Order Exact: Material Calculators for the Trade Counter

Field notes

The calculators distinguish fixed geometry from variable product data: users can replace common bag volumes, bundle counts, square-foot coverage, or board widths with the values printed by a supplier or manufacturer. Outputs are framed around purchasing conventions rather than abstract volume alone, including bags versus bulk, roofing squares versus bundles, and boards, sheets, posts, or sections. The page also documents examples such as a 10% tile allowance and the relationship between stair risers and treads.