Carpet Installation Cost Calculator

What this carpet installation cost calculator does

If you search for carpet installation cost, you will find ranges so wide that they say little about your room. Carpet is priced by the quality you pick, the padding under it, the labor to stretch it, and often the removal of what was there before. A national average cannot add those up for a 10 by 12 foot bedroom or a 14 by 13 foot living room.

This calculator does the adding with your own numbers. Enter the room size, choose a quality level, and press Calculate. You get a total price, a price per square foot, the amount of carpet to buy, and a cost split. It also plans the roll. Carpet is cut from rolls that are 12 or 15 feet wide, and that width decides how much you buy and how many seams you get. The roll diagram shows the strips, the seams, and the offcut, and a chart prices the same room at basic, standard, and premium quality. If you need the floor area first, use the square footage calculator.

How much does carpet installation cost?

Published figures are a useful reality check, as long as you notice what each one counts. Home Depot’s cost page lists carpet at $1 to $4 per square foot, padding at $1.01, and basic installation at $0.69. Carpet Exchange puts labor at $0.50 to $1.50 per square foot and padding at $0.25 to $1.00. HGTV, citing HomeGuide, gives an installed range of $2 to $9 per square foot, and Homewyse’s national average for May 2026 is $5.27 to $7.72.

The spread comes largely from the carpet itself: HGTV puts synthetic carpet alone at $0.50 to $9 per square foot. Homewyse’s figure includes basic padding installed with the labor and leaves out removal of the old carpet. In practice, the useful move is to add up your own carpet, padding, and labor rates, then compare quotes line by line.

What the price is made of

• Carpet. Priced per square foot or per square yard, and bought by the linear foot from a roll, so you pay for the width you cannot use.
• Padding. The cushion underneath. Some retailers include it and some do not.
• Installation labor. Measuring the seams, setting the tack strip, cutting, seaming, and stretching the carpet.
• Removal. Taking out the old carpet and disposing of it. HGTV says to expect up to $1.60 per square foot, and Home Depot lists removal, disposal, and furniture moving as priced separately.
• Stairs. Carpet Exchange lists stair installation at $150 to $600 in total. The calculator lets you enter a price per step.
• Supplies, trim, and delivery. Flat amounts for transitions, adhesive, or delivery.

How to measure for carpet

Measuring a room for carpet takes five minutes if you do it in order.

1. Measure the longest length and the longest width of the room, wall to wall, at floor level.
2. If the room is not a plain rectangle, split it into rectangles and measure each one. A closet or an alcove counts as its own piece.
3. Measure into the doorway if the carpet will continue there, and ask the installer where it should end.
4. Write the numbers in feet, with inches as decimals: 11 feet 6 inches is 11.5.
5. Draw a quick sketch and mark the doors and windows, so the installer can plan where the seams fall.

Multiply length by width for the floor area. For the 14 by 12 foot room, that is 168 square feet, or 18.67 square yards. This is the net area. It is not the amount you buy, which depends on the roll.

Why roll width changes how much carpet you buy

Residential carpet typically comes in 12 foot and 15 foot widths, according to Flooring Clarity’s guide to carpet widths, and some makers also sell 13.5 foot rolls. You buy from a roll by length, so a room that is a little wider than the roll forces you to buy a second strip.

Take a 14 by 12 foot room. A 12 foot roll covers the 12 foot width in one strip, so you buy 14 linear feet, which is exactly 168 square feet with no seam. Now take a 14 by 13 foot room, which is 182 square feet. With a 12 foot roll, the best plan needs two strips and 312 square feet of carpet, because the extra foot forces a second strip. With a 15 foot roll, one strip of 13 feet covers it, and you buy 195 square feet. At the standard carpet rate of $3.50 per square foot, that is about $410 less spent on carpet, and no seam, though a 15 foot roll may be priced or stocked differently.

That is why the calculator does not use a simple waste percentage. It tries the strips both ways, picks the cheaper layout, and shows the offcut. Ask your supplier which widths they stock for the style you want, then test them here. The same guide also notes that narrower rolls can mean more seams and more cutting.

How much does it cost to carpet a 10×12 room?

A 10 by 12 foot room is 120 square feet, and a 12 foot roll covers the 12 foot side in one piece. With the calculator’s illustrative rates, which include padding and labor, these are the totals for three common room sizes:

So the cost to carpet a 10×12 room at standard quality is about $660, and a 12×12 room is about $792. The rates behind the table are illustrative planning figures, not quotes. All three rooms fit the 12 foot roll without leftover width. If yours does not, the roll plan adds carpet, as in the 14 by 13 foot example above.

Carpet cost per square foot and per square yard

Carpet is often priced per square yard, which is 9 square feet, while installers may quote per square foot. To convert, multiply the square foot price by 9: $4 per square foot is $36 per square yard. To go the other way, divide by 9, so a quote of $36 per square yard is $4 per square foot. Check the unit before you compare two stores, because a number that looks cheap per square yard may not be. The calculator can take every rate in either unit, so you can type the number exactly as your quote shows it.

Replacing old carpet and doing stairs

Replacing carpet adds work that a new-build price does not include. Home Depot lists removal, disposal, and furniture moving as priced separately, and HGTV says to expect up to $1.60 per square foot for taking out old carpet. Before you accept a quote, ask whether it covers removing the old padding and disposing of everything, and whether the installer moves furniture or expects the room to be empty. Enter your removal price in the calculator and the total updates.

Stairs are usually priced as their own line. Carpet Exchange lists $150 to $600 for a whole staircase, a wide range, because the cost depends on the number of steps and how they are finished. Enter the number of steps and your installer’s price per step, and the calculator adds it to the total. Leave both at zero if the stairs are not part of the job.

How to check a carpet installation quote

Ask for an itemized quote with the carpet style, the amount of carpet, the padding, labor, removal, and stairs shown separately. Divide the total by the net floor area to get a price per square foot, then type the quote into the calculator. It shows how far the quote sits above or below your estimate. A higher quote is not automatically wrong. It may count removal or a 15 foot roll that you did not include. Ask which lines explain the difference.

Ways to lower the cost

• Test both roll widths. In the 14 by 13 foot example, the roll width alone changes the carpet you buy by 117 square feet.
• Pick padding on purpose. Carpet Exchange lists padding at $0.25 to $1.00 per square foot, so the choice moves the total on a large room.
• Check what is bundled. If the store includes padding or installation, switch that line off here to compare fairly.
• Ask about the offcut. The calculator shows how many square feet are left over from the roll. Ask whether that piece can cover a closet or landing instead of buying more.
• Bundle the work. Carpeting several rooms with the same carpet from one roll can use the offcuts and may be easier to price than separate small jobs.

How this calculator works

The calculator finds the net floor area, then tests the strips both ways across the room for the roll width you pick, and keeps the layout that uses the least carpet. The carpet you buy is the linear feet times the roll width, plus any extra allowance you add for patterns. Padding and labor are charged on the net area. Removal is per square foot, stairs are per step, and supplies and delivery are flat amounts. The total is divided by the net area for the price per square foot. Metric inputs are converted at 10.7639 square feet per square meter. Everything runs in your browser, and nothing you type is sent anywhere.

What it assumes: the starting rates are illustrative planning figures, not market data and not quotes. The roll plan treats the room as one rectangle, so for an L-shaped room, plan each rectangle separately. It does not model the pile direction or pattern matching, which can raise the carpet needed. I am a software engineer, not a carpet installer, so confirm the plan and prices with your supplier. Change log: October 10, 2026, first published with a cost estimate, roll plan, cost split, quality comparison, and quote checker.

Frequently asked questions

Sources and further reading

For published cost ranges, see Home Depot’s carpet installation cost guide, Homewyse’s carpet installation cost page, Carpet Exchange’s cost guide, and HGTV’s carpet cost article. For roll widths, see Flooring Clarity. Prices change with region and season, so confirm all rates with local suppliers and installers.