Concrete is a mixture of sand, gravel, cement, and water. Generally, you have 1 part cement, 2 parts sand, and 3 parts gravel. Sand makes up about 1/4 or 1/3 of a cubic foot. At 100 pounds per cu ft that is about 25-35 pounds.
96 cubic feet of concrete
volume of trench = 10' x 3' x 54' = 1620 cubic feet therefore 1620 cubic feet of concrete will be required.
Volume of concrete needed = 4 x 12 x 1/3 = 4 x 4 = 16 cubic feet
3 cubic feet of it.
That depends on how thick you want it. Multiply 18ft * 18ft * thickness (in units of feet). That will give you your volume in cubic feet. To convert it to cubic yards divide your answer by 27.
96 cubic feet of concrete
(3.5/12) x 120 = (.2917) x 120 = 35.004 Cubic Feet Concrete is sold by the cubic yard. 35.004 cubic feet = 1.3 cubic yards
625 times 0.5 = 312.5 cubic feet will be needed
how many cubic feet in a yard of concret
On average, you will need about 0.5 cubic feet of concrete per 4x4 fence post.
volume of trench = 10' x 3' x 54' = 1620 cubic feet therefore 1620 cubic feet of concrete will be required.
9x12 feet at 4 inches deep: 1.3 cubic yards.
On average, 8 cubic feet of concrete can weigh around 4,000-4,500 pounds, depending on the density of the concrete mix.
4300 x .66 * = 2838 cubic feet / 27 = 105.11 cubic yards. ( *.66 = 8" )
Volume of concrete needed = 4 x 12 x 1/3 = 4 x 4 = 16 cubic feet
An 80 pound bag of premix concrete will make .6 cubic feet of cured concrete. There are 27 cubic feet in a cubic meter, so it would take 45 80 pound bags to make one cubic meter.
To calculate the amount of concrete needed for a 4x4 post, you can use the formula: volume length x width x height. For a 4x4 post, assuming a height of 8 feet, the volume would be 4 x 4 x 8 128 cubic feet. This would require approximately 1.5 cubic yards of concrete.