Quick Paint Can Reference for Popular Room Sizes (2 Coats)
The table below lists standard residential room sizes with 9-foot ceilings, assuming two full topcoats on smooth drywall with typical door and window openings deducted.
| Room Type & Footprint | Wall Area (2 Coats) | Exact Gallons | Cans to Buy | Ceiling Paint (1 Coat) | Primer (New Walls) |
|---|---|---|---|---|---|
| Half Bath (6 × 8 ft) | 372 sq ft | 1.06 gal | 2 Gallons (or 1G + 1Q) | 1 Quart | 1 Gallon |
| Small Bedroom (10 × 12 ft) | 648 sq ft | 1.85 gal | 2 Gallons | 1 Gallon | 1 Gallon |
| Primary Bedroom (14 × 16 ft) | 936 sq ft | 2.67 gal | 3 Gallons | 1 Gallon | 2 Gallons |
| Living Room (16 × 20 ft) | 1,152 sq ft | 3.29 gal | 4 Gallons | 1 Gallon | 2 Gallons |
| Open Great Room (20 × 26 ft, 10' h) | 1,640 sq ft | 4.69 gal | 1 Five-Gallon Pail | 2 Gallons | 1 Pail (5G) |
Paint Sheens Explained: Choosing the Right Finish for Each Room
Paint sheen defines both the visual light reflectivity and the cleanability of your walls. Higher resin sheen resists moisture and scrubbing, while matte sheens hide wall bumps and drywall tape ridges:
Best For: Ceilings, formal dining rooms, master bedrooms with zero traffic.
Completely non-reflective. Hides surface drywall imperfections better than any sheen, but burnishes (leaves shiny marks) when scrubbed.
Best For: Living rooms, guest bedrooms, home offices.
The undisputed king of residential wall finishes. Soft velvety appearance with moderate scrub resistance for everyday family living.
Best For: Hallways, kids' bedrooms, kitchens, mudrooms.
Silky smooth finish with enhanced washability against sticky fingerprints and pet scuffs. Reveals slightly more taping imperfections.
Best For: Bathrooms, laundry rooms, baseboards, doors, window casings.
Hard, moisture-resistant acrylic film that wipes clean easily with a damp sponge. Resists shower steam and humidity without peeling.
"Paint + Primer in One" vs Dedicated Primer: The Contractor Reality
Paint store marketing heavily pushes "Self-Priming Paint & Primer in One." While fine for repainting a beige wall to a light gray, it is NOT true primer. You must use a dedicated specialty primer in these four situations:
Roller Nap Thickness: Matching Sleeve to Surface
Using the wrong roller cover nap causes either excessive splattering or an uneven orange-peel stipple:
For cabinet doors, metal trim, and ultra-smooth doors. Delivers a spray-like glass finish with zero stipple.
The standard sleeve for 90% of residential drywall walls. Holds ample paint without dripping and produces a microscopic, uniform eggshell texture.
Required for textured orange peel, knockdown ceilings, stucco, and rough masonry block to force paint into deep crevices.