Spike's Calculators


Plywood Sheathing # of Sheets for Wall or Floor Calculator

Spike's Calculators

Estimate the number of sheets needed for sheathing a wall or floor with plywood or OSB.
Number of sheets needed based on 4' x 8' sheet size

Note: The number of sheaths needed is based on square footage of the area and the square footage of one sheath of plywood. Sometimes you will end up with leftovers that are too small to use and you may need additional sheathing material.

Length feet inch
Width feet inch


Area ft²
Number of Sheets #

The Calculator

  1. length in feet and inches
  2. width or height in feet and inches

The Results

  1. square feet of wall or floor area
  2. number of sheets needed
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