How many square feet is a 12×12 room?

A 12×12 room is 144 square feet (12 × 12 = 144). Other common sizes: 10×10 = 100 sq ft, 12×14 = 168 sq ft, 14×16 = 224 sq ft, 20×20 = 400 sq ft.

How do I convert square feet to square meters?

Multiply square feet by 0.0929. For example, 500 sq ft × 0.0929 = 46.45 sq m. To go the other way, multiply square meters by 10.764.

Square Footage Calculator: Rooms, L-Shapes & Flooring Cost

Practical Use Cases

Flooring estimate: Enter each room's dimensions, add 10% waste factor cost — instantly know how many boxes of hardwood or tile to order.
Home search: Convert the listing's square footage to square meters (or vice versa) to compare homes across different listing formats.
Rental listing: Sum all habitable rooms to get the gross living area figure for your listing description.
Renovation bid: Enter dimensions and cost-per-sq-ft labor rates to get a ballpark project budget before calling contractors.

Frequently Asked Questions

How do you calculate square footage?

For rectangular rooms, multiply length × width. A 12 ft × 10 ft room equals 120 sq ft. For irregular shapes, break into rectangles, calculate each, then sum.

How many sq ft is a 12×12 room?

144 square feet. Other common sizes: 10×10 = 100, 12×14 = 168, 14×16 = 224, 20×20 = 400 sq ft.

How do I measure an L-shaped or irregular room?

Break the room into rectangles by drawing a line at the inside corner, calculate each rectangle separately, then add. Use the "Add Room" button above to input each piece as its own row.

How do I convert sq ft to sq m?

Multiply square feet by 0.0929. 500 sq ft = 46.45 sq m. To convert the other way, multiply square meters by 10.764.

How much extra material should I order for waste?

10% for straight-laid tile or flooring, 15% for diagonal installations, 20% for patterned layouts like herringbone or chevron. Always round up to complete boxes.

Does square footage include closets, hallways, or garages?

For real estate (ANSI Z765 standard), gross living area counts finished heated spaces—hallways and interior closets yes, garages and unfinished basements no. For flooring estimates, only measure rooms you are actually covering.

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