Introduction

Calculating the quantity and dimensions for swinging doors is crucial for accurate project takeoffs. This post provides a detailed explanation of how to calculate door and frame quantities and includes a calculator to automate these calculations.

Calculation Details

The following parameters are used for the calculations:

• Door Width (W): The width of a single door in feet.
• Door Height (H): The height of a single door in feet.
• Frame Thickness (F): The thickness of the door frame in inches.
• Number of Doors (N): The total number of doors.

1. Door Area Calculation

The area of a single door is calculated using:

Door Area = W × H

2. Total Door Area

The total door area is:

Total Door Area = Door Area × N

3. Frame Area Calculation

The frame thickness must be converted to feet:

Frame Thickness (ft) = F / 12

The perimeter of a single door is:

Perimeter = 2 × (W + H)

Thus, the frame area is:

Frame Area = Perimeter × Frame Thickness (ft)

4. Total Frame Area

The total frame area is:

Total Frame Area = Frame Area × N

Interactive Calculator

Use the calculator below to input your door specifications and get the calculated quantities instantly.

Door Width (ft):

Door Height (ft):

Frame Thickness (in):

Number of Doors:

Calculate

function calculate() {
// Get input values
const width = parseFloat(document.getElementById(‘width’).value);
const height = parseFloat(document.getElementById(‘height’).value);
const frameThicknessInches = parseFloat(document.getElementById(‘frame-thickness’).value);
const numberOfDoors = parseInt(document.getElementById(‘number-of-doors’).value);

// Convert frame thickness to feet
const frameThicknessFeet = frameThicknessInches / 12;

// Calculate door area
const doorArea = width * height;

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

// Calculate frame area
const perimeter = 2 * (width + height);
const frameArea = perimeter * frameThicknessFeet;

// Calculate total frame area
const totalFrameArea = frameArea * numberOfDoors;

// Display results
document.getElementById(‘door-area’).textContent = `Single Door Area: ${doorArea.toFixed(2)} sq ft`;
document.getElementById(‘total-door-area’).textContent = `Total Door Area: ${totalDoorArea.toFixed(2)} sq ft`;
document.getElementById(‘frame-area’).textContent = `Single Frame Area: ${frameArea.toFixed(2)} sq ft`;
document.getElementById(‘total-frame-area’).textContent = `Total Frame Area: ${totalFrameArea.toFixed(2)} sq ft`;
}