🎨 Paint Coverage Estimator

Buy exactly what you need for two full coats.

Total Gallons Needed (2 Coats)

Gallons of Paint

Primer required (1 Coat): 0 Gallons

* Calculation assumes an industry standard of 400 Sq.Ft coverage per gallon. Excludes minor subtractions for standard interior doors and windows to act as your buffer zone.

📏 The 400 Square Foot Rule

Professional painters use a rule of thumb for estimating: 1 Gallon = 400 Square Feet of coverage for a single coat.

      Total Gallons = CEIL((Perimeter x Height x 2) / 400)
    

Why 2 Coats? Almost every professional paint job requires two coats for true color depth, durability, and complete coverage of the old color.
Primer Needs: Primer is usually higher solids and lower coverage (approx 300–350 sq.ft). However, since you only need one coat of primer, we use the standard calculation based on the single-coat square footage.
Texture Factors: If your walls are heavily textured (like popcorn or knockdown), your paint coverage can drop by 20–30%. In those cases, round up your gallon count.

💡 Expert Tip

Always check the back of your specific paint can. Higher-end "One Coat Coverage" paints are much thicker and may only cover 300 sq.ft per gallon, while budget paints might spread further but require more coats to look good.