Cinder Block Calculator

Wall Length (ft)

Please enter a valid length.

Wall Height (ft)

Please enter a valid height.

Block Length (in)

Enter block length.

Block Height (in)

Enter block height.

Mortar Joint (in)

Enter mortar thickness.

Waste Factor (%)

Enter waste percentage (0-100).

Results

Blocks Needed:

With Waste:

Formula: Total blocks = (Wall Area) / (Block Face Area including mortar). Wall Area = Length x Height. Block Face Area = (Block Length/12 + Mortar Thickness/12) x (Block Height/12 + Mortar Thickness/12). Waste added on top.