Concrete Block Calculator

Estimate blocks needed for a simple wall (8×8×16). Enter wall dimensions and waste percentage.

Calculator inputs

Enter wall dimensions and waste to estimate standard block count.

Wall lengthfeetWall heightfeetBlock sizeWasteExtra for cuts and breakagepercent

Blocks Needed

95 blocks

80.0 sq ft wall area

1. Enter wall size
Use the wall length and height in feet.
2. Set waste
Keep a small allowance for cuts, corners, and broken blocks.
3. Review blocks needed
The result estimates full blocks before subtracting openings.

20 ft x 4 ft wall

A common small wall estimate with waste included.

Door and window openings

Subtract large openings manually for a tighter order.