Paint Coverage Formula:
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Definition: This calculator estimates the amount of latex paint needed based on the area to be painted and the paint's coverage rate.
Purpose: It helps homeowners, painters, and contractors determine how much paint to purchase for a project.
The calculator uses the formula:
Where:
Explanation: The total area is divided by the coverage rate to determine how many gallons of paint are needed.
Details: Accurate paint estimation prevents over-purchasing (waste) or under-purchasing (project delays), and ensures consistent color application.
Tips: Enter the area to be painted in square feet and the paint coverage rate (default 350 sq ft/gallon). All values must be > 0.
Q1: What's a typical coverage rate for latex paint?
A: Most latex paints cover 250-400 sq ft per gallon, with 350 being a common average.
Q2: Should I account for multiple coats?
A: Yes, multiply the result by the number of coats needed (typically 2 for good coverage).
Q3: How do I calculate the area to be painted?
A: Measure wall length × height, subtract windows/doors (length × width), and sum all surfaces.
Q4: Does this include primer?
A: No, primer coverage should be calculated separately as it often has different coverage rates.
Q5: How much extra paint should I buy?
A: Consider adding 10% to the calculated amount for touch-ups and waste.