How Much Paint Do I Need?

As a rule of thumb, one gallon of quality interior wall paint covers between 350 and 400 square feet with a single coat. If you're painting highly textured walls, bare drywall, or brick, the surface absorbs more paint, lowering coverage closer to 300 sq ft per gallon. Always check your specific paint can's label for exact manufacturer specifications.

Primer is highly recommended if you're painting over brand-new drywall, making a drastic color change (like dark navy to white), or covering stubborn wall stains. Primer seals the porous drywall surface so your topcoat doesn't soak in unevenly. If you're just refreshing a similar color on a previously painted wall, a self-priming paint may suffice.

Applying two coats is the industry standard for professional results. The first coat establishes the color profile, while the second hides roller streaks, fills minor imperfections, and delivers the true color depth the manufacturer intended. Single-coat coverage is usually reserved for exact-color touch-ups.

Skipping primer on new drywall or a drastic color change — the topcoat absorbs unevenly and looks blotchy.

Painting over a glossy surface without a light sanding first — paint won't grip properly and can peel later.

Not stirring the paint thoroughly before and during the job — pigment settles to the bottom of the can.

Roll in a "W" or "M" pattern first, then smooth it out — this spreads paint evenly before it starts to dry.

Keep a wet edge as you go — letting one section dry before the next overlaps it causes visible lap marks.