The short answer
Interior painting is priced on the area of surface painted, and most of the price is labor. Four things move the number: how much surface there is, which surfaces are included (walls only, or ceilings, trim, and doors as well), how much preparation the walls need, and how many coats the color change requires. Paint itself is a small part of a professional quote.
Published 2026 figures range from $2 to $6 per square foot, which looks imprecise until you notice that some are quoting walls only and others walls, ceilings, and trim together, and that some measure the floor while others measure the wall. The calculator above states which is which.
How the calculator works
- Wall area from floor area. A house has about 2.7 square feet of paintable wall for every square foot of floor at an 8-foot ceiling height, after doors and windows are subtracted. Taller ceilings scale the wall area in proportion.
- Walls. Wall area is multiplied by a price per square foot for two coats, then by factors for wall condition (1.0, 1.15, or 1.4), color change (1.0 or 1.2), paint quality (1.0 or 1.1), and ceiling height (1.05 at 10 feet, 1.15 at 12 feet, for ladders and staging).
- Ceilings and trim. Each is priced per square foot of floor area. Doors are priced each.
- Location. The local cost level multiplies everything by 0.9, 1.0, or 1.2.
The formula is: total = (wall area × wall price × condition × color × height) + (floor area × ceiling price × height) + (floor area × trim price) + (doors × door price), with paint quality and the local factor applied to every line.
Cost assumptions
Professional labor and paint, two coats, walls in good condition, national baseline. These are planning ranges compiled from published 2026 painting cost guides and contractor price lists, not quotes.
| Surface | Unit | Low | Typical | High |
|---|---|---|---|---|
| Walls | Per sq ft of wall | $0.85 | $1.30 | $2.10 |
| Walls, expressed per sq ft of floor | Per sq ft of floor | $2.30 | $3.51 | $5.67 |
| Ceilings | Per sq ft of floor | $0.70 | $1.10 | $1.70 |
| Trim (baseboards and casings) | Per sq ft of floor | $0.70 | $1.20 | $2.00 |
| Doors, both sides | Each | $50 | $90 | $160 |
Eight projects, priced
Eight-foot ceilings, walls in good condition, similar color, national baseline, unless noted.
| Project | Low | Typical | High |
|---|---|---|---|
| 12 × 12 ft bedroom, walls only | $330 | $510 | $820 |
| 12 × 12 ft bedroom, walls, ceiling, trim, and one door | $580 | $930 | $1,510 |
| 300 sq ft living room, walls, ceiling, and trim | $1,110 | $1,740 | $2,810 |
| 1,000 sq ft, walls only | $2,300 | $3,510 | $5,670 |
| 1,500 sq ft, walls only | $3,440 | $5,270 | $8,510 |
| 1,500 sq ft, walls, ceilings, and trim | $5,540 | $8,720 | $14,060 |
| 1,500 sq ft, walls, ceilings, trim, and 12 doors | $6,140 | $9,800 | $15,980 |
| 2,500 sq ft, walls, ceilings, trim, and 20 doors | $10,240 | $16,330 | $26,630 |
Two changes to the 1,500 square foot whole-house job show how the options compound. With 10-foot ceilings and walls that need moderate repair, the typical price rises from $8,720 to $11,480. With a dark-to-light color change and standard ceilings, it rises to $9,770.
Why preparation decides the price and the result
A coat of paint hides color. It does not hide dents, cracks, or the outline of an old patch. On a good job, more than half the hours are spent before a wall is painted: moving and covering furniture, masking floors and fixtures, filling nail holes, repairing cracks and popped screws, sanding patches smooth, caulking the gaps along trim, spot-priming repairs and stains, and cleaning greasy or dusty surfaces so the paint bonds.
This is where low bids save money. If one quote is much lower than the others, ask exactly what preparation is included. Three items are routinely priced as extras and are worth settling in advance:
- Wallpaper removal, which is slow and often exposes damaged drywall underneath.
- Drywall repair beyond small patches, including water damage and failed tape joints.
- Stain blocking for smoke, water marks, and marker, which bleed through ordinary paint.
Choosing a finish
| Finish | Best for | What to know |
|---|---|---|
| Flat or matte | Ceilings, low-traffic rooms | Hides surface flaws best. Marks easily and is the hardest to clean. |
| Eggshell | Living rooms, bedrooms, hallways | A slight sheen that wipes clean. The usual default for walls. |
| Satin | Kitchens, bathrooms, children's rooms | More washable and moisture resistant. Shows roller marks and wall flaws more. |
| Semi-gloss | Trim, doors, cabinets | Hard, scrubbable surface. Needs careful preparation because it highlights every defect. |
| Gloss | Accent trim, furniture | The most durable and the least forgiving. |
Higher-priced paint lines generally cover in fewer coats and stand up to more washing. Because labor dominates the bill, upgrading the paint adds about 10% to a professional job and is usually worth it in kitchens, bathrooms, and hallways.
How much paint to buy
A gallon covers about 350 square feet per coat on smooth, previously painted walls. Textured walls, new drywall, and bare wood absorb more. To estimate one room, multiply the perimeter by the ceiling height, subtract about 20 square feet per door and 15 per window, multiply by two coats, and divide by 350. A 12 by 12 foot room with 8-foot ceilings works out to 3 gallons for the walls. The calculator shows gallons for whatever area you enter. Buy all the paint for a room in one batch, or mix the cans together, so the color is uniform.
Do it yourself, or hire a painter?
Painting is the most approachable major project in a house, and the savings are real, since labor is typically 70% to 85% of a professional price. It suits a homeowner well when the rooms have standard-height ceilings, the walls are in good shape, and time is available.
Hiring a painter makes more sense when:
- Ceilings are over 10 feet, or there is a stairwell or a two-story entry that needs scaffolding.
- The house needs substantial drywall repair or wallpaper removal.
- You are painting trim, doors, or cabinets, where brush marks and drips are obvious.
- The house is about to be listed for sale and has to be finished in days.
- The home was built before 1978 and painted surfaces will be sanded or scraped.
Our guide to doing it yourself or hiring a professional works through the decision for other projects.
Lead paint in older homes
Homes built before 1978 may contain lead-based paint under the newer layers. Intact paint that is simply being painted over is not usually a hazard. Sanding, scraping, or cutting it creates lead dust, which is dangerous, especially to young children and during pregnancy. Federal rules require contractors who disturb painted surfaces in pre-1978 homes to be certified and to use lead-safe work practices. If you are doing the work yourself, use a test kit or assume lead is present, avoid dry sanding, and clean up with wet methods and a vacuum that has a high-efficiency filter.
How to compare painting quotes
Get three written quotes and check that each one states:
- Every room and surface included: walls, ceilings, trim, doors, closets, and the insides of window frames.
- The number of coats, and whether primer is included where it is needed.
- The paint brand, product line, and finish for each surface, not just a brand name.
- The preparation included, and an hourly or per-item rate for repairs beyond it.
- Who moves furniture and removes outlet covers, hardware, and window treatments.
- Protection of floors and furnishings, and daily cleanup.
- The start date, the expected duration, and the payment schedule.
- A touch-up visit after you have lived with the result for a few days.
To check a quote, divide the total by the floor area and compare it with the per-square-foot figure in the calculator. For vetting painters, see our guide to finding the right contractors.
Ways to lower the cost
- Do the unskilled preparation yourself: move furniture, take down pictures and curtains, remove outlet covers.
- Keep the same color family, which avoids primer and a third coat.
- Paint several rooms in one visit. Setup and travel are spread over more area.
- Leave ceilings that are in good condition. They rarely need painting as often as walls.
- Schedule in winter, when interior painters are less busy in most of the country.
Does fresh paint add value?
Interior painting is not one of the projects in the Cost vs. Value survey, so there is no standard percentage to quote. Its effect is easier to see on the other side of the sale. Scuffed walls and strong personal colors make buyers discount an offer by more than the cost of repainting. Neutral, freshly painted rooms are among the cheapest ways to make a house show well. The renovation ROI calculator covers the projects that do have published resale figures.
Keep the paint record
Six months after a paint job, almost no one can name the color on the hallway walls. Record the brand, the product line, the color name and code, and the finish for each room and each surface, and keep a labeled sample of leftover paint for touch-ups. Photograph the lid label before the can goes into storage. Routine repainting is generally treated as maintenance for tax purposes, not as an improvement that adds to your home's basis, though painting done as part of a larger remodel may be counted with that project.
What the estimate leaves out
The calculator does not price exterior painting, cabinet painting or refinishing, wallpaper installation, decorative finishes, accent walls in a separate color, stair railings and balusters, closet interiors, popcorn ceiling removal, major drywall replacement, or lead abatement. Wall area is estimated from floor area, so rooms with many windows or open floor plans will have somewhat less wall than assumed, and homes with many small rooms somewhat more.
Cost assumptions last reviewed November 2026. See our calculator methodology.