Square Footage Calculator

Square Footage Formula:

\[ \text{Sq ft} = \text{Length} \times \text{Height} - \text{Openings} \]

Square Footage:

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Square Footage Calculation?

Square footage calculation measures the area of a wall or surface by multiplying its length by height, then subtracting any openings like windows or doors. It's essential for construction, painting, and material estimation.

2. How Does the Calculator Work?

The calculator uses the square footage formula:

\[ \text{Sq ft} = \text{Length} \times \text{Height} - \text{Openings} \]

Where:

\( Length \) — Wall length in feet
\( Height \) — Wall height in feet
\( Openings \) — Total area of windows/doors in square feet

Explanation: The formula calculates the total wall area then subtracts non-paintable/non-covered areas.

3. Importance of Square Footage Calculation

Details: Accurate square footage is crucial for purchasing materials (paint, wallpaper, siding), estimating costs, and planning construction projects.

4. Using the Calculator

Tips: Measure length and height in feet. For openings, either calculate each opening's area (length × height) and sum them, or use 0 if there are no openings.

5. Frequently Asked Questions (FAQ)

Q1: How do I measure irregular walls?
A: Break them into rectangular sections, calculate each separately, then sum the results.

Q2: Should I include baseboards/crown molding?
A: Typically no, as these are calculated separately. Include only the main wall surface.

Q3: How accurate should measurements be?
A: For most purposes, measurements to the nearest 1/4 foot are sufficient.

Q4: What about sloped ceilings?
A: Use the average height (highest point + lowest point divided by 2).

Q5: How much extra should I add for waste?
A: For materials like paint or tiles, add 10-15% to the total square footage.