Exterior & Outdoor Calculators

Siding, decking and other outdoor building materials.

Siding and decking are both measured from the structure’s footprint, but sold in different units — siding by the “square” (100 sq ft), decking by linear footage of board. Both calculators subtract the things you won’t be covering (doors, windows, or board gaps) before converting to a final material count, which matters more here than on an open bulk-material job.