Calculate the number of plywood sheets needed to cover a floor, wall or roof from its length and width, with sheet size, waste and total cost.
About this tool
Calculate the plywood sheets needed to cover a floor, wall or roof.
How to use Plywood Calculator
- Enter the length and width of the area.
- Choose the sheet size and waste.
- Read the sheets needed and cost.
Worked example
A 20 × 12 ft floor needs 8 sheets of 4 × 8 plywood, or 9 with 10% waste.
What size is a plywood sheet?
Usually 4 × 8 ft (1220 × 2440 mm).
How much waste should I allow?
10% for simple rectangles, more for complex shapes.
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