# Square Yards Calculator

URL: https://speedycalculator.com/calculators/construction/square-yards/
Last updated: 2026-10-25

> The square yards calculator finds the area of a rectangle, circle or triangle in square yards, square feet and square metres, and estimates the cost of carpet, turf, concrete or fabric sold by the square yard.

## Inputs

- Area shape
- Length (or diameter) (ft, m, in, yd, cm)
- Width (or triangle height) (ft, m, in, yd, cm)
- Number of identical areas
- Waste allowance (%)
- Price (/yd², /ft², /m²)

## Results

- Area
- Area to buy (with waste)
- Cost

## Formula

```
Square yards = square feet ÷ 9
Rectangle: L × W; Circle: π D² ÷ 4; Triangle: base × height ÷ 2
```

## Explanation

Carpet, artificial turf, landscape fabric and some paving work are priced by the square yard. A square yard is 3 ft × 3 ft, so it contains 9 ft². Measure in whatever unit is handy; the calculator converts everything for you.

### How to use the Square Yards Calculator

- **Area shape**
- **Length (or diameter)**
- **Width (or triangle height)**
- **Number of identical areas**
- **Waste allowance**
- **Price**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Pick the shape, enter the dimensions, the number of identical areas and a waste allowance. The area is computed in square metres internally and shown in square yards, square feet and square metres, then multiplied by the price per square yard.

### Tips for an accurate estimate

- Measure every dimension twice and write the unit next to each number – most estimating errors are unit mix-ups (inches entered as feet).
- Pick the unit in each field's menu instead of converting by hand; the calculator converts everything to the same base before it multiplies.
- Round up only at the very end. Rounding each dimension first can add several percent to the final quantity.
- Suppliers sell in whole units – bags, boxes, sheets or quarter yards – so always round the final order up, not down.

### Common mistakes to avoid

- Mixing square and cubic units: square feet measure area, cubic yards measure volume, and you need a depth to go from one to the other.
- Using nominal lumber sizes where actual sizes matter (a 2×4 is really 1½ × 3½ in).
- Forgetting that 1 yd³ = 27 ft³, not 9 ft³ (9 is for square yards).

### Inputs explained

FieldWhat to enterArea shapeChoose one: Rectangle / square, Circle (length = diameter), Triangle (length = base, width = height)Length (or diameter)Units: ft, m, in, yd, cmWidth (or triangle height)Units: ft, m, in, yd, cmNumber of identical areasA numberWaste allowanceIn %PriceUnits: /yd², /ft², /m²

### What each result means

- **Area to buy (with waste)** = [Area]×(1 + [Waste allowance]÷100)
- **Cost** = [Area to buy (with waste)]×[Price]

### Example values

How the main result changes when **Length** changes and everything else stays at the example values above:

Length (or diameter) (ft)Area (yd²)7.51011.2515152018.752522.5303040

## Worked example

Inputs — Area shape: Rectangle / square; Length (or diameter): 15 ft; Width (or triangle height): 12 ft; Number of identical areas: 1; Waste allowance: 10 %; Price: $30 /yd².

Results — **Area = 20 yd²**; Area to buy (with waste) = 22 yd²; Cost = $660.00.

## Key terms

- **Square yard**: 9 ft², 1,296 in² or 0.836 m².

## FAQ

**How many square feet are in a square yard?**
Nine (3 ft × 3 ft). Divide square feet by 9 to get square yards.

**How many square yards is a 12 × 15 ft room?**
180 ft² ÷ 9 = 20 yd².

**How do I convert square yards to square metres?**
Multiply by 0.8361.

**What formula does the Square Yards Calculator use?**
Square yards = square feet ÷ 9.