Calculate how many blocks you need to build a retaining wall.
Wall Blocks
— blocks
Total for the wall.Usage Tip
Bury the first course about one tenth of the wall height on compacted gravel; a level base course is what keeps the wall straight.
THE MATH
blocks per row = round up( length × 12 ÷ block width )
rows = round up( height × 12 ÷ block height )
total = rows × blocks per row
rows = round up( height × 12 ÷ block height )
total = rows × blocks per row
Block count is the wall divided into rows and columns: blocks per row from the length and block width, rows from the height and block height.
Enter the wall length and height in feet and the block width and height in inches.
Counts round up to whole blocks.
Counts round up to whole blocks.