ConcreteCalculatorHQ

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.

Blocks Needed
95 blocks
80.0 sq ft wall area

How to use this calculator

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

Quick checks

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.