Free Flooring Calculators

Planning new tile, hardwood, laminate or carpet? These free flooring calculators help you measure the space, estimate how much material to order and what it may cost. Each one shows its formula and a worked example, so you can check the math yourself.

Flooring calculators

How to estimate flooring

Most flooring projects follow the same four steps.

1. Measure the room. Write down the length and width of each space. For an L-shaped or irregular room, split it into rectangles and measure each one.
2. Find the area. Use the square footage calculator to get the total in square feet.
3. Work out the quantity or cost. Enter the area into the flooring calculator or the tile calculator to see how much to buy, or estimate the price with the hardwood installation price calculator or the carpet installation cost calculator.
4. Add extra for waste. Cuts, offcuts and mistakes use up material, so order more than the exact area, then round up to whole boxes.

Flooring basics

Area for a rectangular room is length times width. A room 12 feet by 15 feet is 180 square feet. Rooms with alcoves, closets or an irregular shape are measured in sections and added together.

Waste. A common starting point is 5 to 10 percent extra for a straight layout, and 10 to 15 percent for diagonal, herringbone or other complex patterns. Rooms with many corners need more. Your supplier or installer can tell you what they recommend for your material.

Boxes and units. Flooring is usually sold in boxes that cover a set number of square feet, so check the coverage on the label and round up to full boxes. Carpet is often sold by the square yard, and one square yard is 9 square feet.

Spare material. Keeping an extra box or two from the same batch helps when you need a repair later, because the color and pattern of a new batch can differ.

Cost depends on the material, the area, your subfloor, labor rates and your location. Prices change over time, so treat any estimate as a starting point and get written quotes from local installers. For a price estimate, try the hardwood installation price calculator or the carpet installation cost calculator.

Flooring calculator FAQs

Are these flooring calculators free?

Yes. All Calctoolz calculators are free and need no account.

How do I calculate square footage for flooring?

Multiply the length of the room by its width, both in feet. For an irregular room, split it into rectangles, find the area of each and add them together.

How much extra flooring should I buy?

A common starting point is 5 to 10 percent extra for straight layouts and 10 to 15 percent for diagonal or complex patterns. Ask your supplier or installer what they recommend.

How accurate are the results?

Results are estimates based on standard formulas and the numbers you enter. Measure carefully, and confirm quantities with your supplier or installer before you buy.

More calculator hubs

Planning a bigger project? Explore our other calculator collections.

These calculators give planning estimates only. They do not replace advice from a licensed contractor or installer. Read our Disclaimer for details.