Square Footage Tool

Cinder Blocks for
100 SQ FT

Get the exact block count for any 100 square foot masonry project.

Wall Dimensions (Feet)

Length (ft)

Height (ft)

Block Specifications

Select Block Size

Waste Percentage (%)

Estimation Results

Enter dimensions to see results

Pro Tip

A standard 8x8x16 block actually measures 7 5/8" x 7 5/8" x 15 5/8" to account for 3/8" mortar joints.

Blocks Needed for 100 SQ FT

Whether your wall is 10x10, 20x5, or 50x2, 100 square feet is a common benchmark in masonry. For standard 8x8x16 blocks, you will need 113 to 125 blocks.

The Golden Ratio

1.125 Blocks
Per Square Foot

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Cinder Blocks for 100 SQ FT