Try searcing
take your length width and depth and multiply them all devided by 3 to obtain your yardage. if you dont trust your math just call your local concrete company and they will figure this up for you for free.
To figure out how many yards of concrete you need you take length times width times depth and then divide that by 27. For a 11x14 slab assuming it is 4 inches thick it would take 1.88 yards of concrete. If I was ordering the concrete I would order 2 1/4 yards.
Other people asked questions on similar topics, check out the answers they received:
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them