Home
Back
Wall Area Formula:
The Wall Area Calculator helps determine the actual paintable surface area of a wall by subtracting openings (windows, doors) from the total wall area. This is essential for accurate paint quantity estimation and project planning.
The calculator uses the wall area formula:
Where:
Explanation: The formula calculates the total wall surface and subtracts areas that don't require painting, giving you the actual paintable surface area.
Details: Accurate wall area calculation ensures you purchase the right amount of paint, avoid waste, and budget correctly for your painting project. It also helps in estimating labor time and costs.
Tips: Measure wall length and height in feet. Calculate opening areas by multiplying width × height for each opening and sum them. Enter all values as positive numbers.
Q1: How do I measure openings accurately?
A: Measure each window and door separately (width × height) and sum all areas. Include trim if it won't be painted.
Q2: Should I include baseboards and crown molding?
A: Only include areas you plan to paint. If molding will be painted separately, exclude it from wall measurements.
Q3: What about textured walls?
A: Textured surfaces may require more paint. Consider adding 10-15% to your calculated area for textured walls.
Q4: How much paint do I need per square foot?
A: Typically, 1 gallon covers 350-400 square feet for one coat. Check paint can specifications for exact coverage.
Q5: Should I account for multiple coats?
A: Yes, multiply your final paintable area by the number of coats needed to determine total paint requirements.