Home
Back
Exterior Paint Coverage Formula:
The Exterior Paint Coverage Calculator estimates the total surface area that can be painted based on the number of gallons and the coverage rate per gallon. This helps in planning paint purchases and ensuring adequate coverage for exterior painting projects.
The calculator uses the paint coverage formula:
Where:
Explanation: The formula multiplies the quantity of paint by its coverage capacity to determine the total surface area that can be covered.
Details: Accurate paint coverage calculation is essential for budgeting, avoiding waste, and ensuring complete coverage of exterior surfaces. It helps prevent running out of paint mid-project or purchasing excess paint.
Tips: Enter the number of gallons and the coverage rate (typically provided on paint can labels). Both values must be positive numbers. Standard coverage rates range from 250-400 sq ft per gallon depending on paint type and surface texture.
Q1: What is a typical coverage rate for exterior paint?
A: Most exterior paints cover 250-400 square feet per gallon, but this varies by paint quality, surface texture, and application method.
Q2: Should I account for multiple coats?
A: Yes, multiply your total coverage by the number of coats needed. Most exterior projects require 2 coats for proper coverage and durability.
Q3: How does surface texture affect coverage?
A: Rough or porous surfaces (like stucco or brick) require more paint than smooth surfaces. Reduce the coverage rate by 10-25% for textured surfaces.
Q4: What about windows, doors, and trim?
A: Subtract these areas from your total surface calculation, or calculate them separately as they may require different paint types and coverage rates.
Q5: How much extra paint should I buy for touch-ups?
A: It's recommended to purchase 10-15% extra paint for future touch-ups and color matching purposes.