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Painting Labor and Materials Estimator

Estimate the full cost of a painting job from wall and ceiling area, number of coats, paint coverage, and 2026 painter labor rates per square foot and per hour. Separates labor from materials including paint, primer, and consumables for interior and exterior work.

Job Type

Walls only. $1.50-$3.50/sq ft labor. Most common interior job.

Paint Quality Tier

Surface Texture

$30-$50/gal interior, $35-$55 exterior. Most common quality.

Dimensions

Wall Length (linear ft)

Total perimeter of walls to paint.

Wall Height (ft)

Ceiling Area (sq ft)

Used only if job includes ceilings.

Number of Coats

Include Primer?

Your Results

Enter dimensions and paint type, then click estimate.

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Introduction

A painting bid is two numbers added together: labor and materials. Labor is the bigger one, running 75% to 85% of total painting cost per HomeAdvisor and Angi 2026 data. Painter labor runs $1.50 to $3.50 per square foot for interior walls, $2.00 to $4.50 for walls plus ceilings, and $3.00 to $6.00 for a full interior with trim and doors. Exterior work runs 20% to 40% higher than interior due to setup, ladders, and weather protection. On the materials side, 2026 paint pricing from UseCalcPro and Sherwin-Williams puts budget paint at $15 to $25 per gallon, mid-tier at $30 to $50, and premium at $60 to $95, with coverage ranging from 350 to 400 square feet per gallon on smooth drywall down to 200 to 300 on heavily textured surfaces. This calculator estimates the full job cost from wall dimensions, paint quality, surface texture, coats, and primer, separating labor from materials so the bid covers both.

What This Calculator Does

This tool estimates the total cost of a painting job including labor and materials. You select the job type (interior walls, walls plus ceilings, full interior with trim, or exterior), paint quality tier, and surface texture. You enter wall length, wall height, ceiling area, number of coats, and whether primer is included. The calculator computes paintable area, gallons of paint needed adjusted for texture and coats, paint cost, primer cost, supplies cost, labor cost, total cost, and the labor share of total cost.

The Formula

Paintable Area = (Wall Length x Wall Height) + Ceiling Area (if included) | Gallons Needed = ceil((Paintable Area x Coats) / (Coverage per Gallon x Texture Multiplier)) | Paint Cost = Gallons Needed x Price per Gallon | Labor Cost = Paintable Area x Labor Rate per Sq Ft | Total Cost = Paint Cost + Primer Cost + Supplies Cost + Labor Cost

The paintable area is wall length times wall height, plus ceiling area if the job includes ceilings. The gallons needed is the paintable area times the number of coats, divided by the coverage per gallon adjusted for surface texture. Smooth drywall yields 350 to 400 sq ft per gallon, lightly textured (orange peel) 300 to 350, and heavily textured (knockdown, popcorn) 200 to 300. The paint cost is gallons times the price per gallon, which ranges from $22 for budget to $85 for premium in 2026. The primer cost is optional, using a coverage of about 250 sq ft per gallon at $25 per gallon. The supplies cost covers brushes, rollers, tape, and drop cloths at $0.10 to $0.20 per square foot. The labor cost is paintable area times the labor rate per square foot, which ranges from $2.50 for interior walls to $4.75 for exterior with heavy prep.

Step-by-Step Example

Select the job type and paint tier

A painter bidding an interior walls-only job selects that type with mid-tier paint at $45 per gallon and 375 sq ft per gallon coverage on smooth drywall.

Enter dimensions

The room is 40 linear feet of wall at 8 feet height, with 2 coats and primer included. Paintable area: 40 x 8 = 320 sq ft.

Review the materials

Gallons needed: ceil((320 x 2) / 375) = 2 gallons. Paint cost: 2 x $45 = $90. Primer: ceil(320 / 250) = 2 gallons x $25 = $50. Supplies: $50.

Review the results

Labor at $2.50/sq ft x 320 = $800. Total cost: $90 + $50 + $50 + $800 = $990. Labor is 81% of total, within the 75% to 85% benchmark.

Real-World Use Cases

Interior Room Bid

A painter bidding a 12 by 12 room with 8-foot ceilings enters 48 linear feet of wall at 8 feet height with 2 coats of mid-tier paint to build a labor and materials bid for the homeowner.

Whole-House Exterior Estimate

A contractor estimating a 2,000 sq ft home exterior selects the exterior smooth siding job type, enters the wall area, and adds the heavy prep multiplier for stucco that needs scraping and caulking.

Paint Quality Trade-off

A homeowner weighing budget paint at $22 per gallon against premium at $85 per gallon runs the estimate both ways to see the materials cost difference, since premium paint often covers in one coat and reduces labor.

Textured Ceiling Coverage Check

A painter pricing a knockdown ceiling job selects the heavily textured surface to adjust coverage down to 250 sq ft per gallon, ensuring enough paint is ordered for the texture without a mid-job supply run.

Common Mistakes to Avoid

Bidding labor only and forgetting materials. Materials are 15% to 25% of total painting cost, but they are still real money. A bid that covers labor only loses the paint, primer, and supplies cost on every job. Always include materials in the bid.
Using flat wall area without subtracting openings. Doors and windows are not painted (usually), so subtract about 20 sq ft per door and 15 sq ft per window from the wall area. Bidding the gross wall area overstates paint and labor by 10% to 15% on a typical room.
Ignoring surface texture on coverage. Smooth drywall yields 350 to 400 sq ft per gallon, but knockdown or popcorn texture yields 200 to 300. Bidding smooth coverage on a textured ceiling understates the paint needed by 30% to 40% and forces a mid-job supply run.
Quoting one coat when two are needed. A color change, especially from dark to light or over a repaired patch, needs two coats. Quoting one coat to win the bid and then charging for the second coat erodes trust. Bid the coats the job actually needs.
Underpricing exterior prep. Exterior jobs are not just painting. They include scraping, caulking, sanding, priming bare spots, and repairing rot. The prep is often 30% to 50% of the exterior labor. Bidding the paint only and eating the prep time guarantees a loss.

Frequently Asked Questions

How much does a painter charge per square foot in 2026?

Per HomeAdvisor and CurrentCost 2026 data, painter labor runs $1.50 to $3.50 per square foot for interior walls, $2.00 to $4.50 for walls plus ceilings, $3.00 to $6.00 for a full interior with trim and doors, and $1.50 to $6.50 for exterior depending on prep. Labor is 75% to 85% of total painting cost.

How much does paint cost per gallon in 2026?

Per UseCalcPro 2026 pricing, budget paint (Behr Premium Plus, Glidden) runs $15 to $25 per gallon, mid-tier (Behr Marquee, Sherwin-Williams SuperPaint, Benjamin Moore Regal Select) runs $30 to $50, and premium (Benjamin Moore Aura, Sherwin-Williams Emerald, Farrow and Ball) runs $60 to $95. Primer runs $15 to $45 per gallon depending on type.

How much paint do I need for a 12 by 12 room?

A 12 by 12 room with 8-foot ceilings has 48 linear feet of wall times 8 feet height, or 384 sq ft of paintable wall area. At 375 sq ft per gallon with 2 coats, you need ceil((384 x 2) / 375) = 3 gallons of paint. Add 1 gallon of primer if priming. Subtract about 20 sq ft per door and 15 sq ft per window if not painting them.

What percentage of painting cost is labor?

Labor runs 75% to 85% of total painting cost, with materials at 15% to 25%. The labor share is higher on small jobs (where setup and travel are a larger share) and on jobs with heavy prep. The materials share is higher when using premium paint at $60 to $95 per gallon.

How much more does exterior painting cost than interior?

Exterior painting typically runs 20% to 40% more than interior per square foot, due to setup, ladders, scaffolding, weather protection, and the prep work of scraping, caulking, and repairing siding. Exterior jobs with heavy prep like stucco or peeling paint can run 50% to 100% more than a comparable interior job.

Accuracy and Disclaimer

This calculator applies 2026 national average painting labor and material rates from HomeAdvisor, Angi, CurrentCost, PaintPricing, and UseCalcPro. Actual costs vary by region, paint brand, surface condition, and job complexity. Regional variations can swing prices by 30% to 40%, with high-cost metros running 1.4x to 1.6x national averages. This estimate excludes drywall repair, wallpaper removal, and lead paint abatement. This is not a construction bid or estimate. Consult a licensed painting contractor for a firm bid on a specific project.

Conclusion

A painting bid that separates labor from materials is a bid that does not lose money. Run the estimate here, then check the labor share against the 75% to 85% benchmark to confirm the bid is balanced. Pair this with our Paint Coverage Calculator to size paint for a single room, or the Contractor Markup Calculator to layer overhead and profit on top of this estimate.

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