Paint Project Calculator
Calculate the exact amount of paint needed for your room, including walls, ceiling, and trim. Get detailed cost estimates and supply recommendations.
Room Dimensions
Enter the dimensions of your room
Areas to Exclude
Subtract the area of doors and windows for a more accurate wall paint estimate.
door
window
Paint & Surface Details
Configure paint coverage and number of coats
Cost Estimation
Enter paint prices for cost calculations (optional)
Paint Requirements
0 Gallons
Total Paint Needed
Walls0 Gallons
Ceiling0 Gallons
Trim0 Gallons
Wall Area: 0 sq ft
Ceiling Area: 0 sq ft
Excluded Area: 0 sq ft
Paintable Wall Area: 0 sq ft
How to Use This Calculator
- Enter your room dimensions accurately
- Add all doors and windows to exclude their area
- Adjust paint coverage based on your paint specifications
- Select the number of coats for each surface
- Include primer if painting over dark colors or new surfaces
- Enter paint prices for cost estimation
Professional Painting Tips
- • Always paint from top to bottom (ceiling, walls, then trim)
- • Use high-quality painter's tape for clean lines
- • Prime all surfaces when changing from dark to light colors
- • Buy 10-15% extra paint for touch-ups and future repairs
- • Use a quality brush for trim and roller for large surfaces
- • Remove tape while paint is still slightly wet
Understanding Paint Finishes
Matte/Flat: Best for ceilings and low-traffic areas. Hides imperfections well.
Eggshell: Slight sheen, good for living rooms and bedrooms. Easy to clean.
Satin: Durable finish for high-traffic areas like hallways and kids' rooms.
Semi-gloss: Best for trim, doors, and bathrooms. Very durable and washable.