OSB Roof Sheathing Calculator

Calculate OSB panels needed for roof sheathing with span ratings.

Surface area measurement (length × width for rectangles).
sq ft
Distance between repeated elements.
How thick the material or layer is.

Results

Panels Needed:
Calculated panels needed based on your inputs.
-panels
Span Rating:
Calculated performance rating.
-
Est. Cost @ $15/panel:
Sum of all calculated values.
-$
Reference: Industry Standards. APA span ratings for structural panels.