Square Yards Calculator
Square Yards Calculator works out Area and Area including waste from Shape, Length / diameter / base and Width / triangle height / second parallel side. The default figures on this page give area (square yards) of 12 yd2; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
2 steps
- Plan area = 12 ft x 9 ft = 108 ft^2
- Reported in square yards: 108 ft^2 = 12 yd2
Its 8 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
3 sources
Keep this result
Save it, change one figure, then compare the two
The calculation stays free. Save this scenario, adjust one assumption, save that too, and put them side by side to see exactly what the change costs you. A free account keeps 5 scenarios and 2 comparisons; Personal makes both unlimited and adds exports and private links. Nothing is saved unless you press Save.
What the Square Yards Calculator calculates
Calculates floor or wall area for rectangular, square, round, triangular, trapezoidal or elliptical spaces, adds a waste allowance and estimates material quantity and cost.
How to use this Square Yards Calculator
Enter Shape, Length / diameter / base, Width / triangle height / second parallel side and Distance between the parallel sides. Area updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Area, Area including waste and Area (square feet).
The method follows NIST Special Publication 811, Guide for the Use of the International System of Units (exact 1 ft = 0.3048 m, 1 acre = 43,560 ft2), Weisstein, Eric W. "Trapezoid", "Ellipse" and "Circle". MathWorld — A Wolfram Web Resource and Ramanujan, S. "Modular Equations and Approximations to pi" (1914) — second approximation used for the ellipse perimeter.
What you can compare
Change one input at a time to see how it affects Area, Area including waste and Area (square feet). The inputs you can vary are Shape, Length / diameter / base, Width / triangle height / second parallel side, Distance between the parallel sides, Additional areas to add and Waste / cutting allowance.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
What is 12x12 in square yards?
Calculates floor or wall area for rectangular, square, round, triangular, trapezoidal or elliptical spaces, adds a waste allowance and estimates material quantity and cost. On this page it is computed from Shape, Length / diameter / base and Width / triangle height / second parallel side and shown as Area, Area including waste and Area (square feet).
Is a square yard 3 feet by 3 feet?
Calculates floor or wall area for rectangular, square, round, triangular, trapezoidal or elliptical spaces, adds a waste allowance and estimates material quantity and cost. On the figures this page opens with — length / diameter / base 12 and width / triangle height / second parallel side 10 — the area (square yards) is 12 yd2. Put your own figures in their place and the working updates beside the result.
What is 1 sq yard in feet?
It needs Shape, Length / diameter / base, Width / triangle height / second parallel side, Distance between the parallel sides, Additional areas to add and Waste / cutting allowance. Nothing else is required, and the figures stay in your browser.
What's the easiest way to find square yards?
The result gives Area, Area including waste, Area (square feet), Area (square metres), Area (square yards) and Area (square inches), each labelled with its unit so the figure can be read on its own.
How do I calculate square yards?
Calculates floor or wall area for rectangular, square, round, triangular, trapezoidal or elliptical spaces, adds a waste allowance and estimates material quantity and cost. Open “How this is worked out” beside the result to see each step for your own figures.
What information do I need for the Square Yards Calculator?
You need Shape, Length / diameter / base, Width / triangle height / second parallel side, Distance between the parallel sides, Additional areas to add, Waste / cutting allowance, Length unit and Coverage per box / gallon / roll. The page opens with default figures that give area (square yards) of 12 yd2, so you can see the scale before entering your own.