It is impossible to answer the question as asked because square feet is a measure of area and a "yard of concrete" actually refers to a cubic yard of concrete.
However, if we make a couple assumptions we can answer the question I THINK you're asking which is, "How many square feet of concrete does one cubic yard of concrete yield if poured to a typical depth of 4 inches?"
The inches of depth can be changed to suit the situation, but in any case giving the poured concrete a depth turns it into a volume which makes it easier to compute the area a cubic yard of concrete will cover.
To begin, we need to convertt the square footage of concrete (which is an area) to a volume. Let's use 6 inches for the depth:
12" x 12" x 6" = 864in^3 or 864 cubic inches
This is the number of cubic inches of concrete in one square foot of concrete poured to a depth of 6 inches.
Now we put a cubic yard into the same terms, cubic inches:
36" x 36" x 36" = 46,656 in^3 or 46,656 cubic inches of concrete.
Now we simply divide number of cubic inches of concrete in a yard of concrete by the number of cubic inches in a square foot of concrete poured to a depth of 6 inches:
46656 / 864 = 54 square feet.
By the way, there are 27 cubic feet in a cubic yard and you may notice that 27 x 2 = 54. That's a result of the depth I chose for the poured concrete--6 inches. A square foot of concrete poured to a depth of 6 inches is equal to one half cubic foot of concrete.
27 / .5 = 54
If you want to figure square foot yield per yard when you pour the slab at 4 inches instead of 6 inches, then simply substitute 4" in the equations for 6".
(36" x 36" x 36") / (12" x 12" x 4") = 81 square feet.
27 square feet at 1 f thick
One square yard is nine square feet, so 27 square feet is equivalent to 3 square yards. So 3 yards of concrete will cover 27 square feet.
Converting square yards to square feet is quite easy. There are 9 square feet in 1 square yard. So to convert just multiply the square yard by 9 to get square feet.
1 square foot = 1/9 square yard (0.111...) 1 square yard = 9 square feet
There are 9 square feet to one square yard, so divide the number of square feet by 9 to find the number of square yards.
1 cubic yard of concrete fills 27/depth in feet square feet.
81 square feet
27 square feet at 1 f thick
A yard of concrete is a measure of volume. A square foot is a measure of area. A cubic yard is 27 cubic feet of stuff. (3x3x3)To relate volume to area you must extend the area over a third dimension. One square foot that is one foot deep will equal one cubic foot. (1x1x1)So, a yard of concrete is 27 cubic feet or 3 feet tall 3 feet wide 3 feet deep. concrete wieghs 150lbs per cubic foot 27cubic feet times 150 pounds is 4050 pounds. This is 1 cubic yard of concrete.
There are 9 square feet in one square yard.
One square yard is nine square feet, so 27 square feet is equivalent to 3 square yards. So 3 yards of concrete will cover 27 square feet.
There are nine square feet in one square yard.
You mean Square Feet in Square Yard.....Right? One square yard is the area occupied by a square of side 1 yard. But 1 yard is 3 feet so one square yard is equivalent in area occupied by a square of side 3 feet, but now the units will be square feet rather than square yard. A square with side 3 feet has an ares of 9 square feet which is the same as 1 square yard.
ONE I THINK, SINCE THERE ARE 27 CUBIC FEET IN A CUBIC YARD OF CONCRETE (WHICH MEASURES 3 FEET BY 3 FEET BY 3 FEET).
There are 9 square feet in one square yard.
9 square feet are in a square yard.
If it is the same as concrete it will cover 162 square feet. concrete covers 81 square feet by 4" deep