Paint Cost Per Gallon (2026): Interior & Exterior by Brand and Grade

Interior paint costs $20 to $110 per gallon in 2026, and exterior paint runs higher at $28 to $120 per gallon. Economy, contractor-grade gallons are $20-$35, standard mid-grade paint is $35-$55, and premium lines run $55-$110. Exterior gallons carry a 20-40% premium over their interior twins because of UV inhibitors and mildewcide. Coverage holds near 350-400 square feet per gallon across every grade, so the per-gallon price — not the spread sheet — drives your material bill. Price your own job by the gallon with our Exterior Paint Cost Per Gallon Calculator before you load the cart.

Two springs ago I priced eight gallons of mid-grade interior paint for a 1,400-square-foot repaint at four stores in one afternoon. Valspar Signature came in at $304, Behr Ultra at $336, Benjamin Moore Regal Select at $464, and Sherwin-Williams SuperPaint at $496 — a $192 spread on the exact same coverage. I bought the Valspar at $38 a gallon and waited out a sale for the trim enamel. The lesson stuck: the grade you pick moves the price far more than the brand badge on the can.

This is the brand-agnostic, per-gallon overview. It maps interior and exterior paint by grade (economy, mid, premium) and by brand (Behr, Valspar, Benjamin Moore, Sherwin-Williams), then converts every per-gallon price into cost per square foot of wall. For a deep dive on one brand's ladder, see our Sherwin-Williams paint price guide. Every number below reconciles with the 350-400 sq ft per gallon coverage spec the calculators use.

Paint Cost Per Gallon by Grade

Paint sells in three quality grades, and the grade sets the price far more than the color or the sheen. Economy or contractor-grade paint is the no-frills bottom: thin film build, fewer scrubs before it burnishes, and a 3-5 year interior repaint cycle. Mid-grade is the homeowner workhorse that covers in two coats and lasts 7-10 years. Premium adds true one-coat hide, stain and scuff resistance, and a decade-plus of color retention. The table below shows 2026 interior list prices by grade.

The jump from economy to premium+ is about $75 a gallon at the extremes, but the coverage rate barely moves — a $25 contractor gallon and a $104 designer gallon both spread across 350-400 square feet. What you buy with the extra money is film durability, hide, and how many years pass before you climb the ladder again. For a guest-room ceiling repainted every decade, economy paint is the rational choice; for a mudroom wall that takes daily abuse, premium earns its ticket.

Paint Cost Per Gallon by Brand

The four brands most US homeowners actually choose between split cleanly by where you buy them. Behr lives at Home Depot and Valspar at Lowe's, both anchoring the value-to-mid range. Benjamin Moore and Sherwin-Williams sell through paint-specialty stores and own the premium tiers. The table below lists 2026 interior list prices for a representative line at each grade per brand.

Two patterns jump out. First, the box-store brands (Valspar, Behr, Glidden) undercut the specialty brands by $10-$30 a gallon at every grade, which is why a budget-conscious DIY job almost always starts at Home Depot or Lowe's. Second, the specialty brands' "economy" line ($45) costs about what a box-store premium line ($48) does — you are paying for the brand's floor, not a bargain. If your project is a whole house and you want one consistent finish, a mid-grade box-store paint like Behr Ultra or Valspar Signature at $38-$42 a gallon is the value sweet spot.

Interior vs Exterior Paint Cost Per Gallon

Exterior paint costs more per gallon than its matching interior line — usually 20-40% more — and the gap is real chemistry, not marketing. Outdoor formulas pack UV inhibitors to fight pigment fade on sun-baked south and west walls, mildewcide to block green and black staining in humid climates, and elastomeric resins that flex with the 1.5-3% seasonal expansion of wood and stucco. Drop interior paint on a sunny exterior wall and it chalks and fails in 1-2 years. The table compares grade-for-grade.

Brand examples make the premium concrete. Sherwin-Williams Emerald runs about $95 a gallon interior versus $104-$120 exterior. Benjamin Moore Aura is $70-$80 interior against $75-$95 exterior. Behr Marquee sits near $48 interior and $50-$58 exterior. The exterior surcharge shrinks as you climb grades because premium interior paint already carries some of the same resin technology. Exterior coverage also runs lower in the real world — 250-350 sq ft per gallon on weathered siding versus 350-400 indoors — which compounds the per-gallon premium into a bigger total. Size your outdoor job with the Exterior Paint Cost Per Gallon Calculator and your indoor job with the Interior Paint Cost Calculator.

Cost Per Square Foot: Turning Gallons Into Wall Cost

A per-gallon price only matters once you translate it into the cost to cover your actual walls. Paint covers 350-400 square feet per gallon on one coat of smooth interior drywall, and the standard job is two coats. To get cost per square foot, divide the gallon price by the coverage rate, then multiply by the coat count. The table below uses a 375 sq ft midpoint for the two-coat figure.

Run the math on a real room and the grade gap stays small. A standard 400 sq ft room painted twice needs 800 sq ft of coverage, which at 375 sq ft per gallon is about 2.1 gallons. In economy paint that room costs roughly $60 in paint; in premium+ it runs about $213. The $153 difference is real money on one wall but becomes rounding error against the $3,000-$8,000 labor line on a hired whole-house job, where paint is only 10-20% of the invoice. That is exactly why professionals rarely cheap out on paint: the material delta is trivial next to the labor they would re-spend on an early repaint. For an exact gallon count on any room, plug your dimensions into the Paint Calculator.

Why Paint Prices Vary So Much

Three levers set the price on the shelf. The first is resin and pigment load: premium paint carries more titanium dioxide (the pigment that gives hide) and higher-quality acrylic resin (the binder that gives durability), which costs the manufacturer more and passes straight through. The second is additives — UV inhibitors, mildewcide, and stain-blocking surfactants add $5-$20 of cost per gallon that budget lines simply leave out. The third is the sales channel, covered below.

Raw-material inflation has moved every SKU in the last three years. Paint climbed roughly 8-12% between 2023 and 2026 as titanium dioxide, acrylic resin, and solvent costs passed through. A gallon that retailed at $79 in 2023 is $85-$88 today; a $42 mid-grade can is now $47. If your sense of paint pricing is even two or three years old, add $3-$10 per gallon to every figure in your memory.

The store you walk into matters too. Box stores (Home Depot, Lowe's) sell their house and exclusive brands at a structural discount because they move enormous volume and skip the specialty-store overhead. Paint-specialty stores (Sherwin-Williams, Benjamin Moore dealers) charge more at list but discount aggressively through loyalty programs and contractor accounts. A licensed contractor account at Sherwin-Williams can net 40-70% off list, which is why a hired painter who supplies the paint can sometimes beat the price you would pay yourself even after their markup.

How to Pay Less Per Gallon

1. Wait for a sale at the specialty stores. Sherwin-Williams runs storewide 30-40% off promotions roughly every four to six weeks, often around holiday weekends. That single discount cuts a $62 SuperPaint gallon to about $40.
2. Buy box-store brands for value jobs. Behr Ultra ($42) and Valspar Signature ($38) deliver mid-grade durability for $15-$25 less per gallon than the specialty mid-grade lines.
3. Buy the 5-gallon bucket. A bucket typically drops the effective per-gallon price about 10% versus single gallons, which is the right call for any job over four rooms.
4. Join the free loyalty program. PaintPerks (Sherwin-Williams) and Benjamin Moore rewards save about 10% off retail plus stackable coupons.
5. Ask a hired painter to supply the paint. Even after a 10-20% markup, their contractor-net price often lands below what you would pay at retail.
6. Skip quarts for full walls. A $22 quart works out to $88 per effective gallon — reserve quarts for trim and touch-ups only.

For the full painting bill — where labor, not paint, drives 70-85% of the cost — see our guide on how much interior painting costs in 2026. If your project is cabinets rather than walls, the enamel and labor math is different; our breakdown of the cost to paint kitchen cabinets professionally in 2026 covers it.

Frequently Asked Questions

paint cost per gallon

Paint costs $20 to $110 per gallon for interior lines in 2026 and $28 to $120 per gallon for exterior lines, sorted by quality grade. Economy contractor-grade paint runs $20-$35, standard mid-grade is $35-$55, premium is $55-$80, and top-tier premium+ reaches $80-$110 indoors. Exterior paint carries a 20-40% premium over the matching interior line for UV inhibitors and mildewcide. A gallon covers 350-400 square feet on one coat regardless of grade, so the per-gallon price drives your material bill more than coverage does.

How much does a gallon of paint cost in 2026?

A gallon of interior paint averages $35-$55 for the mid-grade lines most homeowners buy, with economy gallons as low as $20 and premium+ gallons reaching $110. Box-store brands like Behr and Valspar undercut specialty brands by $10-$30 per gallon at every grade. A 5-gallon bucket lowers the effective price about 10%, while a quart works out to roughly $88 per effective gallon — far more expensive per unit than a gallon.

What is the cheapest paint per gallon?

The cheapest paint is economy contractor-grade at $20-$35 per gallon, such as Valspar 2000 (about $25) or PPG Glidden Premium (about $28). These flat-finish lines suit rentals, ceilings, and new construction rather than scrubbable living-area walls, and they typically need a repaint in 3-5 years. For a washable finish at a low price, a mid-grade box-store line like Behr Ultra at $42 covers in two coats and lasts 7-10 years, which usually beats economy paint on cost per year.

Why does exterior paint cost more per gallon than interior?

Exterior paint costs 20-40% more per gallon than interior because it adds UV inhibitors, mildewcide, and elastomeric resins built to survive sun, rain, and freeze-thaw cycles. Sherwin-Williams Emerald is about $95 interior versus $104-$120 exterior, and Benjamin Moore Aura is $70-$80 interior against $75-$95 exterior. Exterior coverage also runs lower at 250-350 square feet per gallon on weathered siding, which raises your effective cost per square foot beyond the per-gallon premium alone.

How do I turn paint price per gallon into cost per square foot?

Divide the gallon price by the coverage rate, then multiply by the number of coats. A $60 gallon covering 375 square feet works out to $0.16 per square foot for one coat, or $0.32 per square foot for the standard two coats. On a porous surface where coverage drops to 200 square feet per gallon, the same $60 paint jumps to $0.30 per square foot per coat. As a sanity check, paint materials rarely exceed 20% of a hired painter's total quote.

Is premium paint worth the higher cost per gallon?

Premium paint at $55-$110 per gallon is worth the price on high-traffic and high-stain walls, where its one-coat hide and washability stretch the repaint cycle to 12-15 years, but it is overkill for low-use rooms. On a single 400 sq ft room the grade difference is only about $150 in paint, which is trivial against the $3,000-$8,000 labor cost of an early repaint on a hired job. Match premium paint to hallways, kitchens, and kids' rooms, and use economy or mid-grade for guest rooms and ceilings.

Related Articles

• Sherwin-Williams Paint Price (2026) — The single-brand deep dive: SuperPaint, Cashmere, Duration, and Emerald by line, sheen, and sale price.
• How Much Does Interior Painting Cost in 2026 — The full painting bill, where labor drives 70-85% of the quote and paint is the minority line.
• Cost to Paint Kitchen Cabinets Professionally (2026) — Where enamel grade and labor diverge from wall-paint math.

Related Calculators

• Exterior Paint Cost Per Gallon Calculator — Price exterior paint by brand, grade, and channel against your wall area.
• Paint Calculator — DIY gallon counter for interior and exterior, including windows, doors, and primer coats.
• Interior Paint Cost Calculator — Convert per-gallon prices into a total room or whole-house paint cost.
• Exterior Paint Cost Calculator — Price the full hired exterior job including labor, prep, and regional rates.

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Cost data reflects 2026 list and street prices, with coverage based on the standard 350-400 sq ft per gallon specification. Sale, contractor, and regional pricing vary by store and market. This article is for educational purposes; confirm current pricing with your local paint retailer before buying.