For slabs: ((H * W * D) / 27) *1.10
For fenceposts: one bag per post.
An example for a slab: We are building a maintenance shop for big trucks. It will be 40 feet long, 50 feet wide and the slab will be six inches thick.
So...40 x 50 is 2,000 square feet. Multiply that by 0.5 feet (a 3" slab is 0.25 feet, and a 4" slab is 0.33 feet) to get 1,000 cubic feet. Divide by 27 (the number of cubic feet in a cubic yard) to get 37.0370... cubic yards. Adding 10 percent (this is an industry standard) gives you 40.7407...cubic yards. This is a tricky one...concrete trucks hold either 6 or 11 yards of concrete and you get a full one when you order concrete, so you'll get either 42 yards (seven truckloads) or 44 (four loads).
I need a new driveway in front of my house. I know the type of path I want. WHere do I find concrete contractors?
To measure how much concrete you need for your project, calculate the volume of the area to be filled with concrete by multiplying the length, width, and height. Then, divide the total volume by the yield of the concrete mix to determine the amount needed in cubic yards or cubic meters.
It depends on the concrete company you're working with. You need 33 yards of concrete. Concrete companies deliver the stuff in full truckloads - and no, this is NOT a job for Sakrete. If you can find a company that has Oshkosh front-load mixers, you'll need three truckloads because those trucks hold 11 yards. If you can only find companies with rear-load mixers, you need 36 yards because a rear-load mixer holds 6 yards of concrete.
First find out how much concrete is needed for your project thwn do the calculations.
Well assuming the depth of concrete is going to be 1 meter you will need 846 cubic meters of concrete.
1 cubic yd of a concrete mixture contains about 500 hundred lbs of cement
It depends how thick you want it
For a 4-inch depth you will need at least 7 cubic yards.
You will need at least 14 cubic yards.
Mass is: M=V x d.To calculate the mass you need to know the density of this concrete and also the volume.
For a 4-inch depth you will need at least 7 cubic yards.