Paint Coverage Calculator
Calculate paint and primer requirements for interior and exterior projects
Calculate Paint Coverage
Room Dimensions
Paint Specifications
How to Use the Paint Calculator
Getting Started
- Choose Paint Type: Select interior or exterior paint
- Measure Room: Enter length, width, and height dimensions
- Count Openings: Include doors and windows to subtract from wall area
- Set Coverage: Typical coverage is 350-400 sq ft per gallon
Paint Coverage Guidelines
- Premium Paint: 400+ sq ft per gallon
- Standard Paint: 350-400 sq ft per gallon
- Budget Paint: 300-350 sq ft per gallon
- Textured Surfaces: Reduce coverage by 10-20%
Professional Tips
- Primer Required: Always use primer on new drywall or dramatic color changes
- Two Coats Minimum: Most projects require 2 coats for even coverage
- Buy Extra: Purchase 10% extra paint for touch-ups and future repairs
- Quality Matters: Higher quality paint often covers better and lasts longer
Frequently Asked Questions
How much paint do I need for a 12×10 room?
For a 12×10 room with 9-foot ceilings, you'll need approximately 1-2 gallons of paint for walls, depending on doors, windows, and number of coats.
Do I need primer for every paint job?
Primer is essential for new drywall, dramatic color changes, or switching paint types. Many modern paints include primer, but separate primer often provides better results.
How do I calculate paint for ceilings?
For ceilings, multiply length × width to get square footage. Ceilings typically require one coat if using quality ceiling paint.
What's the difference between interior and exterior paint?
Exterior paint is formulated to withstand weather, UV rays, and temperature changes. It's more durable but not suitable for interior use due to VOCs.
How long does paint last in storage?
Unopened paint lasts 2-10 years depending on type. Latex paint lasts longer than oil-based. Store in cool, dry conditions and stir before use.
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- Roofing Calculator - Complete exterior renovation planning
- Concrete Volume Calculator - Foundation work before painting
- Staircase Calculator - Plan stairs that need painting