These calculators provide preliminary planning estimates based on information you enter. Results are provided without a guarantee of completeness or fitness for a particular project.
Your responsibility
You are responsible for verifying measurements, quantities, prices, product requirements, site conditions, permits, and safe construction. Do not rely on a calculator result as structural design or code approval.
Acceptable use
You may use and export estimates for personal or professional planning. Do not misrepresent the results as certified engineering documents or live supplier quotations.