This page is a product calculator. Please complete the forms below to calculate. How to figure cubic yards of material:  (sq ft)    (depth in inches)   Result:   cubic yards  To find the amount of mortar needed to install a block wall:  (the amount of block) Result:   bags of mortar  To find the amount of sand needed to install a block wall:  (the amount of block) Result:   tons of sand  Celtik Retaining Wall Installation Video View our Belgard Pavers and Celtik Retaining Walls Installation Video to see live Retaining Walls Installation demonstrations. Select your Media Player:  (Real Media)  (Windows Media)  (Apple Quicktime) Select your Media Player: :: DSL/Cable   :: Dial Up