PaintCoverageCalc
Paint Coverage Calculator
The Paint Coverage Calculator estimates how much paint you need for your project. Accurate calculations prevent waste and ensure you purchase the right amount of paint for walls, ceilings, trim, and furniture. Save money by avoiding over-purchasing or multiple store trips.
Key Features
Square footage calculation
Paint application rate adjustment
Multi-coat coverage estimation
Surface type consideration
Brand paint coverage support
Cost projection
Paint Coverage Calc
Measure Surface Area
Measure wall length and height, then multiply to get square footage. Include all surfaces you plan to paint.
Account for Windows and Doors
Subtract the area of windows, doors, and openings from your total surface area.
Enter Paint Coverage Rate
Input the square feet per gallon from your paint can label (typically 300-400 sq ft/gallon).
Specify Number of Coats
Enter 1 for primer-painted surfaces or 2 for dramatic color changes or dark-to-light painting.
Select Surface Type
Choose drywall, wood, exterior, or other surface types to adjust absorption rates.
Review Gallon Requirements
See the recommended quantity and cost estimate to purchase with confidence.
Use Cases
Interior wall painting
Ceiling renovation
Exterior house painting
Trim and accent work
Furniture refinishing
Commercial space painting
Frequently Asked Questions
How much paint do I need for one gallon coverage?
Most interior paints cover 300-400 square feet per gallon. Check your specific paint can for exact coverage rates.
Should I buy extra paint?
Yes, buy 10-15% extra for touch-ups and to account for application variation. Paint lot numbers can vary slightly in color.
Do I need primer and paint?
For most repaints, primer is optional. For new drywall, wood, or dramatic color changes, primer is recommended.
How does surface type affect coverage?
Rough or porous surfaces absorb more paint and require more coverage. Smooth, sealed surfaces need less paint.
Is two coats always necessary?
Two coats are recommended for color coverage and durability. One coat may suffice if you are using primer or painting over similar colors.
Tool Information
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