Paint gallons by room size
| Room size | Wall area | 1 coat | 2 coats |
|---|---|---|---|
| 8 × 10 ft | 288 ft² | 0.82 gal | 1.65 gal |
| 10 × 10 ft | 320 ft² | 0.91 gal | 1.83 gal |
| 10 × 12 ft | 352 ft² | 1.01 gal | 2.01 gal |
| 12 × 12 ft | 384 ft² | 1.10 gal | 2.19 gal |
| 12 × 14 ft | 416 ft² | 1.19 gal | 2.38 gal |
| 12 × 16 ft | 448 ft² | 1.28 gal | 2.56 gal |
| 14 × 16 ft | 480 ft² | 1.37 gal | 2.74 gal |
| 15 × 20 ft | 560 ft² | 1.60 gal | 3.20 gal |
| 20 × 20 ft | 640 ft² | 1.83 gal | 3.66 gal |
Table values are theoretical coverage before openings, waste or touch-up allowance. Actual paint coverage varies by product, surface texture, color change and application.
Example: 12 × 12 room
A 12 × 12 ft room with 8 ft walls has 384 ft² of gross wall area. At 350 ft² per gallon, one coat requires about 1.10 gallons before deducting openings. Two coats require about 2.19 gallons.
Calculate the actual room
Enter room dimensions, doors, windows, coats, product coverage and touch-up allowance.
Open Paint Calculator →Why the can count can exceed the exact gallons
Paint is purchased in fixed container sizes. A calculated requirement of 2.2 gallons cannot normally be purchased as exactly 2.2 gallons, so your shopping quantity must account for available can sizes and any paint you want to retain for future touch-ups.
For drywall and wallpaper quantities, visit the Walls & Finishes Planning Hub.