![]() ![]() ![]() Wall rows = wall height / block height Step Three: Calculate the Retaining Wall Blocks Needed Divide the wall’s height in inches by the block height and round up this is the number of rows.įor example, if your wall is 3 feet high and 30 feet long using blocks that are 6 inches high and 10 inches wide, then you will have 6 rows and 36 columns. 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. Better safe than sorry - why waste gasoline driving too and from the store when you can be prepared in advance? Feel free to use our percentage calculator to figure out exactly how much more you ought to buy.How to Estimate Block Walls With Patterns The calculator will provide you with your total retaining wall cost.Īdditionally, we recommend that you buy an additional 10 % 10\% 10%- 15 % 15\% 15% of all the materials needed to account for any mistakes that may occur, as well as any unexpected repairs. ![]() Input the price of gravel per unit weight - any unit will do.Input the price of a single retaining wall block (and that of a cap block, if you chose that option at the top of the calculator).Our retaining wall calculator also allows you to calculate retaining wall costs. The calculator will return both the volume and weight of gravel you should buy. As for the thickness, it should be at least 12 i n 12\ \mathrm 30 cm) to assure proper drainage, as you can learn at our french drain calculator. Height and length typically correspond to the wall's height and length. It is recommended do use a granular material such as gravel, which is what we chose for the retaining wall calculator.ĭeclare the backfill area's height, length and thickness. It is crucial for keeping the wall steady, as well as making sure it does not get eroded by water. If you've chosen to have a cap row, the number of blocks required for the cap will show as well.īackfill is something that cannot be forgotten when building a retaining wall. You will be given the total number of retaining wall blocks needed. Input the height and length of one of your chosen blocks. Input the height and length of the retaining wall. A cap row is the topmost row of the retaining wall, reaching higher than the wall's actual height, which is often used for decoration. Start by deciding whether your retaining wall will have a cap row (pick "Yes" or "No" at the very top of the calculator). Calculating the number of retaining wall blocks: The retaining wall calculator may seem complicated at first, but don't worry! Just follow this simple set of instructions, and you will get your calculations done in no time.ġ. ![]()
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