A 14'x14'x4" inch slab will require 2.42 cubic yards of cement.
how many yards of concrete will i need to do a 20 x20 x4 slab
You will need 3.1 cubic yards or 139 80lb bags. This assumes a waste of about 5% which is typical.
You will need a minimum of 7.41 cubic yards.
You will need a minimum of 3.56 cubic yards.
A 14'x14'x4" inch slab will require 2.42 cubic yards of cement.
I would get 12 to be safe.
50 #
how many yards of concrete will i need to do a 20 x20 x4 slab
17.3 cubic yards will do it.
20" x 30" x4"
You will need 3.1 cubic yards or 139 80lb bags. This assumes a waste of about 5% which is typical.
Concrete weighs approx 150 pounds per cubic foot. This slab would weigh approx 1188 pounds.
You will need a minimum of 7.41 cubic yards.
14.8 cubic yards will work but round to 15 to be sure.
56'x46'x4" requires 31.8 cubic yards.
You will need a minimum of 3.56 cubic yards.