These scenarios are not quotes. They show the calculation mechanics with visible assumptions so every value can be replaced with project-specific inputs.
A 12 × 14 ft room with an 8 ft ceiling has about 416 sq ft of gross wall area before subtracting openings. At 2 coats and 400 sq ft/US gal, the order of magnitude is 2.1 gal before waste. Adjust for doors, windows, porosity and the selected product.
Open the related guide or calculator →For 320 net sq ft with an 8% allowance, the order quantity becomes 345.6 sq ft. If a box covers 20.5 sq ft, round up to 17 boxes. Always verify the exact SKU coverage and manufacturer requirements.
Open the related guide or calculator →With a 12% planning contingency, reserving $3,000 leaves about $22,000 for committed work. Contingency is not a required expense: it protects against unknowns and should remain separate from the contract price.
Open the related guide or calculator →V14 connects envelope, air, fire, structure, water and code instead of treating each project in isolation.
V28 connects small details that become costly once finishes are closed.