Interior Door Quantity Takeoff Calculator

Prepared By: Parag Kamlakar Pal – Owner of www.civilnotess.com

Estimating the quantity of interior doors required for a project can be simplified with the use of a calculator. Below, you’ll find a tool to assist with this calculation based on door dimensions and the total area to be covered.

Example Calculation

Let’s say you have doors with the following dimensions:

• Width: 36 inches
• Height: 80 inches
• Number of doors: 10

And you need to cover a total area of 300 square feet. Here’s how you would calculate the quantity:

1. Convert door dimensions from inches to feet:
• Width: 36 inches / 12 = 3 feet
• Height: 80 inches / 12 = 6.67 feet
2. Calculate the area of one door:
• Door Area = 3 feet * 6.67 feet = 20 square feet
3. Calculate the total door area:
• Total Door Area = 20 square feet * 10 doors = 200 square feet
4. Calculate the quantity required to cover 300 square feet:
• Required Quantity = 300 square feet / 200 square feet ≈ 1.5 doors

You would need approximately 2 doors to cover the 300 square feet area.

Interior Door Quantity Calculator

Door Width (in inches):

Door Height (in inches):

Number of Doors:

Total Area to Cover (in sq. ft.):

Calculate Quantity

function calculateQuantity() {
// Get input values
const width = parseFloat(document.getElementById(‘doorWidth’).value);
const height = parseFloat(document.getElementById(‘doorHeight’).value);
const count = parseInt(document.getElementById(‘doorCount’).value);
const totalArea = parseFloat(document.getElementById(‘totalArea’).value);

if (isNaN(width) || isNaN(height) || isNaN(count) || isNaN(totalArea) || width <= 0 || height <= 0 || count <= 0 || totalArea <= 0) {
alert("Please enter valid numbers greater than zero.");
return;
}

// Calculate door area
const doorArea = (width / 12) * (height / 12); // Convert inches to feet

// Calculate total door area
const totalDoorArea = doorArea * count;

// Calculate required quantity
const requiredQuantity = totalArea / totalDoorArea;

// Display result
document.getElementById('resultText').innerText = `You will need approximately ${Math.ceil(requiredQuantity)} doors to cover ${totalArea} sq. ft.`;
}