Room Paint Calculator
Calculate the exact amount of paint needed for your room painting project, including walls, ceilings, doors, and windows for accurate cost estimation.
Paint Calculation Results
Paint Breakdown:
Surface Breakdown:
Shopping List:
About
Our Room Paint Calculator helps homeowners, contractors, and DIY enthusiasts accurately estimate paint quantities needed for any painting project, ensuring you buy the right amount without waste or shortage.
Why Choose
Precise calculations considering room dimensions, paint coverage, multiple coats, doors, windows, and different surface types for accurate paint estimation and cost planning.
Features
Multiple room types, various paint types, coverage adjustments, cost estimation, surface-specific calculations, and shopping list generation for complete project planning.
Benefits
Save money by buying the exact paint amount needed, avoid multiple store trips, plan project costs accurately, and ensure professional results with proper paint coverage calculations.
Measure Your Space
Enter room dimensions including length, width, and height. Count doors and windows to ensure accurate surface area calculations.
Select Paint Details
Choose paint type, coverage rate, number of coats, and surfaces to paint. Include current paint prices for cost estimation.
Get Paint Requirements
Receive detailed breakdown of paint needed, total costs, and shopping recommendations with built-in waste allowance for touch-ups.
Frequently Asked Questions – Room Paint Calculator
Most quality paints cover 350-400 square feet per gallon on smooth surfaces. Textured surfaces like stucco may only achieve 250-300 sq ft per gallon. Primer typically covers 300-350 sq ft per gallon. Always check the manufacturer’s specifications on the paint can for exact coverage rates.
Two coats are recommended for most painting projects to ensure even coverage, color uniformity, and durability. Dark colors over light may need 3 coats. When using primer, one finish coat may be sufficient. Quality paint with good coverage may only need one coat over similar colors.
Yes, standard doors (21 sq ft) and windows (15 sq ft average) should be subtracted from wall area. However, keep the extra paint for touch-ups, trim work, and future maintenance. Don’t subtract small openings like electrical outlets or switches.
Extra paint (typically 10-15%) accounts for application waste, touch-ups, future repairs, and variations in surface absorption. Textured surfaces, inexperienced application, and spray painting typically require more paint than brush or roller application.
Surface texture (smooth vs. textured), paint quality, application method, existing color, surface porosity, and environmental conditions all affect coverage. Porous surfaces like unpainted drywall, brick, or wood may require 20-30% more paint than smooth, previously painted surfaces.