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Calculator

Blocks Calculator

Estimate blocks needed for a lot fence or wall perimeter.

Block Estimate

What measurements do you have?
Choose the face size of the block that will show on the wall.
Wall length
The calculator estimates a square perimeter from this area.
Wall height
Subtract doors or gates (optional)
Enter up to four openings to subtract from the wall area. Leave unused openings at 0.

Opening 1

Opening 2

Opening 3

Opening 4

Assumptions
  • The calculator preserves the original area factors, side-length factors, block face areas, opening factors, and Math.round behavior.
  • When total area is used, the calculator estimates a square lot perimeter from the square root of the converted area.
  • Openings are optional and subtract wall area before estimating blocks.
Disclaimer

This calculator provides an estimate for educational purposes only. It does not replace advice from construction specialists, contractors, or engineers.