Value for Multiply/Divide operations.";
} else if (scalar <= 0 && operation === "divide") {
errorMessage = "Scalar Value must be greater than 0 for division.";
} else {
if (operation === "multiply") {
resultInches = totalInches1 * scalar;
} else { // divide
resultInches = totalInches1 / scalar;
}
}
break;
default:
errorMessage = "Invalid operation selected.";
}
if (errorMessage) {
resultDiv.innerHTML = errorMessage;
return;
}
var sign = "";
if (resultInches < 0) {
sign = "-";
resultInches = Math.abs(resultInches);
}
var finalFeet = Math.floor(resultInches / 12);
var finalInches = resultInches % 12;
resultDiv.innerHTML = "Result: " + sign + finalFeet + " feet " + finalInches.toFixed(4) + " inches";
}
Understanding the Feet and Inches Calculator
The Feet and Inches Calculator is an essential tool for anyone working with imperial measurements, commonly used in construction, carpentry, interior design, and various DIY projects. Unlike standard decimal calculators, this app allows you to perform arithmetic operations directly on measurements expressed in feet and inches, providing results in the same intuitive format.
How it Works
This calculator simplifies complex measurement tasks by converting all inputs into a common unit (total inches) for calculation and then converting the final result back into feet and inches. This ensures accuracy and ease of understanding, especially when dealing with fractional inches.
- Measurement 1 (Feet & Inches): This is your primary measurement. Enter the feet and inches for the first value.
- Measurement 2 (Feet & Inches): Used specifically for addition and subtraction operations. Enter the feet and inches for the second value.
- Scalar Value: This is a simple number used for multiplication and division. For example, if you need to double a length or divide it into three equal parts, you would use the scalar value.
- Operations:
- Add: Sums Measurement 1 and Measurement 2.
- Subtract: Finds the difference between Measurement 1 and Measurement 2.
- Multiply by Scalar: Multiplies Measurement 1 by the Scalar Value.
- Divide by Scalar: Divides Measurement 1 by the Scalar Value.
Practical Examples
Let's look at some real-world scenarios where this calculator comes in handy:
Example 1: Adding Lengths (e.g., for trim or fencing)
You need to calculate the total length of trim for a room. One wall is 12 feet 8 inches, and another is 10 feet 5 inches.
- Set Measurement 1 – Feet: 12, Inches: 8
- Set Measurement 2 – Feet: 10, Inches: 5
- Select Add.
- Result: 23 feet 1 inch. (12'8″ + 10'5″ = 22'13" = 23'1″)
Example 2: Subtracting Lengths (e.g., cutting material)
You have a board that is 8 feet 3 inches long, and you need to cut off a piece that is 2 feet 7 inches.
- Set Measurement 1 – Feet: 8, Inches: 3
- Set Measurement 2 – Feet: 2, Inches: 7
- Select Subtract.
- Result: 5 feet 8 inches. (8'3″ – 2'7″ = 7'15" – 2'7″ = 5'8″)
Example 3: Multiplying by a Scalar (e.g., scaling a design)
A design calls for a component that is 3 feet 4 inches long, and you need to make 4 of them.
- Set Measurement 1 – Feet: 3, Inches: 4
- Set Scalar Value: 4
- Select Multiply by Scalar.
- Result: 13 feet 4 inches. (3'4″ * 4 = 12'16" = 13'4″)
Example 4: Dividing by a Scalar (e.g., finding equal segments)
You have a piece of material that is 10 feet 6 inches long, and you need to divide it into 3 equal sections.
- Set Measurement 1 – Feet: 10, Inches: 6
- Set Scalar Value: 3
- Select Divide by Scalar.
- Result: 3 feet 6 inches. (10'6″ / 3 = 3'6″)
Why Use This Calculator?
Manually converting feet and inches to decimals, performing calculations, and then converting back can be prone to errors and time-consuming. This calculator streamlines the process, ensuring accuracy and efficiency for professionals and hobbyists alike. It's particularly useful when precision is critical, such as in construction blueprints, furniture making, or home renovation projects.