Bed Dimensions in Feet: Make Sure You Know Before You Buy


Twin

Twin size bed dimensions in feet are 3.17 feet wide by 6.25 feet long and they have 19.6 square feet. With an eight-inch high mattress, they have 13.3 cubic feet, 16.4 cubic feet with a 0.83 foot one, and 19.8 cubic feet with12″ thickness.

It is important to know this information when shopping for a new mattress as there are sometimes odd sizes being sold. This can be due to manufactures working in metric and imperial units as manufacturing takes place in countries all around the world.

And I have found even just 0.5″ difference in measurements can make some OCD customers INSANELY UPSET! I guess them must have a pretty good life if that is what they have to complain about.

TIP: Make sure to measure your bedframe before purchasing a new model to make sure it will fit. The below are measurements MOST often found in stores and online.

Table 1. Twin size 0.67′ (8”) dimensions

SizeWidthLengthHeightSqftCuft
Twin3.17′6.25′.67′19.813.3

Table 2. With 0.83′ (10”) dimensions

SizeWidthLengthHeightSqftCuft
Twin3.17′6.25′.83′19.816.4

Table 3. With 1′ (12”) dimensions

SizeWidthLengthHeightSqftCuft
Twin3.17′6.25′1′19.819.8

For queen dimensions please see out charts here and king here, and full here.

Full

Full-size beds are 4.5′ wide by 6.25′ long for 28.1 square feet and the Double is the same, just a different term. Full XL is 4.5′ wide by 6.67′ long for 30 square feet. The three-quarter and antique are 4′ wide by 6′ long for 24 square feet.

Table 1. Full-size with 0.67” (8”)

Full SizeWidthLengthHeightSquareCubic
Full4.5′6.25′.67′28.118.8
Double4.5′6.25′.67′28.118.8
Full XL4.5′6.67′.67′30.020.1
Antique4′6′.67′24.016.0
Three-quarter4′6′.67′24.016.0

Table 2. With 0.83′ (10”)

Full SizeWidthLengthHeightSquareCubic
Full4.5′6.25′.83′28.123.3
Double4.5′6.25′.83′28.123.3
Full XL4.5′6.67′.83′30.024.9
Antique4′6′.83′24.019.9
Three-quarter4′6′.83′24.019.9

Table 3. With 1′ (12”)

Full SizeWidthLengthHeightSquareCubic
Full4.5′6.25′1′28.128.1
Double4.5′6.25′1′28.128.1
Full XL4.5′6.67′1′30.030.0
Antique4′6′1′24.024.0
Three-quarter4′6′1′24.024.0

Queen

Queen size beds in the US for the Standard is 5′ wide x 6.83′ long for 33.4 square feet, Olympic at 5.5′ x 6.83′ for 36.7 square feet, California at 5′ x 7′ for 23.5 square feet, and Split at 5′ x 6.83′ for 22.4 square feet.

Table 1. Queen size bed 0.67′ (8”)

Queen SizeWidthLengthHeightSqftCuft
Queen5′6.83′.67′33.422.4
Olympic5.5′6.83′.67′36.724.6
California5′7′ .67′35.023.5
Split5′6.83′.67′33.422.4

Table 2. Queen size bed 0.83′ (10”)

Queen SizeWidthLengthHeightSqftCuft
Queen5′6.83′.83′33.427.7
Olympic5.5′6.83′.83′36.730.5
California5′7′.83′35.029.1
Split5′6.83′.83′33.427.7

Table 3. Queen size bed (12”)

Queen SizeWidthLengthHeightSqftCuft
Queen5′6.83′1′33.433.4
Olympic5.5′6.83′1′36.736.7
California5′7′1′35.035.0
Split5′6.83′1′33.433.4

King

Standard king size beds are 6′ 4” wide by 6′ 8” long with the most common platform 1′ high off the floor and a 1′ high mattress. Combined with a platform foundation and mattress is 84.4 cubic feet. With a box spring frame and 1′ mattress, it is 126 cubic feet.

The below last two columns in the tables below are in square and cubic feet. I am trying to save space for mobile viewers.

Table 1. King size 0.67′ (8”)

King SizeWidthLengthHeightSqftCuft
King6.3′6.83′.67′42.228.3
Eastern6.3′6.83′.67′42.228.3
California6′7′.67′4228.1
Western6′7′.67′4228.1
Alaska9′9′.67′8154.3
Wyoming7′7′.674932.8
Alberta8′8′.676442.9

Table 2. With 0.83′ (10”)

King SizeWidthLengthHeightSqftCuft
King6.3′6.83′.83′42.235.2
Eastern6.3′6.83′.83′42.235.2
California6′7′.83′4234.9
Western6′7′.83′4234.9
Alaska9′9′.83′8167.2
Wyoming7′7′.834940.7
Alberta8′8′.836453.1

Table 3. With 1′ (12”)

King SizeWidthLengthHeightSqftCuft
King6.3′6.83′1′42.242.2
Eastern6.3′6.83′1′42.242.2
California6′7′1′42.42
Western6′7′1′4242
Alaska9′9′1′8181
Wyoming7′7′1′4949
Alaska8′8′1′6464

If there are other variations that you think should be included please contact me to let me know and I will add the information.

Sources:

Wikipedia Bed Size

Forbes: Key Measurements for Your Dream Bedroom

SF Gate: Standard Bed Sizes in the United States

Scott Boyd

A semi-retired workaholic in Thailand is a challenge. It is too hot to keep building adobe and earthbag buildings so a new project was needed. I became interested in bed frames after purchasing a bamboo bed frame from a local supplier here and I learned there is little information about them on the Internet. So now I spend my days researching, testing, and reporting my findings to help others while having an occasional beer and istening to 60s and 70s B side rock, blues, and much more.

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