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Wall Paint Coverage Formula:
Wall paint 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 paint type, surface texture, and application method.
The calculator uses the wall paint coverage formula:
Where:
Explanation: This simple multiplication gives you the total square footage that your paint supply will cover, helping you determine if you have enough paint for your project.
Details: Accurate paint coverage calculation ensures you purchase the right amount of paint, avoids waste, prevents project delays due to insufficient paint, and helps with budget planning for painting projects.
Tips: Enter the number of gallons you have or plan to purchase, and the coverage rate per gallon (typically found on paint can labels). Common coverage rates range from 250-400 square feet per gallon depending on paint quality and surface type.
Q1: What is a typical coverage rate for interior wall paint?
A: Most quality interior paints cover 300-400 square feet per gallon. Premium paints may cover slightly more area.
Q2: How does surface texture affect coverage?
A: Rough or textured surfaces require more paint than smooth surfaces, reducing the effective coverage rate by 10-20%.
Q3: Should I account for multiple coats?
A: Yes, for most painting projects, you'll need 2 coats. Multiply your calculated coverage by 0.5 to get the actual paintable area for 2-coat coverage.
Q4: How do I calculate the coverage rate if it's not listed?
A: If not specified, assume 350 sq ft/gallon for interior walls and 250-300 sq ft/gallon for exterior surfaces as a general guideline.
Q5: Does paint color affect coverage?
A: Dark colors may require more coats for full coverage, especially when painting over lighter colors, which can effectively reduce the coverage rate.