Quick scenario presets
-21 sq ft each
-15 sq ft each
2 coats is standard. Dark-to-light color changes often need 3.
Total Interior Painting Cost
$821.00
348 sq ft paintable, 2 coats, Standard
Project Summary
Material Costs
Labor Costs
12,800+ estimates calculated this month
Last updated: 2026-06-02
What Interior Painting Actually Costs
Interior painting is one of the most requested jobs I get asked about, and it is also the one homeowners most often misjudge. They look at the gallon of paint on the shelf, see $40, and assume a room is a cheap job. The paint is rarely the expensive part. Labor is. A professional 2-coat repaint runs $1.50 to $4.00 per square foot of wall and ceiling, and most of that is the hours it takes to do it right.
The calculator above splits the number into materials and labor so you can see exactly where the money goes. Enter a room or a total square footage, pick your paint grade and prep level, and you get a full breakdown you can hand to a client or use to sanity-check a bid.
Try EstimationPro free to turn this estimate into a branded proposal, then let it follow up with the homeowner automatically so you win more of the bids you already send.
Interior Painting Cost by Paint Quality
| Quality | Paint/Gal | All-In Cost/Sq Ft | Durability |
|---|---|---|---|
| Economy (builder grade) | $20-$35 | $1.50-$2.00 | 3-5 years |
| Standard (mid-grade) | $30-$55 | $2.00-$3.00 | 7-10 years |
| Premium (low-VOC, designer) | $45-$85 | $3.00-$5.00 | 10-15 years |
Cost-per-square-foot figures cover materials plus a 2-coat professional labor rate. Heavy prep and painted ceilings push the premium tier toward the top of the range. Source: EstimationPro pricing reference, 2026 retail and labor data.
Worked Examples by Tier
Budget: 10x10 bedroom, economy paint, light prep, walls only
- Wall area: 2 x (10 + 10) x 8 = 320 sq ft, minus 1 door (21) and 1 window (15) = 284 sq ft
- Paint: 2 gallons economy at $28 = $56
- Supplies: $45
- Labor: 284 sq ft x $1.50 x 0.85 prep = $362
- Total: $463 (about $1.63/sq ft)
Standard: 12x12 bedroom, mid-grade paint, standard prep, walls only
- Wall area: 2 x (12 + 12) x 8 = 384 sq ft, minus 1 door and 1 window = 348 sq ft
- Paint: 2 gallons standard at $40 = $80
- Supplies: $45
- Labor: 348 sq ft x $2.00 x 1.0 prep = $696
- Total: $821 (about $2.36/sq ft)
Premium: 16x14 living room, premium paint, heavy prep, ceiling + primer
- Wall area: 2 x (16 + 14) x 9 = 540 sq ft, minus 2 doors (42) and 3 windows (45) = 453 sq ft
- Ceiling: 16 x 14 = 224 sq ft, for 677 sq ft total paintable
- Paint: 4 gallons premium at $65 = $260, plus 2 gallons primer at $25 = $50
- Supplies: $45
- Labor: 677 sq ft x $2.75 x 1.35 heavy prep = $2,513
- Total: $2,868 (about $4.24/sq ft)
What Drives the Price Up
- Prep work. Filling holes and light sanding is baked into a standard quote. Skim-coating, crack repair, wallpaper removal, or water-damaged drywall can add 30% to 40% to labor. This is the single biggest swing on most jobs.
- Ceilings. A painted ceiling adds the room footprint in square feet and slows the whole job down because of the awkward angle and re-masking.
- Trim, doors, and closets. Cutting in around trim and painting doors is detail work that eats hours. A room full of built-ins or six-panel doors costs more than four bare walls.
- Color changes. Going dark-to-light, or covering a bold accent wall, often needs primer plus a third coat. Both add material and labor.
- Height and access. Vaulted ceilings, stairwells, and two-story foyers need ladders or scaffolding and slow everything down.
Where Painters Lose Money
I have seen painters quote a flat per-room price and get burned the moment the walls turn out to be a mess. Pricing by the square foot with prep as its own line keeps you honest. Measure the actual paintable area, account for the condition of the walls, and never fold prep into a single round number you cannot defend later.
Need to size the surfaces first? Our square footage calculator handles odd-shaped rooms, and the paint calculator nails the gallon count. Painting the outside too? The exterior paint calculator accounts for siding texture and house perimeter. Patching or hanging new board first? Check the drywall installation cost calculator.
When you are ready to send the real number, EstimationPro builds the line-item estimate, turns it into a professional proposal, and follows up with the homeowner automatically so the bid does not go cold. Try EstimationPro free.
How to Use This Calculator
Enter the room size
Use room dimensions (length, width, ceiling height) or punch in total paintable square footage directly. A 12x12 bedroom with 8 ft walls is about 348 sq ft of wall after deducting one door and one window.
Deduct doors and windows
Enter how many doors and windows are in the room. The calculator removes ~21 sq ft per door and ~15 sq ft per window so you are not buying paint for surfaces you will not roll.
Pick paint quality and prep level
Economy, standard, or premium paint changes both the price per gallon and how long the job lasts. Prep level matters just as much. Patching, sanding, and skim-coating old walls adds real labor hours.
Add ceilings, primer, or extra coats
Check the ceiling box to add that surface, add a primer coat for bare drywall or big color changes, and bump to 3 coats for dark-to-light changes. The total updates instantly with a full material and labor breakdown.
Interior Painting Cost Formula
Paintable Area = (Wall Area - Door/Window Deductions) + Ceiling Area
Paint Gallons = ceil(Paintable Area x Coats / 350)
Material Cost = Paint Gallons x Price/Gal + Primer + Supplies
Labor Cost = Paintable Area x Labor Rate x Prep Multiplier
Total Cost = Material Cost + Labor CostWhere:
- Coverage
- = ~350 sq ft per gallon per coat (interior, smooth drywall)
- Door Deduction
- = ~21 sq ft per door (average 3x7 ft)
- Window Deduction
- = ~15 sq ft per window (average 3x5 ft)
- Labor Rate
- = $1.50-$2.75/sq ft by paint grade (interior labor runs $1-$4/sq ft)
- Prep Multiplier
- = 0.85 light, 1.0 standard, 1.35 heavy patching/skim coat
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Frequently Asked Questions
How much does it cost to paint a room?
A standard 12x12 bedroom with 8 ft walls costs about $800 to $850 for a professional 2-coat job in mid-grade paint, or roughly $2.30 per square foot of wall area. Budget economy paint with light prep drops it closer to $450. Premium paint with heavy patching and a painted ceiling pushes a larger room past $2,800.
How much does interior painting cost per square foot?
Interior painting runs $1.50 to $4.00 per square foot of paintable surface for materials and labor combined. Economy work lands around $1.50 to $2.00, standard mid-grade jobs run $2.00 to $3.00, and premium paint with heavy prep reaches $3.00 to $5.00. Labor alone is typically $1 to $4 per square foot per the EstimationPro pricing reference.
How do contractors price interior painting jobs?
Most painters price by the square foot of paintable surface, then layer in prep, ceilings, trim, and primer as separate line items. The formula is wall area times labor rate, plus paint gallons times price per gallon, plus supplies. I always quote prep as its own line because that is where jobs blow up. Old, damaged, or heavily patched walls can add 35% to labor. Build a full bid fast with our painting estimate calculator.
How many gallons of paint do I need for a room?
One gallon covers about 350 square feet per coat. A 12x12 bedroom (about 348 sq ft of wall) needs 2 gallons for 2 coats. For exact quantities by surface, use our paint calculator. Always round up. A mid-job trip to color-match a second batch costs more than the extra gallon.
Does prep work really change the price that much?
Yes. Prep is the part of painting that actually takes the time. Filling nail holes and light sanding is standard, but patching cracks, skim-coating, removing wallpaper, or fixing water-damaged drywall can add 30% to 40% to labor. I have walked into rooms that looked fine and found a full day of patching hiding under the old paint. Price the prep honestly or it eats your margin.
Should I paint the ceiling too?
If the walls are getting a fresh color, a tired ceiling will show every flaw next to it. Adding the ceiling increases paintable area by the room footprint (length times width), so a 16x14 living room adds about 224 sq ft. Budget for it up front. Going back to do ceilings after the walls are done means re-masking and a second mobilization.
Is it cheaper to paint myself or hire a contractor?
DIY saves the labor, which is 60% to 75% of a professional quote. Materials for a single room run $100 to $200. A pro charging $2 per square foot turns that same room into an $800 job. The trade-off is time and finish quality. Cutting clean lines and getting even coverage on a ceiling is harder than it looks. For a whole house, hiring usually wins on time alone.
How long does interior paint last?
It depends on the grade. Economy paint: 3 to 5 years. Standard: 7 to 10 years. Premium: 10 to 15 years. Kitchens, bathrooms, and high-traffic hallways wear faster than bedrooms. Spending an extra $15 a gallon on premium paint usually beats repainting a room two years sooner.
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