Plywood Sheet Calculator
How many 4x8 sheets you need for any area, with cost.
Enter your values
ⓘ Live results
Results
- Sheets needed
- 22
- Sheet coverage
- 32 sq ft each
- Total coverage
- 704 sq ft
- Material cost
- $1,056.00
Working
- 1640 ft2 x 1.1 / 32 = 22 sheets
Quick answer
Sheets = area divided by the area of one sheet, rounded up, plus a waste allowance for cuts around openings.
sheets = area x (1 + waste) / (sheet L x sheet W)
How to use the Plywood Sheet Calculator
- 1Measure the area you need to sheet, including any overhangs.
- 2Enter your sheet size - most plywood and OSB is 4 x 8 ft.
- 3Allow 10% waste, or 15% for rooms with lots of openings and angles.
Worked example
Using the values the calculator loads with:
Inputs
- Area to cover640 sq ft
- Sheet length8 ft
- Sheet width4 ft
- Waste allowance10 %
- Cost per sheet48 $
Results
- Sheets needed22
- Sheet coverage32 sq ft each
- Total coverage704 sq ft
- Material cost$1,056.00
- 640 ft2 x 1.1 / 32 = 22 sheets
Frequently asked questions
How do I reduce plywood waste?
Lay out a cut plan before buying, run sheets in the direction that crosses the most framing, and stagger joints so offcuts get used at the ends of rows.
What thickness for a subfloor?
3/4 inch tongue and groove over 16 inch joists is the usual standard; go thicker for 19.2 or 24 inch spacing.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.