House Floor Area Calculator
Calculate the total square footage of your home by adding up individual room areas.
Total Floor Area
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Why Calculate House Floor Area?
Knowing the accurate square footage of your home is essential for a variety of reasons. For homeowners, it's crucial for planning renovations, ordering the correct amount of flooring or paint, and even for furniture placement. For real estate purposes, the Gross Living Area (GLA) is a key factor in determining a property's value and is a standard metric on property listings. Our calculator makes it easy to get a precise total.
How Our Calculator Works
Add Your Rooms
Start with the first room and use the "Add Another Room" button to create entries for each area you want to measure.
Enter Dimensions
For each room, enter its length and width in feet. The calculator automatically calculates the area for each room.
Get the Total Area
The tool instantly sums the areas of all your rooms to give you the total floor area of your house.
Measurement Pointers
Tips for Accurate Measurements
Measure Wall-to-Wall
For the most accurate results, measure the full length and width of a room from the surface of the walls.
Divide Complex Shapes
For L-shaped rooms, break them into two separate rectangles. Calculate each one and add them as separate "rooms".
Exclude Unfinished Areas
When calculating for real estate (GLA), do not include unfinished basements, garages, or three-season porches.
Double-Check Math
Always measure each dimension twice to ensure accuracy before entering the numbers into the calculator.
Frequently Asked Questions
What is the difference between living area and total area?
Living area (or Gross Living Area - GLA) typically includes finished, heated spaces above ground. Total area can include unfinished basements, garages, and enclosed porches.
How do you measure an L-shaped room?
The easiest way is to divide the 'L' into two separate rectangles. Measure the length and width of each rectangle, calculate their individual areas, and then add them together. You can add them as two separate "rooms" in our calculator.
Should I include my garage in the total floor area?
For your personal use (e.g., ordering flooring), yes. For official real estate listings, garages are typically excluded from the Gross Living Area (GLA) but are often mentioned separately.
How are staircases accounted for in floor area calculations?
Generally, the area of the staircase is included in the square footage of the floor it descends from. You can approximate this by measuring its length and width as if it were a solid floor area.
Do closets count towards the total square footage?
Yes, closets are almost always included in the total square footage calculation of a room and the overall Gross Living Area.
Why is accurate floor area important for real estate?
Square footage is one of the most significant factors in determining a home's market value. Inaccurate measurements can lead to incorrect pricing and potential disputes during a sale.
Should I measure from the interior or exterior walls?
For most purposes, like ordering flooring, you should measure the interior "wall-to-wall" dimensions of each room. For official real estate GLA, appraisers often use exterior measurements and make adjustments.
What Our Users Are Saying
"This calculator was perfect for planning our new flooring. The ability to add multiple rooms made it so much easier than doing it by hand."
- Ethan Harris
"As a real estate agent, I use this tool for quick estimates for my clients. It's incredibly handy and the interface is clean and professional."
- Chloe Evans
"Simple and effective. The 'add room' feature is genius. I was able to calculate my whole house in minutes. Highly recommend!"
- Liam O'Connor
"A great starting point for my renovation budget. It would be cool if you could subtract areas for things like kitchen islands."
- Olivia Fischer
"The remove room button is a small but very welcome feature! I made a few mistakes and it was easy to correct them without starting over."
- Noah Tremblay
"I used this to double-check the square footage on a real estate listing. It gave me the confidence that the listing was accurate. Very useful."
- Isabella Dubois
"Clean, simple, and does exactly what it needs to do. This calculator is now in my bookmarks for all future projects."
- Mason Wright
"It works well. The ability to name the rooms helped me stay organized while measuring my entire house."
- Harper Wagner
"A handy tool for anyone moving or renovating. It gave me a clear idea of my space, which helped a lot with furniture shopping."
- Logan Fischer
"This is the best floor area calculator I've found. The dynamic 'add room' feature is what sets it apart. Brilliant!"
- Evelyn Hayes
"Worked perfectly for my L-shaped living room by adding it as two separate sections. So much easier than doing the math on paper."
- Jackson Cole
"Good for a quick estimate. It would be nice to have a diagram to show how to measure L-shaped rooms, but the FAQs helped."
- Willow Ricci
"Fantastic resource for planning my paint purchase. Saved me from making multiple trips to the store. Thank you!"
- Arthur Sinclair
"Clean interface and very straightforward. The best part is that it updates the total in real-time as you type."
- Clara Oswald
"Good tool. I wish there was an option for metric units, but for feet, it works perfectly as described."
- Jasper Hale
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