Paint Calculator
Estimate gallons before you buy. Enter your room dimensions, subtract doors and windows, choose the number of coats, and get a practical paint and budget range for interior walls.
Quick answer: one gallon usually covers about 350 sq ft per coat, but textured walls, dark color changes, and extra coats can push the real number higher.
Room Dimensions
Enter your room dimensions and click Calculate to get your paint estimate.
Quick Tips
- - Always buy 10% more paint than estimated for touch-ups
- - Dark-to-light color changes may need an extra coat
- - Textured walls use 15-25% more paint
- - Store leftover paint for future touch-ups
Best For / Avoid If
| Use it for | Avoid if | Next step |
|---|---|---|
| Estimating walls before buying paint | You need exterior siding or whole-house material takeoffs | Compare interior paints |
| Choosing roller covers and tray setup | You plan to spray cabinets or fences instead | Pick a paint roller |
| Adjusting for wall texture and extra coats | You already know exact manufacturer coverage for your paint | Match roller nap to texture |