Approximately 1000 bricksare utilized in 10 x 10 ft wall (9 inch wall). For 9 inch wall, 350 bricks are utilized in 1 cement bag. Approximately 1050 bricks are utilized in 3 cement bags. For 9 inch mortar, 1:6 where 1 is for cement and 6 is for sand (350 bricks are utilized).
As a general rule, you can order around 600 to 800 pounds of sand for every 100 blocks you are setting, provided that you are using the standard size cinder block. You will use two and a half to three bags of cement mixed in with that sand.