Paint Cost Calculator

For a standard 12×12 room: about 2 gallons of mid-range paint ($35–50/gal) is $70–100, plus $60–90 in supplies (roller covers, tape, brush, drop cloth, tray). Expect roughly $130–200 all-in for DIY. Premium paint ($55–85/gal) pushes it toward $200–260.

The essentials: roller covers, a roller frame, painter’s tape, an angled brush for cutting in, a drop cloth, and a paint tray with liners. Nice to have: spackle and a putty knife for hole repair, paintable caulk for trim gaps. The calculator above checklists them with typical prices (estimates).

Usually yes per gallon — 5-gallon buckets typically save 10–20% versus single gallons. It makes sense when you need 4+ gallons of one color, e.g. whole-house interiors or exteriors. For a single room, gallons (and quarts for touch-ups) are more practical.

In 2026, a standard bedroom runs $350–800 professionally painted (walls plus trim), per allbetterapp.com’s interior cost survey. Whole-home interiors (2,000 sq ft) run $4,200–11,500. Labor is usually 60–80% of a pro quote — that is what DIY saves you.

Because they genuinely vary by store, brand, and region — a pro-grade brush costs triple a basic one. We use typical US retail prices so the budget is realistic; check your local store for exact numbers before you shop.