Compound Interest Rate Calculator Formula

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Pizza Cost Calculator

This calculator helps you determine the cost per square inch of your homemade or ordered pizzas, allowing you to compare value and make informed decisions about your next pizza purchase or creation.

Result:

How to Calculate Pizza Cost Per Square Inch

Understanding the true cost of a pizza involves more than just the price tag. By calculating the cost per square inch, you can accurately compare different pizza sizes and deals, ensuring you get the most bang for your buck.

The Formula:

The calculation involves two main steps:

  1. Calculate the Area of the Pizza: The area of a circle is calculated using the formula: Area = π * r², where 'π' (pi) is approximately 3.14159, and 'r' is the radius of the pizza. The radius is half of the diameter.
  2. Calculate the Cost Per Square Inch: Once you have the area, you divide the total cost of the pizza by its area: Cost Per Square Inch = Total Pizza Cost / Area.

A lower cost per square inch generally indicates better value. This calculator automates these steps for you.

function calculatePizzaCost() { var diameter = document.getElementById("pizzaDiameter").value; var cost = document.getElementById("pizzaCost").value; var resultDiv = document.getElementById("result"); // Clear previous results resultDiv.innerHTML = ""; // Input validation if (isNaN(diameter) || diameter <= 0) { resultDiv.innerHTML = "Please enter a valid pizza diameter."; return; } if (isNaN(cost) || cost < 0) { resultDiv.innerHTML = "Please enter a valid pizza cost."; return; } // Calculate radius var radius = diameter / 2; // Calculate area var area = Math.PI * Math.pow(radius, 2); // Calculate cost per square inch var costPerSquareInch = cost / area; // Display the result resultDiv.innerHTML = "The pizza costs $" + costPerSquareInch.toFixed(4) + " per square inch."; } .calculator-container { font-family: sans-serif; border: 1px solid #ddd; padding: 20px; border-radius: 8px; max-width: 600px; margin: 20px auto; background-color: #f9f9f9; } .calculator-container h2, .calculator-container h3 { text-align: center; color: #333; } .input-section, .result-section, .explanation-section { margin-bottom: 20px; } .input-section label { display: block; margin-bottom: 5px; font-weight: bold; color: #555; } .input-section input[type="number"] { width: calc(100% – 22px); padding: 10px; margin-bottom: 15px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; } button { display: block; width: 100%; padding: 12px 15px; background-color: #4CAF50; color: white; border: none; border-radius: 4px; cursor: pointer; font-size: 16px; margin-bottom: 20px; } button:hover { background-color: #45a049; } .result-section h3 { text-align: left; margin-bottom: 10px; color: #4CAF50; } #result { font-size: 18px; font-weight: bold; color: #d9534f; text-align: center; } .explanation-section h4 { margin-top: 15px; color: #4CAF50; } .explanation-section p, .explanation-section li { line-height: 1.6; color: #555; } .explanation-section ol li { margin-bottom: 10px; }

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