Free Material Cost Estimator
Calculate exact supply units, waste allowances, and contractor markups for drywall, paint, flooring, tile, roofing, and concrete.
Standard 1/2" Gypsum drywall panels (32 sq ft per sheet) including joint tape, joint compound mud, and coarse drywall screws.
Each unit covers ~32 sq ft.
Recommended: 10% for drywall sheets.
Standard contractor procurement markup is 15–25%.
Frequently Asked Questions
Why do I need to add a waste percentage to material orders?
Cutting and fitting materials into rooms results in scrap. Complex room layouts, diagonal tile patterns, and intricate roof hips require 10% to 15% extra material to ensure your crew doesn't run short mid-installation.
What is a normal contractor markup on materials?
Contractors typically mark up materials 15% to 25%. This compensates for procurement time, fuel and delivery costs, inventory holding risk, warranty liabilities, and financing fees.
How many square feet are in a roofing square?
In the roofing industry, one 'square' equals exactly 100 square feet of roof surface. Three bundles of architectural shingles typically make up one square.
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