UPDATED 4 OCTOBER 2026

Use estimates with care.

BuilderCalculator provides free calculators for construction and renovation material planning. Use them as a starting estimate, with the assumptions and limitations shown for each calculation.

Before ordering or building

You are responsible for confirming site measurements, actual product coverage and yield, packaging, installation instructions, prices and applicable requirements. Results do not replace structural design, engineering, professional advice, a detailed cutting plan or a verified quote.

Availability and accuracy

We test the calculation engine and publish its methods, but errors and service interruptions can occur. Features and formulas may change. Results depend on your inputs and assumptions; we do not guarantee a particular project outcome or exact purchase requirement.

Saving and sharing

Local storage is device-specific and can be cleared by you or your browser. It is not a backup service. Shared links include measurements and product assumptions; share them only with intended recipients. The privacy page explains hosting, local storage and optional analytics.

Permitted use

Use the service lawfully. Do not interfere with its operation, misuse its infrastructure or present an estimate as professional certification. Contact us if you need to reproduce the interface or a substantial part of the content.

Corrections and contact

Email buildercalculator0804@gmail.com with a calculation discrepancy or question. These terms do not remove rights that applicable law gives you.