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Paint Calculation Formula:
The Whole House Paint Calculator estimates the amount of paint needed to cover the entire exterior or interior of a house based on total surface area, paint coverage rate, and number of coats required.
The calculator uses the paint calculation formula:
Where:
Explanation: The formula calculates the total paint needed by dividing the total area by the coverage rate per gallon, then multiplying by the number of coats for complete coverage.
Details: Accurate paint estimation helps avoid wastage, ensures you purchase the right amount of paint, saves money, and prevents project delays due to insufficient materials.
Tips: Measure total paintable area accurately, check the paint can for coverage specifications, and consider the surface type and condition when determining number of coats needed.
Q1: How do I calculate total paintable area?
A: Measure length and height of each wall, then sum all areas. Subtract areas for windows and doors (typically 20 square feet per window/door).
Q2: What is typical paint coverage?
A: Most quality paints cover 250-400 square feet per gallon. Check the specific product label for accurate coverage rates.
Q3: How many coats are usually needed?
A: Most projects require 2 coats for optimal coverage and durability. Dark colors or porous surfaces may require additional coats.
Q4: Should I buy extra paint?
A: Yes, purchase 10-15% extra for touch-ups and future repairs. Different paint batches may have slight color variations.
Q5: Does surface texture affect coverage?
A: Yes, rough or textured surfaces require more paint than smooth surfaces. Adjust your calculations accordingly.