Calculate the exact amount of paint needed for walls, ceilings, and trim.
Enter your room dimensions and paint specifications to calculate gallons needed.
Measure the length, width, and height of your room using a tape measure. Record measurements in feet or meters.
Count the number of standard doors (3ft × 7ft) and windows (3ft × 4ft) to subtract from wall area.
Choose your paint type (latex, oil-based, primer) which determines coverage per gallon.
Select number of coats and enter trim measurements for accurate calculations.
Include a waste factor (typically 10-15%) for touch-ups and spillage.
Click "Calculate Paint Needs" to get your results in gallons, quarts, and cost estimate.
| Paint Type | Coverage (sq ft per gallon) | Notes |
|---|---|---|
| Latex/Water-based | 350-400 | Most common for interior walls |
| Oil-based | 300-350 | Better durability, longer drying |
| Primer | 250-300 | Higher absorption on raw surfaces |
| High-build/Textured | 200-250 | Thicker application for texture |
| Exterior Paint | 250-350 | Varies by surface texture |
12' × 14' × 8' room with 1 door, 2 windows
10' × 12' × 8' room with cabinets
15' × 20' × 9' room with large windows