Constructionpaint, home-improvement
How Much Paint Do I Need for a Room? Complete Calculator Guide
How Much Paint Do I Need for a Room? Complete Calculator Guide One gallon of paint covers approximately 350-400 square feet of wall space with one coat. For a standard 12x12 room with 8-foot ceilings, you'll need about 1.5 gallons for two coats after subtracting doors and windows. But the actual amount depends on your wall texture, paint type, and color change. A realistic multi-room project shows why the buffer matters: painting four bedrooms and a hallway totaling 1,860 square feet of wall space calculates to about 10 gallons with two coats, but knockdown texture in one room can eat through paint so fast it needs an extra gallon just for that room. A project this size runs about $480 in premium eggshell paint -- proof that textured walls can increase paint needs by 20-25% over the manufacturer's label estimate. Use our Paint Calculator(/construction/paint-calculator) to get an instant, accurate estimate...