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Paint Calculation Formula:
The Exterior House Paint Calculator estimates the amount of paint needed to cover the exterior of a house based on the surface area, paint coverage rate, and number of coats required. This helps homeowners and contractors accurately plan paint purchases and avoid waste.
The calculator uses the paint calculation formula:
Where:
Explanation: The formula calculates the total paint volume needed by dividing the house area by the coverage rate per gallon, then multiplying by the number of coats.
Details: Accurate paint calculation prevents over-purchasing (saving money) and under-purchasing (avoiding project delays). It also ensures consistent color matching and proper surface protection.
Tips: Measure the exterior surface area accurately, check the paint can for coverage rate specifications, and determine the number of coats needed based on surface condition and desired finish.
Q1: How do I measure house exterior area?
A: Calculate the perimeter of the house multiplied by the height, then subtract window and door areas. For complex shapes, break into rectangles and triangles.
Q2: What is a typical paint coverage rate?
A: Most quality exterior paints cover 250-400 square feet per gallon, but check the specific product label as coverage varies by paint type and surface texture.
Q3: How many coats are usually needed?
A: Most exterior projects require 2 coats for proper coverage and durability. Dark colors over light may need additional coats.
Q4: Should I buy extra paint for touch-ups?
A: Yes, it's recommended to purchase 10-15% extra paint for future touch-ups and to account for surface texture variations.
Q5: Does surface texture affect coverage?
A: Yes, rough surfaces like stucco or brick require more paint than smooth surfaces like siding. Adjust coverage rate accordingly.