Short answer
A 2,200 sqft two-story stucco home needs approximately 22 gallons of body paint for two coats (the formula yields 21.4 gallons before rounding). That figure is based on a 190-foot perimeter, 18-foot wall height, 3 doors, 16 windows, and stucco's 1.2 siding factor. You'll also need about 9 gallons of primer and 7 quarts of trim paint to complete the job.
How this calculator works
The calculator builds the estimate in four steps: gross wall area, deductions, siding adjustment, and coat multiplication.
Step 1 — Gross wall area
Perimeter × wall height gives you the total exterior wall surface before any openings are subtracted. For this house: 190 ft × 18 ft = 3,420 sq ft. This assumes a simple rectangular or roughly rectangular footprint. Bay windows, bump-outs, and other projections that add to the perimeter will be captured automatically when you measure the true perimeter.
Step 2 — Deductions for doors and windows
Each exterior door deducts 21 square feet (a standard 3×7 rough opening with a small margin). Each window deducts 15 square feet, which represents a typical mid-size double-hung or casement. This house has 3 doors and 16 windows:
- Door deduction: 3 × 21 = 63 sq ft
- Window deduction: 16 × 15 = 240 sq ft
- Net paintable wall area: 3,420 − 63 − 240 = 3,117 sq ft
If you have oversized picture windows or floor-to-ceiling glass panels, you can increase the per-window deduction manually by adjusting the window count proportionally.
Step 3 — Siding factor
Stucco is not a flat surface. The peaks and valleys in a sand-finish or float-finish stucco texture increase the real surface area beyond what a tape measure captures, and the porosity means the first coat soaks in more paint per square foot. The 1.2 siding factor multiplies the net area by 20%:
3,117 × 1.2 = 3,740 effective sq ft
For reference: smooth-painted wood or fiber cement uses 1.0, vinyl siding uses 1.1, and rough cedar shake or heavily textured stucco can reach 1.3.
Step 4 — Coats and coverage rate
The adjusted area is multiplied by the number of coats (2), then divided by 350—the square footage per gallon that most exterior latex and 100% acrylic paints achieve on a properly prepared surface:
(3,740 × 2) ÷ 350 = 21.4 gallons
Round up to 22 gallons when purchasing.
Secondary outputs
The calculator also returns two supporting figures:
- Primer gallons: net area ÷ 350, single coat = 8.9 gallons (buy 9). Primer is strongly recommended on bare, repaired, or previously chalking stucco. It seals the surface so your topcoat coverage rate actually holds.
- Trim paint quarts: perimeter ÷ 30, rounded up = 7 quarts. This covers window casings, door surrounds, corner boards, and fascia. Trim paint is usually a different sheen (semi-gloss or gloss vs. flat or satin for the body), so it's budgeted separately.
What the calculator does not include
- Soffits, eaves, and porch ceilings — measure and add those separately
- Paint for the garage door face — add 2 quarts if using body color
- A waste buffer — add 10% for brush/roller work, 15–20% if spraying
Recommended materials
For a 22-gallon exterior stucco job, you want a 100% acrylic paint with good hide and a flexible film that handles stucco's thermal movement without cracking. A quality airless sprayer cuts application time significantly on textured surfaces, and a 24-foot extension ladder gets you safely to second-story soffit lines without over-reaching.
- Behr Marquee exterior paint (1 gallon) — 100% acrylic formula with a built-in primer option; rated for stucco and masonry surfaces
- Graco Magnum X5 airless paint sprayer — handles undiluted exterior latex and covers textured stucco walls faster than rolling; supports hose extensions for two-story reach
- Werner D1224-2 24-foot aluminum extension ladder — reaches 18-foot eave lines with safe overlap; Type IA rated at 300 lb
FAQ
How many gallons do I need to paint a 2,200 sqft two-story stucco house?
Plan on 22 gallons of body paint for two coats on a typical two-story stucco home with a 190-foot perimeter, 3 doors, and 16 windows. Stucco's rough texture requires a 1.2 siding factor, which adds roughly 3.5 gallons compared to painting smooth siding.
Why does stucco require more paint than smooth siding?
Stucco has a porous, irregular surface with significantly more actual surface area than its flat measurements suggest. A 1.2 siding factor accounts for the extra paint absorbed into the texture. Smooth or primed siding uses a 1.0 factor; vinyl siding typically uses 1.1.
How much primer do I need before painting stucco?
For one coat of primer on 3,117 square feet of paintable wall area, you need approximately 9 gallons. If the stucco is new, unpainted, or you're making a dramatic color change, primer is not optional—skip it and your topcoat coverage and adhesion will suffer.
How many quarts of trim paint do I need?
With a 190-foot perimeter, the calculator estimates 7 quarts of trim paint. That covers window casings, door frames, corner boards, and fascia at roughly one quart per 30 linear feet of trim run.
What coverage rate does this calculator use?
The calculator uses 350 square feet per gallon, which is the mid-range coverage figure most major paint manufacturers publish for exterior latex paints on prepared surfaces. Heavily textured or porous surfaces will reduce real-world coverage, which is why the siding factor is applied before dividing.
Should I add a waste factor on top of the 22-gallon estimate?
A 10% waste buffer is reasonable for most jobs—that brings you to about 24 gallons. Add overspray losses if you're using an airless sprayer, which can waste 15–20% more than brush or roller application.
Does the calculator include paint for the soffits and eaves?
No. The formula covers vertical wall area only. Soffits, eaves, and porch ceilings are typically painted separately and usually require 1–2 additional gallons depending on overhang depth.
How is the paintable wall area calculated?
The calculator multiplies perimeter by wall height to get gross wall area, then subtracts 21 square feet per door and 15 square feet per window. For this house that's (190 × 18) − (3 × 21) − (16 × 15) = 3,117 square feet.
What if I'm only doing one coat?
One coat on stucco is rarely enough for full, uniform coverage—especially over bare, patched, or color-changing surfaces. If you do go single-coat, divide the two-coat estimate in half: roughly 11 gallons. Factor in that thin coverage over stucco often looks uneven once dry.
Is 5-gallon bucket pricing worth it for a job this size?
Yes. At 22+ gallons you'll buy at least four 5-gallon buckets. The per-gallon price on a 5-gallon unit is typically 10–15% lower than buying individual gallons, and using a single bucket per color reduces batch-to-batch color variation.
Can I use interior paint on exterior stucco to save money?
No. Interior paints lack the UV inhibitors, mildewcides, and film flexibility that exterior paints require. Stucco expands and contracts with temperature swings; interior paint will crack and peel within one season.