Carpet Calculator
This carpet calculator finds the carpet area you need from the room size and a waste allowance. Enter the room and the carpet calculator returns the area in square metres, square yards, and square feet. Once you have the area you can estimate the carpet installation cost by multiplying by the price per square yard.
Results
The Carpet Calculator is part of our Floor & Wall collection. Browse more floor & wall to size, convert, and check your work alongside this tool.
What the carpet calculator shows
Carpet is bought by area, so the carpet calculator turns a room size into the area you need, plus a waste allowance for cuts and seams. It reports square metres, square yards, and square feet, since carpet is often priced by the square yard. To calculate carpet area you enter the room dimensions, and the carpet size calculator does the rest.
How to calculate carpet area
To calculate carpet area, multiply the room length by the width, then add the waste allowance:
The result converts straight to other units: one square metre is about 1.196 square yards and 10.76 square feet. A carpet square footage calculator uses the same step, only reporting square feet. Waste matters more for carpet than for hard flooring, because broadloom comes in fixed roll widths and the offcuts are larger. You can also run the figures through a calculator carpet area, a carpet sq ft calculator, a carpet calculator sq ft, a carpet square footage calculator, a carpet size calculator, or a carpet measuring calculator; figure carpet square footage or figuring out carpet square footage is the same length times width plus waste, and an sq ft to carpet area calculator or online carpet calculator does no more than that.
Carpet calculator square feet example
A room 5 m by 4 m with a 10 percent waste allowance. The carpet calculator square feet result is:
So you need about 26.3 square yards of carpet. Enter your own room and the carpet calculator updates every unit at once.
How to use the carpet calculator
Enter the room length and width in metres and a waste allowance, then the carpet calculator returns the area in each unit. A 10 percent waste allowance covers offcuts and seam matching; add more for an odd shaped room or a bold pattern. For measuring for carpet across several rooms, run each room and add the areas, since carpet comes in fixed roll widths.
Reading the carpet calculator result
The area with waste is what you order. Buy from one dye lot so the shade matches across seams, and keep an offcut for later repairs. Carpet is usually sold by the square yard, so the square yard figure is the one to quote against. To turn area into a budget, multiply the square yards by the installed price, which is covered next. The carpet calculator gives the area; your local rate gives the cost.
When measuring for carpet
- Ordering broadloom for a room with the carpet calculator
- Getting a square yard total when measuring for carpet
- Estimating a carpet installation cost from area and price
- Working out an estimate to replace carpet in a room
Common carpet calculator mistakes
- Forgetting roll width. Broadloom comes in fixed widths, so add enough waste for seams and matching.
- Mixing dye lots. Order all the carpet together so the shade matches across seams.
- Skipping the stairs. Measure stairs separately with a stair carpet calculator and add them.
Tips for measuring carpet
- Add about 10 percent waste, more for patterns and odd shapes.
- Quote by the square yard, since carpet is usually priced that way.
- Buy from one dye lot and keep an offcut for repairs.
Carpet installation cost calculator: area times price
A carpet installation cost calculator is really the area from this tool times a price, so the area is the number that matters. Take the square yards, then multiply by the installed price per square yard, which usually bundles the carpet, the underlay, the gripper, and the fitting. That single step turns the carpet calculator into a carpet installation cost estimator: to estimate carpet installation for a 20 m² room, about 24 square yards, at a given rate per square yard, multiply the two. The same method gives an estimate to replace carpet, since ripping out the old carpet adds a small removal charge on top. Get a firm quote for the exact carpet, but this shows the ballpark before you shop, which is what a carpet cost calculator is for. Whatever the label, a carpet cost and installation calculator, a carpet installation calculator, a carpet and installation calculator, a carpet price calculator, a carpet quote calculator, or a carpet fitting cost calculator is the same area times a rate, so compare the cost per square metre carpet or the floor carpet price per square foot across quotes. A carpet replacement cost calculator adds a removal charge, while an estimate carpet cost calculator, a carpet price estimate calculator, a carpet estimate cost calculator, a carpet flooring cost calculator, a carpet cost estimator, a carpet flooring cost estimator, a carpet estimate calculator, or a carpet cost per square foot calculator all reach the same number.
Stair carpet calculator and estimate to replace carpet
Stairs need their own measurement, because each step wraps a tread and a riser. A stair carpet calculator adds the tread depth and the riser height for one step, usually around 450 to 500 mm together, then multiplies by the number of steps and the stair width. Add a little extra for the nosing and for matching a pattern down the flight. For a whole home estimate to replace carpet, total the room areas from the carpet calculator, add the stairs, apply your waste allowance, and multiply by the installed price. When you also repaint the room, the paint calculator sizes the paint for the walls in the same project. If you are laying carpet tiles instead, a carpet tile calculator or carpet tile estimator will calculate carpet tiles needed by dividing the area by one tile, and measuring for carpet on stairs adds each tread and riser. For square yards, a carpet sq yd calculator, a carpet calculator square yards, or a way to calculate sq yards carpet divides the square feet by nine, and a carpet flooring calculator, a carpet estimate, a carpet flooring estimate, or an online carpet estimate all start from this same area.
Carpet square footage to square yards
Common room areas converted for a carpet order, from the carpet square footage the tool reports:
| Area (m²) | Square feet | Square yards |
|---|---|---|
| 10 m² | 108 sq ft | 12.0 sq yd |
| 15 m² | 161 sq ft | 17.9 sq yd |
| 20 m² | 215 sq ft | 23.9 sq yd |
| 30 m² | 323 sq ft | 35.9 sq yd |
Carpet Calculator FAQ
How do I calculate carpet area?
Multiply the room length by the width, then add a waste allowance of about 10 percent. The carpet calculator converts the result to square yards and square feet.
How do I estimate carpet installation cost?
Take the area in square yards from the carpet calculator and multiply by the installed price per square yard, which covers the carpet, underlay, and fitting.
How much waste should I add?
About 10 percent for a plain room, more for an odd shape or a pattern that needs matching, since broadloom offcuts are larger than plank offcuts.
How do I measure stairs for carpet?
Measure the tread and the riser of one step, add them, and multiply by the number of steps and the width. A stair carpet calculator uses that run length.