Block Calculator

Calculate CMU blocks, mortar, rebar, and grout for masonry walls

Wall Dimensions

Grouted Block Wall

Wall with Openings

Openings

Materials Needed

Blocks
0
Total Blocks
0
Wall Area
sq ft
0
Courses High
0
Blocks/Course
Mortar
0
Type S Mortar
80 lb bags
0
Mortar Volume
cu ft
Coverage estimates:
Blocks per 100 sq ft: ~112.5 (8×16 blocks)
Mortar: ~8.5 bags per 100 blocks (3/8" joints)
Grout: ~1.0 cu ft per 8×8×16 block cell

Block Reference

Block Size Actual Size Blocks/100 SF Weight (lb)
4" × 8" × 16"3⅝" × 7⅝" × 15⅝"112.526
6" × 8" × 16"5⅝" × 7⅝" × 15⅝"112.532
8" × 8" × 16"7⅝" × 7⅝" × 15⅝"112.538
12" × 8" × 16"11⅝" × 7⅝" × 15⅝"112.555
8" × 4" × 16"7⅝" × 3⅝" × 15⅝"22522