1. Sketch every area receiving carpet.
Name the room and mark its doorways, closets, alcoves and other changes in shape. Decide which connected areas are part of the job. A bedroom and its closet may need separate measurements even when you want the same carpet throughout.
Measure the actual boundaries with a suitable tool and attach each dimension to your sketch. Check lengths at more than one position if the walls are not parallel. Treat stairs separately: treads, risers, landings and fitting details need their own measurement and installation plan.
2. Work out the carpet square footage.
For a rectangle, multiply length by width. For an L-shaped room, divide the outline into rectangles that do not overlap, calculate each area and add them. Include a closet once; do not count it again inside a larger enclosing rectangle. See the flooring measurement guide for an illustrated L-shaped example.
WORKED FLOOR-AREA EXAMPLE
- Main room
- 12 ft × 10 ft = 120 sq ft
- Separate closet
- 3 ft × 4 ft = 12 sq ft
- Total measured floor area
- 132 sq ft
Convert inches before multiplying. A length of 12 ft 6 in is 12.5 ft, because 6 ÷ 12 = 0.5. Entering 12.6 ft would describe a different length. Use the floor-area calculator to add rectangular sections and display the total in square feet, square meters and square yards.
3. Convert square feet to square yards.
One square yard equals nine square feet. Divide square feet by 9 to convert the same area to square yards; multiply square yards by 9 to go back.
132 sq ft ÷ 9 = 14.67 sq yd, rounded
This conversion changes the unit, not the amount of carpet required. Keep the unrounded calculation until you reach the final display, and ask the retailer which unit and ordering increments apply to the selected product.
4. Let the cutting plan determine what to buy.
Broadloom carpet is supplied in rolls. Available widths depend on the product, so the measured floor area is not automatically a usable cutting layout. The installer must consider where pieces meet, their direction, trimming and any pattern that needs to match.
The Carpet and Rug Institute’s installation guidance calls for measurements and drawings that account for seams, carpet direction and unusual areas. Its residential and commercial installation standards provide the detailed planning requirements.
Keep three records together: measured floor area, selected carpet specifications and the installer’s proposed cut plan. Ask how the quoted quantity accounts for each. A blanket waste percentage cannot replace that plan, and the room-area calculator does not create seams or optimize carpet cuts.
Can a carpet measurement app help?
A room measuring app can help organize the floor outline, wall lengths and area used in a carpet-planning conversation. I Measure Pro’s Android workflow also keeps rooms in named projects and supports dimensioned PDF reports. It does not generate a carpet cut sheet or a purchase-ready material estimate.
Read how to measure a room with an Android phone and check supported devices and capture conditions. Independently verify dimensions before ordering. Android is available on Google Play; the Apple version for iPhone and iPad is in development.
Before you send the measurements.
Do I include closets?
Include every area receiving carpet, with each section clearly labeled. Identify exclusions so the retailer does not have to guess.
Is carpet area the same as the quote quantity?
Not necessarily. Roll width, layout, seams, pattern matching and trimming can change the amount ordered.
What should I send the installer?
Send the room sketch, checked dimensions, units, included areas and selected carpet details. Keep the final layout and quantity confirmation with the project, whether it is for your home, a customer or a managed property.
