Honest Little Apps / Field notes
Wall paint takeoff calculator
Turn measured wall dimensions into a whole-gallon materials line. Deduct unpainted openings, apply coats, and enter the coverage printed on your paint.
How to use the result
For walls of different heights, run separate calculations. This estimate covers one product and color at a time; primer, ceilings, trim, supplies, tax, and labor are excluded. Actual coverage depends on the surface and application. Example: 48 ft × 8 ft minus 36 sq ft of openings leaves 348 sq ft; two coats at 350 sq ft per gallon call for two whole gallons.