Masonry & concrete
Masonry & Concrete Block Calculators
Every tool below shares one rule: the constant behind each number is named and shown. Start with what you are estimating.
Calculators
Concrete Block Fill Calculator
LiveGrout volume, cubic yards, and bag count to fill CMU cells: every figure sourced.
Use this when
You are grouting some or all cells of a block wall and need volume plus bag count.
Concrete Block Calculator
SoonBlock count, mortar, and coursing from wall dimensions.
Use this when
You need how many blocks and how much mortar to build a wall.
Guides
How Much Concrete to Fill Cinder Blocks
The real per-block volume, and why published figures scatter 20-fold.
Read guide →Should You Fill Cinder Blocks With Concrete?
When filling earns its cost, when it is wasted, and what to fill with.
Read guide →Partial Grouting: Why Spacing Changes Your Order by 5.9x
Solid vs partial fill, read from the CMHA grout table.
Read guide →Reference
Concrete & Grout Bag Yield ChartLive
Cinder Block DimensionsSoon