How to use these estimates responsibly
Use the calculators to prepare a first-pass order quantity, compare supplier packaging, and understand how waste affects cost. They are most useful before shopping, quoting, or discussing a small project with an installer.
Final purchases should still be checked against product labels, substrate condition, layout direction, local code requirements and supplier minimum order rules. If a project is structural, permitted or safety-critical, use a qualified professional's measurements and specifications.
See how calculations work →