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Paint Coverage Formula:
Paint wall coverage refers to the total surface area that a given amount of paint can cover. It's calculated by multiplying the number of gallons by the coverage rate per gallon, which varies depending on the paint type, surface texture, and application method.
The calculator uses the paint coverage formula:
Where:
Explanation: This simple multiplication gives you the total square footage that your paint supply will cover based on the manufacturer's specified coverage rate.
Details: Accurate coverage calculation helps in budgeting for paint projects, prevents over-purchasing or under-purchasing paint, and ensures you have enough material to complete your painting project without interruptions.
Tips: Enter the number of gallons you plan to use and the coverage rate specified on the paint can (typically 250-400 sq ft/gallon). Both values must be positive numbers for accurate calculation.
Q1: What is a typical coverage rate for interior paint?
A: Most interior paints cover 300-400 square feet per gallon, but this can vary based on surface porosity and paint quality.
Q2: How does surface texture affect coverage?
A: Rough or textured surfaces require more paint than smooth surfaces - typically 10-20% more coverage area is needed.
Q3: Should I account for multiple coats?
A: Yes, multiply your total coverage area by the number of coats needed. Most projects require 2 coats for proper coverage.
Q4: How do I calculate coverage for different colors?
A: Dark colors may require more coats for full coverage. When changing from dark to light colors, plan for an extra coat or primer.
Q5: What factors can reduce actual coverage?
A: Application method (brush vs roller), surface absorption, paint thinning, and environmental conditions can all affect actual coverage.