Transparency about our formulas, data sources, and limitations.
Paint manufacturers' published coverage data (Sherwin-Williams, Benjamin Moore); ASTM paint application standards.
Coverage varies by surface texture, paint type, and application method. Rough or porous surfaces may require 20-30% more paint. Primer coats calculated separately.
June 2026. Methodology is reviewed quarterly and updated when underlying data sources or industry standards change.
This tool provides estimates for informational purposes only. Results are not financial, legal, or professional advice. Always consult qualified professionals and obtain multiple quotes before making decisions based on these estimates.