Home Square Footage and Cost Estimator

Add up your home's square footage room by room, see a simple floor plan and estimate paint and flooring costs.

Questions this answers

  • How many square feet is my home?
  • How much paint do I need for a room?
  • How much will new flooring cost?
  • How do I measure an L-shaped room?
  • How does my home compare with the average size?
Calculator Learn FAQs

Your Rooms

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Results Summary

Total Area0sq ft
Total Rooms0rooms
Avg Room Size0sq ft
vs. Average Home enter rooms to compare

Visual Floor Plan

Size Breakdown Charts

Area by Room

% of Total

Paint Estimator

RoomWall AreaGallonsCost
Add rooms to see paint estimates.

Flooring Estimator

RoomType$/sqftAreaw/ WasteCost
Add rooms to see flooring estimates.

Room-by-Room Breakdown

RoomShapeDimensionsArea%
Add a room to see results.
This calculator is for educational and informational purposes only. Results are estimates based on the inputs you provide and should not be taken as professional advice. Always consult a qualified professional for decisions involving real estate, construction, or financial matters.

Where to go next

QuizHow Much Do You Know About Measuring a Home?8 questions, 4 minLearnAll 1 guides, videos and quizzesFAQs5 common questions, answered

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Frequently asked questions

How do I measure the square footage of a room?

Measure the length and width in feet and multiply them. A 12 by 14 foot room is 168 square feet. For L-shaped rooms, split the room into two rectangles, measure each and add them, or use the L-shape option to subtract the cutout.

How much paint do I need?

A gallon of paint covers roughly 350 to 400 square feet per coat. Wall area is the room perimeter times the wall height, minus large windows and doors. Most rooms need two coats, so double the area before dividing by coverage.

How much extra flooring should I buy?

Buy about 5% to 10% more than the floor area for cuts and waste, and closer to 15% for diagonal layouts or patterned tile. Keeping a spare box from the same lot also helps with future repairs.

Does square footage include garages and basements?

In listings, finished living area usually excludes garages and unfinished basements. Add them here if you are estimating paint or flooring for those spaces, but leave them out when you compare your home with average living area.

Can I save my rooms?

Yes. Save keeps your rooms and settings in this browser on this device, with no account needed.

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