A block is 7.5 inches tall plus 1/2 inch for mortar = 8 inches tall. usually 4 to 8 inches wide and the length is 16 inches. these sizes is including the 1/2 inch mortar. to calculate a 20 feet long wall will be 20 feet x 12 inches (converting the feet to inches for better calculation)= 240 inches then divide by the 16 inch of the block which will be 15 blocks on the floor. to calculate how many block going up. each block is 8 inches tall therefore you multiply the height of the wall white is 8 feet x 12 inches = 96 inches tall. then divide by the height of a block ( 8 inches) you will get 12 blocks. then you multiply the 12 x 15 = 180 blocks and thats the total blocks needed
Great video. I always laugh when people say you dont need to know this type of math to function in the real world. Well, try bidding out any construction job or do any construction job without being able to do the math. The way i estimate the amount of blocks needed, is i take the face area of the block, and divide that into the total face area. The face are of a block is .888889 SF and your project is 8x20 or 160sf. So, 160sf / .8888889 = 180 blocks.
let me see if I can make this as simple as I can. I'm assuming you have two walls that are 40' and two walls that are 50'. Both walls are 20' high right?
Multiply 6 x 60 a d a quarter of the width 6 by half of the length 60 and add both 6 x 60 = 360 1.5 x 30 = 45 405 (8"×8"×16". blocks are needed. Thank you for subscribing to my channel!
I just do it in decimals because regular calculator won't factor in inches though Therefore , area of the block is 16" x8" = 1.33x 0.67 = 0.8911 Finally divide the total area of the wall 160 ÷0.8911 = 180 you're welcome 😊
Calculate total area of the wall height 8' x length 20' = 160 Then divide the height 8÷4 =2 Then divide the length 20÷2 = 10 Multiply 2x10 plus 160 = 180
