1. What is Wall Square Footage?

Wall square footage is the total paintable area of walls in a room or building, calculated by multiplying perimeter by height and subtracting areas not to be painted (like doors and windows).

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{perimeter} \) — Total length of all walls (feet)
• \( \text{height} \) — Wall height (feet)
• \( \text{doors} \) — Total area of doors (square feet)
• \( \text{windows} \) — Total area of windows (square feet)

Explanation: This calculation gives the actual paintable surface area needed for accurate paint quantity estimation.

3. Importance of Accurate Calculation

Details: Proper wall square footage calculation ensures you purchase the right amount of paint, avoiding waste or shortage during painting projects.

4. Using the Calculator

Tips: Measure the total length of all walls (perimeter) and wall height. For doors/windows, either measure each or use standard sizes (e.g., 21 sq ft per door, 12 sq ft per window).

5. Frequently Asked Questions (FAQ)

Q1: How do I measure perimeter?
A: Add the length of all walls together. For rectangular rooms: 2 × (length + width).

Q2: Should I subtract baseboards/crown molding?
A: Only if you're not painting them. Typically these are included in wall area.

Q3: How much paint per square foot?
A: Typically 1 gallon covers 350-400 sq ft for one coat, but check paint can instructions.

Q4: What about textured walls?
A: Textured surfaces may require 10-20% more paint than smooth walls.

Q5: How accurate should measurements be?
A: For small rooms, measure to the nearest inch. For large projects, nearest foot is usually sufficient.