Square yard conversions at a glance
These are exact unit conversions (1 yd = 3 ft = 0.9144 m by definition), so the relationships below hold for any area.
| Area | Square feet | Square yards | Square meters |
|---|---|---|---|
| 9 ft × 9 ft | 81 ft² | 9 yd² | 7.53 m² |
| 10 ft × 12 ft | 120 ft² | 13.33 yd² | 11.15 m² |
| 12 ft × 15 ft | 180 ft² | 20 yd² | 16.72 m² |
| 20 ft × 20 ft | 400 ft² | 44.44 yd² | 37.16 m² |
- This calculator computes the geometric area only. Carpet and sheet goods are cut from fixed-width rolls (commonly 12 ft in the US), so the quantity actually ordered can exceed the geometric area because of roll width, seam placement and pattern repeat — an installer's cut plan is the final word on order quantity.
- 1 square yard = 9 square feet = 0.83612736 m² exactly, per the international yard definition of 1 yd = 0.9144 m.
What is a square yard?
A square yard is a US customary and imperial unit of area equal to the area of a square measuring one yard (3 feet) on each side. Because 1 yard = 3 feet, one square yard contains 3 × 3 = 9 square feet exactly, and equals 0.83612736 square meters exactly (1 yard is defined as 0.9144 m).
Square yards remain the standard selling unit for carpet, some sheet vinyl and sod/turf in the United States, while rooms are usually measured in feet. Converting between the two is the most common reason to use a square yard calculator: measure the room in feet, multiply length by width to get square feet, and divide by 9 to get the square yardage to order.
How to use this square yard calculator
- Measure the length of the area in feet and enter it.
- Measure the width of the area in feet and enter it.
- Read the area in square yards (the material-ordering figure), along with square feet and square meters.
- For L-shaped or irregular rooms, split the space into rectangles, run each one separately and add the results.
The formula behind square yards
The calculator multiplies length by width (both in feet) to get the area in square feet, then divides by 9 to convert to square yards, because one square yard contains exactly 9 square feet. The square-meter figure uses the exact conversion 1 ft² = 0.09290304 m².
Worked example: a 12 ft × 15 ft room has an area of 12 × 15 = 180 ft². Dividing by 9 gives 180 ÷ 9 = 20 yd² — the quantity of carpet to price, before any pattern-matching or seam waste allowance a fitter may add.
Common mistakes
- Dividing square feet by 3 instead of 9 — the linear conversion (3 ft per yard) must be squared for area, so 1 yd² = 9 ft².
- Measuring in feet and inches but entering only the feet (e.g., entering 12 for a 12 ft 6 in wall) — convert inches to decimal feet first (6 in = 0.5 ft).
- Ordering the exact geometric yardage for carpet without allowing for roll width, seams and pattern repeat, which usually require extra material.
- Confusing square yards with cubic yards — square yards measure area (flooring), cubic yards measure volume (concrete, soil, mulch).
Häufig gestellte Fragen
How many square feet are in a square yard?
There are exactly 9 square feet in one square yard. A yard is 3 feet long, so a square yard measures 3 ft × 3 ft = 9 ft².
How do I convert square feet to square yards?
Divide the square footage by 9. For example, a 180 ft² room equals 180 ÷ 9 = 20 square yards.
Why is carpet sold by the square yard?
Selling by the square yard is a long-standing US floor-covering trade convention. Many retailers now also quote per square foot, but broadloom carpet manufactured on 12 ft rolls is still commonly priced and ordered in square yards.
How many square yards do I need for a 12 by 15 foot room?
A 12 ft × 15 ft room is 180 ft², which equals 20 square yards. An installer will typically add extra for seams and pattern matching, so the ordered quantity is usually somewhat higher.
How do I handle a room that is not a simple rectangle?
Divide the floor plan into rectangles, calculate each rectangle's area separately, and add the results. For alcoves and bay windows, it is standard practice to measure to the widest points so the estimate errs on the generous side.
Quellenangaben
- NIST Handbook 44 — Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices: US customary units of area (square foot, square yard).
- NIST Special Publication 811 — Guide for the Use of the International System of Units (SI): exact conversion factors (1 yd = 0.9144 m; 1 ft² = 0.09290304 m²).
- Carpet and Rug Institute (CRI) — carpet specification and installation guidance describing roll-width and seam considerations in ordering broadloom carpet.