Masonry Reference Data
The lookup tables and definitions behind the calculators, for contractors, DIYers, and engineers who want the raw numbers with their source attached. Every figure here traces to a named standard, whether that is ASTM C90 for block dimensions and strength, the CMHA grout and mortar estimating tables, or a manufacturer datasheet for bag yields, and the citation is shown next to the number rather than hidden. Use these pages to check a nominal-versus-actual block size, confirm how many cubic feet a bag of concrete yields, or see how many blocks a bag of mortar lays before you trust a calculator result. Each page links back to the calculator that puts the data to work.
Concrete & Grout Bag Yield Chart
How many cubic feet each bag yields, how many 8 in blocks it fills, and bags per cubic yard, from manufacturer datasheets and the CMHA grout table.
UpdatedCinder Block Dimensions: Nominal vs Actual
Nominal vs actual concrete block sizes: a standard 8 x 8 x 16 cinder block measures 7 5/8 x 7 5/8 x 15 5/8 in. Shell, web, and cells sourced to ASTM C90.
UpdatedWhat Is a CMU Block?
CMU blocks explained: cinder block vs concrete block, ASTM C90 and C129 strength limits, density classes, and the common unit shapes and where each is used.
UpdatedMortar Bag Coverage Chart
How many blocks and bricks one bag of mortar lays, on both the CMHA estimating basis and manufacturer data sheets, with bags needed by block count.
Updated