How many cement mortor used in 100sft block masonry 6x8x12?

How many blocks to build to 5 bed room two story house?

Turn the feet into inches then divide by 8 for the height and 16 for the lenth. EXAMPLE - 24ft long times 12 inches = 288 in. divided by 16 = 18 block long. 8ft high times 12 inches = 96 in. divided by 8 = 12 block high. The typical cinder or concrete block in the US is 15-5/8 long x 7-5/8 tall, with a mortor joint of 3/8 in. its measures 16 in. x 8 in. Dont forget your interior walls where bearing is needed. With wood beams these are needed every 16ft. With metal, the sky is the limit, although the steel beams must be built per size. Also there are many different size thicknees, the typical is 8 in. so the block will be a 8x8x16 in block. They also comes in 4 in. in this case the block is a 4x8x16. 12 inches is a foot but keep in mind that 16 inches is a linear foot.