Interior Painting Cost Calculator

Interior painting is one of the cheapest ways to transform a home, but quotes vary widely by prep and paint quality. This estimates your range by wall area and finish tier.

Direct answer

What does this tool do?

Interior Painting Cost Calculator computes the result directly in your browser — Interior painting is one of the cheapest ways to transform a home, but quotes vary widely by prep and paint quality. This estimates your range by wall area and finish tier. Nothing you enter is uploaded or stored.

What moves cost most: wall condition (prep), ceiling height, paint brand, and trim detail. Labor share: 70-80% — painting is a labor trade. Regional: 0.85× rural to 1.35× metro. Note: the material-quantity paint calculator estimates how much paint you need; this one estimates what the job costs.

How this calculator works

cost = sum(line-item ranges per sq ft) x size x regional factor. Mid-tier items: Paint (mid-grade) $0.35-0.55, Labor (brush + roll) $0.6-0.95, Prep (patching + sand) $0.2-0.4.

Worked example

A 1500 sq ft project at mid tier with the national labor factor (1.0): line items sum to $1,725-$2,850, midpoint about $2,288. Try these numbers in the calculator above; adjust the regional multiplier for your metro.

What drives interior painting cost most

Per square foot of wall, mid-grade paint runs $0.35 to $0.55, brush-and-roll labor runs $0.60 to $0.95, and prep work such as patching and sanding adds $0.20 to $0.40. Across 2026 examples, professional interior painting lands around $1 to $3 per square foot of wall area, with labor accounting for 70 to 80 percent of the total.

Wall condition is the biggest price driver. Smooth walls that only need paint sit near the low end, while surfaces requiring patching, sanding, and priming cost far more per square foot. For scale, a typical 1,500 square feet of wall runs about $2,000 to $4,000 with a pro, so the gap between a light refresh and a heavy-prep job is real money.

How to keep your interior painting budget honest

Measure your wall area carefully before entering it, since the square footage input drives every line in the estimate. Then check the regional labor multiplier, which ranges from 0.85 to 1.35. Because labor is the largest single cost at 70 to 80 percent of the total, a high-cost region can push the same room's quote well above a low-cost one.

Choose your finish tier honestly rather than aspirationally; stepping up a tier raises paint cost on every square foot you enter. If you toggle DIY mode, remember you keep the labor savings of 70 to 80 percent but still buy paint, and the finish quality risk is on you. Compare both numbers before deciding who holds the roller.

How Interior Painting cost is calculated, step by step
Step-by-step: how this interior painting calculator builds its estimate

FAQ

How much does it cost to paint a house interior?

Roughly $1-$3 per square foot of wall area for professional interior painting in 2026 examples. A typical 1,500 sq ft of wall runs about $2,000-$4,000.

Can I save money by doing it myself?

DIY saves the labor cost (70-80% of the total), but you buy paint and lose the finish quality. For a clean result on large areas, a pro is usually worth it.

What affects interior painting price most?

Wall condition and prep are the biggest driver. Walls that need patching, sanding, and priming cost far more per square foot than smooth walls that just need paint.

These are editable example ranges for budgeting, not contractor bids. Actual project cost varies by region, site condition, and finish level. Get 3 quotes before committing.

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Hand-checking a small bedroom estimate

Take one 12x14 bedroom with 8-foot ceilings: two long walls at 112 sq ft and two short walls at 96 sq ft, minus about 30 sq ft for a door and window, gives roughly 386 sq ft of wall. Round to 400. At the mid tier, paint is $0.35-$0.55, brush-and-roll labor $0.60-$0.95, and prep $0.20-$0.40 per square foot, so the low side is 400 x (0.35 + 0.60 + 0.20) = 400 x 1.15 = $460 and the high side is 400 x (0.55 + 0.95 + 0.40) = 400 x 1.90 = $760. The midpoint is (460 + 760) / 2 = $610, or about $1.53 per square foot of wall.

Now apply a regional labor multiplier of 1.15, since labor is 70-80 percent of the bill. Scale both bounds: $460 x 1.15 = $529 and $760 x 1.15 = $874, midpoint $701.50. Doing this by hand once shows you exactly which input moves the total: doubling the wall area doubles every line, but changing the prep tier from $0.20 to $0.40 only moves the midpoint by $40 on this room. The same arithmetic on 1,500 sq ft is where regional multipliers start costing hundreds.

What real quotes include that this math leaves out

The per-square-foot model assumes paintable wall area, but contractors usually price rooms, not square feet. A 12x14 bedroom often carries a flat room rate ($250-$500 per coat in many 2026 metros) regardless of whether it holds 380 or 450 sq ft of wall, so small projects can look expensive on a per-square-foot basis while large projects look cheap.

Three common add-ons are also outside these ranges: ceiling paint (often quoted separately at $1-$2 per square foot of ceiling), trim and baseboards ($1-$3 per linear foot), and furniture-and-tape prep, which some crews bill as a flat $100-$300 per job. A second coat, which mid-grade paints usually need over dark colors, roughly doubles the paint and labor lines rather than adding a small percentage. Finally, the $0.60-$0.95 labor figure assumes an occupied but workable room; moving heavy furniture or working around tenants can push crew time up 20-30 percent. Use the calculator for the wall-paint core, then list ceilings, trim, coats, and furniture handling as separate line items when you compare quotes.