well that is an easy one
Answer in feet cubed is :
X = 80 x (12/12) x (18/12)
X = 80 x 1 x 1.5
X = 120 cubic Feet
1 cubic yard = 27 Cubic F
so
Y = 120 / 27
Y = 4.44
Now typically you would order some extra to cover for spillage
2.2 Yards
To calculate the volume of concrete needed, first convert all measurements to feet. The sidewalk is 3 feet wide (36 inches), 0.33 feet thick (4 inches), and 60 feet long. The volume in cubic feet is calculated as: 3 ft (width) x 0.33 ft (thickness) x 60 ft (length) = 59.4 cubic feet. To convert cubic feet to cubic yards, divide by 27; thus, you need approximately 2.2 cubic yards of concrete.
To calculate the volume of a concrete slab that is 40 feet long, 60 feet wide, and 6 inches thick, first convert the thickness to feet (6 inches = 0.5 feet). The volume in cubic feet is 40 x 60 x 0.5 = 1,200 cubic feet. To convert cubic feet to cubic yards, divide by 27 (since there are 27 cubic feet in a cubic yard). Thus, 1,200 cubic feet is approximately 44.44 cubic yards.
1.8 Cubic yards of concrete is 48.6 cubic feet. Each 80lb bag of concrete is .6 cubic feet. Therefore, you would need 81 bags. Hope that helps. GEO
1.7 cubic yards of concrete Dondeb...that is an incorrect answer...Lets do this in steps.... 1. 80 X 30 = 240 Surface feet. Divide by .50 because you want it 6 inches deep. 2. 240 divided by .50 = 120 3. 120 is the total square feet of material needed. 4. Divide by 27 as there are 27 cubic feet to a cubic yard....(120 divided by 27) 5. 4.4 cubic yards of concrete are needed, that is if you don't take into account up to 10% for loss or shortage. If this were my project I would order 5 cubic yards.
2.2 Yards
1.77 cubic yards
39.1116 cubic yards
16.05
19.55
For 576 square feet at a depth of 4 inches, you will need 7.11 cubic yards.
1000 square feet/9 = 111.1 square yards of concrete 6 inches thick. This is the same as 111.1/4.5 = 24.7 cubic yards of concrete.
151/9 cubic yards for every 12 inches thick
2.2222222201902215 cubic yards
How many square yards in a 20x18 feet 3 inches thick
It is about 166.67 cubic feet and you will need just over 6.17 cubic yards of concrete.
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.