Floor Finishes Carpet Quantity Takeoff Calculator

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

Detailed Calculation

To determine the quantity of carpet required for a flooring project, follow these steps:

1. Measure the Area to be Carpeted

• Length (L) and Width (W) of the room in meters (or feet).
• Area (A) = Length (L) × Width (W)

2. Calculate the Total Carpet Area Required

• Total Area Needed = Area of the room
• Add Wastage: Typically, 5-10% for cutting and fitting.

3. Calculate the Quantity of Carpet Rolls Needed

• Roll Width (RW): Standard roll widths are usually 3, 4, or 5 meters.
• Roll Length (RL): Length of the carpet roll.
• Carpet Roll Area = Roll Width (RW) × Roll Length (RL)
• Number of Rolls Needed = Total Area Needed / Carpet Roll Area

Example Calculation

Room Dimensions:

• Length (L) = 5 meters
• Width (W) = 4 meters

Area Calculation:

• Area (A) = 5 meters × 4 meters = 20 square meters

Adding Wastage:

• Wastage = 10% of 20 square meters = 2 square meters
• Total Area Needed = 20 square meters + 2 square meters = 22 square meters

Carpet Roll Details:

• Roll Width (RW) = 4 meters
• Roll Length (RL) = 10 meters
• Carpet Roll Area = 4 meters × 10 meters = 40 square meters

Number of Rolls Needed:

• Number of Rolls Needed = 22 square meters / 40 square meters = 0.55 rolls
• Since you can’t purchase a fraction of a roll, round up to 1 roll.

Carpet Quantity Calculator

Length (meters):

Width (meters):

Roll Width (meters):

Roll Length (meters):

Wastage (%) :

Calculate

Results

function calculate() {
// Get input values
const length = parseFloat(document.getElementById(‘length’).value);
const width = parseFloat(document.getElementById(‘width’).value);
const rollWidth = parseFloat(document.getElementById(‘rollWidth’).value);
const rollLength = parseFloat(document.getElementById(‘rollLength’).value);
const wastage = parseFloat(document.getElementById(‘wastage’).value);

// Validate inputs
if (isNaN(length) || isNaN(width) || isNaN(rollWidth) || isNaN(rollLength) || isNaN(wastage)) {
alert(‘Please enter all fields correctly.’);
return;
}

// Area of the room
const area = length * width;

// Adding wastage
const totalAreaNeeded = area * (1 + wastage / 100);

// Carpet roll area
const rollArea = rollWidth * rollLength;

// Rolls needed
const rollsNeeded = Math.ceil(totalAreaNeeded / rollArea);

// Display results
document.getElementById(‘totalArea’).innerText = `Total Area Needed (including wastage): ${totalAreaNeeded.toFixed(2)} square meters`;
document.getElementById(‘rollsNeeded’).innerText = `Number of Rolls Needed: ${rollsNeeded}`;
}