Sheathing (OSB/boards)

How many sheets to cover. Calculate in your browser. Results are rounded up to whole packs, the way you buy them.

Sheathing (OSB/boards)

How many sheets to cover.

How we calculate it

What you enter

  • Area (m²)
  • Sheet width (mm)
  • Sheet length (mm)
  • Waste (%)

Formula

sheet area = (Sheet width ÷ 1000) × (Sheet length ÷ 1000)
sheets = ⌈ Area × (1 + Waste ÷ 100) ÷ sheet area ⌉

Example

The default values from the form, run through the same engine:

To buy
11 sheets

What to watch out for

The result is a count of whole sheets with no cutting plan. If you need to know how to cut them, use the 2D sheet cutting calculator.

The Materio app for Android uses the same formula. The site's engine is a 1:1 port of the app's code.

The same formula in the app Materio for Android uses the same engine offline — with the material catalogue and results saved into a project. Download