Paint Coverage
Gallons per coat by surface porosity and coats.
Example
You enter
- Area (ft²) 700
- Coats 2
- Primer needed true
- Surface porosity smooth
You get
- Gallons per coat 2
- Total paint 4 gal
- Primer 2 gal
Details, formula, and sources
Gallons = total_area / coverage_per_gal × number_of_coats × waste factor.
Manufacturer technical data sheets (PDS) by name.
Free at each manufacturer site (sherwin-williams.com, benjaminmoore.com, behr.com).
Estimate. AHJ and licensed professional govern.
Field names used by the API: area_ft2, coats, primer_needed, surface_porosity, gallons_per_coat, total_paint_gallons, primer_gallons
- Default coverage 350 ft²/gal latex unless user suppliesmanufacturer PDS typical