What this paint calculator estimates
The calculator turns room dimensions or known square footage into paintable area, paint gallons, primer gallons, material cost, labor hours, and a planning total. It is built for interior walls, ceilings, and similar home painting projects.
Why the estimate uses a buffer
Paint coverage changes with wall texture, color changes, repairs, application method, and product quality. A waste buffer helps avoid underbuying, especially when matching a color later could be difficult.
What to verify before hiring a painter
Ask whether the quote includes surface prep, patching, sanding, masking, primer, number of finish coats, trim, ceiling work, furniture protection, cleanup, and touch-up support. A low quote can become expensive if these items are unclear.
Common questions
How much paint should I buy?
The calculator estimates gallons from paintable area, coats, coverage, and a waste buffer. Many projects should round up because touch-ups, texture, porous surfaces, and color changes can use more paint.
Should primer be included?
Primer is usually helpful for new drywall, patched walls, strong color changes, stains, raw wood, or surfaces with uneven absorption. A simple repaint over a similar color may not need a separate primer coat.
Does this replace a contractor quote?
No. It is a planning tool. A contractor quote should still explain prep, repairs, masking, number of coats, materials, cleanup, access, timeline, and warranty terms.