Paint Calculator
Calculate paint quantities, coverage, costs, and project planning for interior, exterior, and specialty painting projects. Perfect for homeowners, contractors, and DIY enthusiasts planning painting work.
Paint Coverage Calculator
Quick Project Calculations
Paint Selection & Application Guide
Choosing the right paint and applying it correctly ensures a beautiful, long-lasting finish. Understanding paint types, coverage rates, and application techniques helps achieve professional results.
Paint Types & Applications
Latex/Acrylic Paint
Water-based, easy cleanup, low odor, quick drying
Oil-Based Paint
Durable finish, smooth application, longer drying time
Specialty Paints
Textured, metallic, chalkboard, magnetic paints
Primer
Seals surface, improves adhesion, blocks stains
Coverage Rates by Surface
| Surface Type | Coverage (sq ft/gal) | Coats Needed | Primer Required |
|---|---|---|---|
| Smooth Drywall | 400 | 2 | Sometimes |
| Textured Walls | 300 | 2 | Yes |
| Wood Siding | 250 | 2-3 | Yes |
| Brick/Masonry | 200 | 2-3 | Yes |
| Metal Surfaces | 350 | 2 | Always |
Paint Finish Guide
- Flat/Matte: No shine, hides imperfections, difficult to clean
- Eggshell: Low sheen, easy to clean, good for living areas
- Satin: Soft sheen, durable, ideal for high-traffic areas
- Semi-Gloss: Shiny finish, very durable, easy to clean
- Gloss: High shine, extremely durable, shows imperfections
Application Best Practices
Surface Preparation
- • Clean all surfaces thoroughly
- • Fill holes and cracks
- • Sand rough areas smooth
- • Apply primer when needed
Application Technique
- • Use quality brushes/rollers
- • Apply thin, even coats
- • Maintain wet edge
- • Allow proper drying time
Environmental Factors
- • Temperature: 50-85°F
- • Humidity: 40-70%
- • Avoid direct sunlight
- • Ensure good ventilation
Quality Control
- • Check coverage uniformity
- • Touch up as needed
- • Remove tape while wet
- • Clean tools immediately
Color Selection Tips
Lighting Considerations
- • Test colors in different lighting conditions
- • North-facing rooms: Use warm colors
- • South-facing rooms: Cool colors work well
- • Consider artificial lighting effects
Room Size & Function
- • Light colors make rooms appear larger
- • Dark colors create cozy, intimate spaces
- • Consider room's primary function
- • Account for existing furniture/decor
Pro Tip
Always buy slightly more paint than calculated to account for touch-ups and future repairs. Keep detailed records of paint colors and brands for easy matching later.
Paint Calculator Answers
What does the paint calculator do?
The paint calculator estimates how much paint you need for a room or surface based on dimensions like length, width, height, number of coats, and doors/windows.
Does it account for windows and doors?
Yes. You can input the number of doors and windows, and the calculator will subtract their surface area to give a more accurate paint estimate.
How is paint coverage calculated?
Paint coverage is typically based on square footage per gallon (e.g., 350 sq ft per gallon). You can adjust the coverage rate based on the paint brand or surface type.
Can I calculate paint for multiple rooms?
Yes. Just calculate each room separately and add the results together, or use a calculator that allows multiple room inputs for a combined total.