Flooring Calculator

Mastering the Art of Flooring Calculation

One of the most critical steps in any flooring project is accurate calculation. Whether you're laying tile, hardwood, or carpet, knowing how much material you need is essential. In this comprehensive guide, we'll cover everything you need to know about calculating flooring, including how to calculate, examples, and tips for getting the best results.

Why Calculating Flooring is Important

Before you can begin any flooring project, you need to know how much material you will need. This means calculating the area of the floor to be covered and understanding how that translates into the amount of flooring material required. Accurate calculations can help you budget for your project, avoid waste, and ensure that you have enough material to complete the job.

Understanding Flooring Measurements

Most flooring materials are sold by the square foot. This means that the total area of your floor (length x width) will determine how much material you need. However, some flooring types, such as hardwood planks or carpet rolls, might also require consideration of the width of the individual pieces.

How to Calculate Flooring

Calculating flooring is a relatively straightforward process. Here are the steps involved:

  1. Determine the length and width of your room in feet.
  2. Multiply the length and width to get the total area in square feet.
  3. If you're using tile or carpet, you'll also need to know the size of each piece. Divide the total area by the size of each piece to determine how many you'll need.
  4. If you're using hardwood, you'll need to know how much area each piece covers. Divide the total area by the area each piece covers to find out how many pieces you'll need.

Examples of Flooring Calculations

Let's look at a few examples:

Example 1: Tile Flooring

Let's say you're laying tile in a room that's 15 feet long and 20 feet wide. Each tile is 1 foot by 1 foot. Here's how you would calculate:

  1. Calculate the area of the room: 15 ft x 20 ft = 300 sq ft.
  2. Since each tile is 1 square foot, you would need 300 tiles.

Example 2: Hardwood Flooring

For a room of the same size, if you're laying hardwood planks that each cover 2.25 square feet, here's the calculation:

  1. Calculate the area of the room: 15 ft x 20 ft = 300 sq ft.
  2. Divide the total area by the area each plank covers: 300 sq ft / 2.25 sq ft/plank = approximately 133 planks.

Additional Considerations

While these calculations are straightforward, there are a few additional considerations to keep in mind:

  • Waste Factor: It's always a good idea to purchase a little extra material to account for cuts, mistakes, and future repairs. A common practice is to add 10% to your calculated total.
  • Pattern and Direction: If you're laying tile or hardwood in a specific pattern or direction, you may need more material. Intricate patterns like herringbone or diagonal layouts can increase waste, and thus require more flooring material.
  • Room Shape: While our examples assume a rectangular room, not all rooms are perfect squares or rectangles. For irregularly shaped rooms, divide the room into rectangles and calculate the area of each section. Then, sum these areas to get the total flooring needed.

Flooring Calculator: A Handy Tool

While the manual calculation of flooring is quite straightforward, using a flooring calculator can simplify the process and reduce the potential for errors. With inputs for room dimensions, flooring type, and flooring size, a flooring calculator automates the calculation process, making it easier to estimate the amount of flooring material needed.


Calculating flooring may seem like a daunting task, but with a basic understanding of the process and a few helpful tools, it can be straightforward and manageable. Remember to account for the type of flooring, the size of the pieces, the layout of the room, and the potential for waste. With accurate calculations, you can confidently move forward with your flooring project, knowing that you have the right amount of material to get the job done.


[1] "How to Calculate Flooring," WikiHow, www.wikihow.com/Calculate-Flooring

[2] "Flooring Calculator: Estimate Installation Cost for Different Types of Flooring," Remodeling Calculator, www.remodelingcalculator.org/flooring-calculator/

[3] "Flooring Calculator," Lowe's, www.lowes.com/l/flooring-calculator.html

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