Bunk Bed Dimensions (Standard & Different Sizes)

Here’s our guide to bunk bed dimensions for different mattress sizes, with standard, twin, full, double, triple, built-in, futons, and ladder sizes for double sleepers.

Bunk beds are two or more beds stacked on top of one another. It utilizes a single vertical space but will be safely constructed to let two to three people sleep simultaneously. This is an excellent option for homeowners with multiple children, sleepers for college dormitories, or even hostels and summer camps. 

Most types of bunk beds will come with two mattresses of equal sizes, but some variations will make the lower bunk more oversized than the upper level. Many of these bunk beds will come with ladders for easy access to the upper bunk, safety railings, or even curtains for added safety and privacy.

Standard Bunk Bed Sizes

There are so many configurations for bunk beds, but there are also basic or standard sizes. Double-decker beds with a single-sized mattress will be 75 inches or 191 centimeters in length; they will have a mattress depth of 39 inches or 99 centimeters, with a height of 65 inches or 165 centimeters. 

These bed sizes can have storage units on the bottom of the bunk and can be configured with other features like stairs on the sides for even safer access to the upper tier. They can be made of metal or strong wood to withstand a person’s weight or two people in the upper level. 

Twin Dimensions

Many bunk beds in stores will hold twin mattresses on one or two of the bunks. A twin double-decker bed will measure 70 inches or 178 centimeters long with a depth of 39 inches or 99 centimeters. These beds’ heights range from 63 to 65 inches or 160 to 165 centimeters. 

Other than the standard twin, there are also twin XL bunk beds to hold slightly longer mattresses. It will have a length of 72 inches or 183 centimeters and a depth of 40 inches or 102 centimeters. The same as a standard twin, twin XL beds, will range in height from 63 to 65 inches or 160 to 165 centimeters. 

Full Size Dimensions 

Full beds are designed for mattresses that measure to be 75 by 54 inches or 191 by 137 centimeters. Full bunks will be perfect for teenage rooms or even dormitories for college students.

Often, these frames will be constructed to hold a full mattress on the bottom with a top bunk of twin or twin XL size. 

This stacked design can fit up to four-person, with two people each. If a teenager is taller than average, choosing a full double-decker bed will offer more space than the twin XL stacked beds. 

Double Dimensions 

Another bigger option than the average is the double over double bunk bed or the double XL over double XL size.

The first one will have two double mattresses on top of each other that will have a length of 74 inches or 180 centimeters and a width of 54 inches or 137 centimeters. This size will offer more length than the full or a twin XL, perfect for taller persons. 

The double XL over double XL bed will run a length of 80 inches or 230 centimeters with a width of 54 inches or 137 centimeters. This is an excellent alternative for a queen size if the floor space in the room is limited. 

Triple Stacked Dimensions

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For homes with three kids or even families with triplets, owning a triple-decker bunk bed might remedy the problem of limited floor space. These sturdy beds will be safe for anyone; just take note of the weight requirement.

At the same time, it will also offer safety features like safety railings and a metal connection on each level to ensure durability. 

The average triple stacked sleeper will have a length of 79 inches or 201 centimeters, a width of 59 inches or 150 centimeters, and a height of 81 inches or about 206 centimeters. 

Built In Bunk-Bed Dimensions 

Built-in bunk beds will house all the other options that any homeowner can choose from other than the standard one-up and one-down beds. Depending on their preference, it can be L-shaped or even T-shaped. 

A built-in stacked bed designed in an L-shaped can include options like a study desk,  or even a wardrobe built-in on the space under the top bunk itself.

The bed sizes can be any types of mattresses that children would want. Still, more often than not, it will be available to house a bed at 75 inches or about 191 centimeters long with a width from side to side of 39 inches or approximately 99 centimeters. 

Futon Stacked Bed Measurements

Another great option for guest rooms or even resorts or hostels is opting to use futon bunk beds in their spaces.

A futon bed is a versatile furniture piece that doubles as a bed plus a seating option. When two guests are expected to use the room, the futon can easily be converted into a sleeper by adding the right mattress size. 

Usually, they will have a length of 78 inches or 198 centimeters, a width of 41.5 inches or 105 centimeters, and a height of 72 inches or 183 centimeters. 

Bunk Bed Ladder Dimensions

Bunk bed ladder sizes will differ with the height of a specific model, with the taller ones having longer ladders to get into the top level. For a standard 75 inches or 191-centimeter-long stacked bed, the ladder will usually be about 65 inches or 165 centimeters. 

What Size is a Bunk Bed Mattress? 

A bunk bed mattress size will depend on the frame size itself. A homeowner might have two twin stacked beds that need a mattress about 75 inches or 191 centimeters long with a width of 38 inches or 97 centimeters. 

Or it can have two full bunk beds, which will need a mattress at 75 inches or 191 centimeters in length with a width of 53 inches or 135 centimeters. 

See more related content in our article about bedroom layout ideas here.