![]() Be sure to account for this when measuring the wall height.ĭivide the wall’s width in inches by the block width and round up this is the number of columns. ![]() Most experts suggest embedding the first course of blocks below grade about 10% of the wall height to support it correctly.įor example, if the desired wall height is 6 feet, you should embed it below grade by 7-8 inches. Start by measuring the wall’s width and height. To estimate the total number of retaining wall blocks, you’ll first need to calculate the number of rows and columns needed for the wall. How Many Retaining Wall Blocks Do You Need If you are using concrete blocks without mortar, this calculator can be used to get you the results you need. If you’re building a mortared concrete block wall, then try our concrete block calculator. Note: Estimating material for concrete block walls that are mortared is a bit different from a dry stack block wall. Keep reading to learn the formulas to calculate retaining wall materials yourself. If the blocks are all one size, you can simply enter their dimensions as is. So, if the blocks have widths of 6 inches, 8 inches, and 4 inches, you will enter the block width of 18 inches into the calculator.īecause the blocks are grouped, your results will give you the number of “grouped” blocks to purchase. ![]() The depth and height of the blocks should be the same it’s only the width that typically differs. If this is the case for the wall you are estimating, you will need to add the width of the blocks together. Meaning that the walls may be made of blocks of three sizes designed to be used together in one pattern. Keep in mind that retaining wall blocks can be purchased in grouped patterns. How to Estimate Block Walls With Patterns ![]()
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