# Paint Coverage, Coats & Sheens
Learn how many gallons of paint you need and how to choose the right finish.
Interior latex paint covers about 350–400 sq ft per gallon, per coat, on smooth walls. Rough surfaces may reduce coverage to 200–250 sq ft per gallon. Plan for two coats on almost every job, and use primer on new drywall, bare wood, stains, and dark-to-light color changes.
How do I calculate how much paint I need?
Sheen affects durability and how well paint hides imperfections. Flat or matte paint conceals flaws but scuffs easily. Eggshell and satin are standard choices for walls, while semi-gloss and gloss suit trim, doors, and wet areas.
What is paint used for?
- Interior walls and ceilings
- Trim, doors, and cabinets
- Exterior siding and stucco
- Concrete floors and porches
Which types of paint are there?
What else do people ask about paint?
How much paint for a 12x12 room?
About 1.5 gallons for walls (2 coats) plus 0.5 gallon for ceiling.
Do I need primer?
Yes for new drywall, bare wood, or dark-to-light color changes. Self-priming paint is fine repainting the same color family.
How long between coats?
2–4 hours for latex, 24 hours for oil-based. Check the can — humidity slows drying.