Concrete Block Calculator & Cinder Block Estimator
Calculate Blocks Needed for Wall
How to use: Enter your wall dimensions in feet. Standard blocks (8"×8"×16") cover approximately 1.125 sq ft including mortar joints.
Note: Add 5-10% waste factor for cuts and breakage.
Frequently Asked Questions
How many blocks per square foot?
Standard 8"×8"×16" concrete blocks cover approximately 1.125 square feet per block when accounting for mortar joints. This means you need about 0.89 blocks per square foot.
What is the difference between concrete block and cinder block?
Concrete blocks are made with portland cement and aggregates. Cinder blocks (older style) use coal cinders. Modern construction uses concrete blocks which are stronger and more durable.