Source-backed cost guide
Interior Painting Cost Calculator
HomeGuide's published whole-house examples from 1,000 to 3,000 square feet map consistently to about $3–$4 per square foot of floor space. DWELVRA uses that pattern for this planning calculator.
Quick answer
About $3–$4 per square foot in the whole-house examples used here
Source basis: HomeGuide, 2026 cost guide. DWELVRA's “modeled typical” value is the arithmetic midpoint of a published range, not a measured national average.
Interior Painting Cost Calculator
Use this as a planning range, not a contractor quote. Only the inputs shown in the calculator affect the result; no hidden regional or complexity multiplier is applied.
Estimated project cost
Actual pricing can differ because contractor scope, location, access, materials and site conditions vary. DWELVRA is an independent informational publisher, not a contractor or professional estimator.
Modeled examples
| Project input | Low | Modeled typical | High |
|---|---|---|---|
| 1,000 sq ft | $3,000 | $3,500 | $4,000 |
| 1,500 sq ft | $4,500 | $5,250 | $6,000 |
| 2,000 sq ft | $6,000 | $7,000 | $8,000 |
| 2,500 sq ft | $7,500 | $8,750 | $10,000 |
| 3,000 sq ft | $9,000 | $10,500 | $12,000 |
Modeled typical values are calculated midpoints. They should not be described as source-published averages unless a source explicitly labels them that way.
Floor space versus paintable surface
These are different measurements. HomeGuide also reports $1–$3 per square foot of paintable surface area and broader $3–$7-per-floor-square-foot guidance. DWELVRA does not combine those systems. This calculator uses only the repeated $3–$4 pattern in the source's whole-house examples.
Comparison with Angi
Angi's July 9, 2026 interior-painting guide reports $2–$6 per square foot based on home size and a reported average of $2.75 per square foot. DWELVRA keeps that source separate rather than blending unlike datasets.
Room-level context
HomeGuide's room guide reports about $300–$1,000 per room for walls only and $600–$2,000 per room for walls, trim and ceilings. Room geometry and scope vary, so those figures are not merged into the whole-house calculator.
What can change the final quote?
- Walls only vs. broader scope
- Ceilings, trim and doors
- Wall height
- Surface repairs and prep
- Number of colors and coats
- Paint quality
- Furniture moving
- Regional labor
These factors are not represented by hidden multipliers unless the calculator explicitly asks for them.
Questions to ask before hiring
- Does the quote include walls only or also ceilings, trim and doors?
- How many coats are included?
- What prep and repairs are included?
- Which paint product and finish are specified?
- Who buys the paint?
- How are unexpected surface problems priced?
FAQ
How much to paint a 1,500-square-foot house interior?
HomeGuide's whole-house table reports $4,500–$6,000.
Why not use $1–$3 per square foot?
That figure refers to paintable surface area, not home floor area.
Does the calculator include ceilings and trim?
It is a whole-house planning model; confirm the contractor's exact scope in writing.
Methodology
DWELVRA records the source, date, unit and project scope behind each published cost range. Calculator arithmetic is intentionally simple and visible. Different publishers' datasets are not silently averaged together. Condition-dependent extras stay outside the base formula unless a source supports a clear, comparable adjustment.
Sources
- HomeGuide — Interior Painting Cost — 2026 guide
- HomeGuide — Cost to Paint a Room — Feb. 6, 2026
- Angi — Interior House Painting Cost — July 9, 2026