Paint Calculator

To calculate paint needed:

• Measure room length, width, and ceiling height
• Calculate total wall area: perimeter x height
• Subtract doors (~20 sq ft each) and windows (~15 sq ft each)
• Divide by paint coverage (typically 350 sq ft/gallon)
• Multiply by number of coats (usually 2)

The number of coats depends on several factors:

• 1 coat: Touch-ups or same-color repaints with primer
• 2 coats: Most standard paint jobs, especially when changing colors
• 3 coats: Covering dark colors, dramatic color changes, or for extra durability

Paint coverage rate indicates how much area one gallon covers:

• 350 sq ft: Standard interior latex paint
• 300-400 sq ft: Typical range for quality paints
• Lower coverage: Textured walls or porous surfaces
• Higher coverage: Smooth walls with primer

Check your paint can for specific coverage information.

Yes, it is recommended to purchase 10-15% extra paint:

• Account for touch-ups and repairs later
• Cover unexpected areas or mistakes
• Textured walls may require more paint
• Same batch ensures color consistency

Store leftover paint properly for future touch-ups.