Painting Cost Calculator

Interior painting runs about $2 to $4 per square foot of floor area for walls, $3 to $5 with trim, and $4 to $7 for walls, trim, and ceilings, including labor and standard paint. A single average room lands around $300 to $800. The calculator above prices by the floor area you are painting and what gets included. High ceilings, heavy prep, and premium paint move the real quote.

Most painters price by the area and the scope, not by the hour, so they measure the space and count what gets painted: walls, trim, doors, ceilings. Prep is the hidden driver, patching, sanding, caulking, and priming take time before any color goes on, and a wall in rough shape costs more than a clean one. Color changes that need extra coats add too.

Prep and access. Walls with holes, cracks, or water stains need patching and priming first. High or vaulted ceilings need ladders or scaffolding. Trim, doors, and cabinets are slow, detailed work. Dark-to-light color changes need extra coats. Moving and covering furniture adds time. These are what turn a quick estimate into a firm on-site quote.

Either works; painters convert between them. By the square foot is cleaner for a whole house because it scales with the actual area. By the room is simple for a job or two but hides how much surface is really involved, a large room with tall ceilings and lots of trim is not the same as a small bedroom. The calculator uses square footage so it scales with the real size.