Can A Queen Mattress Fit On A Full Bed Frame? – Everything You Need To Know!

When the fact is about fitting a queen mattress on a full bed, the answer is both yes and no. Depending on the design of the bed frame and bed frame construction, a queen mattress can fit on a full bed frame.

Typically, most bed frames made of metal are adjustable into various sizes. So, you can adjust such a bed frame from full to queen size. However, a queen mattress will not fit on a full bed frame if the structure is fully enclosed on all sides.

Want to know more about how to adjust a metal bed frame? Read on to discover the various bed sizes and factors affecting whether a queen mattress fits on a full bed frame.

Understanding Bed Sizes

When buying a mattress, you must consider the bed frame size. Generally, there are at least 6 standard bed or mattress sizes available. These include:

  • Twin
  • Twin XL
  • Full or double bed
  • Queen
  • King
  • California King

However, the queen and full bed sizes are two of the most popular choices for most people. A queen size bed is more significant than a full bed, measuring 60″ wide and 80″ long. Meanwhile, a full or double bed measures 54″ wide by 75″ long.

So, compared to a full bed, a queen bed is 6″ wider and 5″ longer. Also, a queen bed boasts an approximately 4,800 square inches surface area, while a full bed is around 4,050 square inches.

When choosing a mattress, the bed frame’s dimensions should roughly match the mattress size. However, if the bed frame is too small, the mattress may bend, fold, or sag. And if it is too big, the mattress will leave gaps. Consequently, you may:

  • Risk damaging the bed frame
  • Experience disrupted sleep patterns
  • Suffer from back and neck pain
  • Reduce the life of the mattress

So, to ensure you have the correct measurements, measure from the head to the foot of the bed frame to get the length. Then, measure from side to side for width with your measuring tape.

Will a Queen Mattress Fit on a Full Bed Frame?

Yes and no. Yes, only if the full bed frame is a platform-kind-of bed. A platform bed usually has all the sides open apart from the headboard. 

However, on a platform bed, the queen mattress may not offer the best comfort and support. This is because it is 6 inches wider and 5 inches longer than a full bed frame. Therefore, some of the mattress’s parts will hang on the bed frame’s sides.

Another scenario where a queen mattress may fit on a full bed frame is if it is a metal frame. This is because most full-size metal bed frames are adjustable. Therefore, you can adjust the bed frame from full to queen size to fit your mattress.

On the other hand, if all 4 sides are enclosed, the Queen mattress will not fit a full bed frame. After all, a queen mattress is more significant than a full or double-size bed frame. Therefore, it will not enter the frame and won’t be perfectly flat, making for an uncomfortable night’s sleep.

Also, if the bed frame is made of wood, your queen mattress will not fit because such a frame is not adjustable. Consequently, this may cause:

  • A lot of squeaking and creaking noises
  • Mattress to sag
  • Incorrect spinal alignment and back pain problems

Factors to Consider Fitting a Queen Mattress on a Full Bed Frame

Several factors may affect whether your queen mattress fits on a double bed frame. These include:

Bed Frame Design

Some full bed frames have all sides enclosed, while others only have the headboard but no side rails or a footboard. With this regard, those with three sides open can fit a queen bed with minimal effort.

Bed Frame Construction

Bed frames are typically constructed of metal or wood. Unlike wood frames, most full metal bed frames can be expanded to fit a queen mattress comfortably.

Type of Mattress

Generally, all-natural latex foam mattresses are easy to downsize by cutting them so they fit in a smaller bed frame. However, this is not the case with other mattress types like air mattresses.

Pros & Potential Risks of Using Ill-Fitting Mattress

Using an ill-fitting mattress has several potential risks. These include:

  • Difficulty falling asleep
  • Poor physical health, including fatigue and aches
  • Multiple nighttime awakenings
  • Concentration problems
  • Weakened immune system due to poor sleep
  • Increased chronic pain

With all the above cons of using a queen mattress on a double bed frame, the only pros are affordability and space-saving. A full bed frame is more affordable and takes up less space than a queen bed frame.

How To Adjust A Metal Bed Frame From Full to Queen

How To Adjust A Metal Bed Frame From Full to Queen

Following are instructions on adjusting a full metal bed frame to fit a queen mattress.

Step 1: Locate the Center Support

Start by locating the bed frame’s center support, a long metal bar running down the bed frame’s center. It is secured in place by two metal bars on either side.

Step 2: Unfasten the Metal Bars

Next, unscrew the bolts or nuts on the metal bars that secure the center support in place. You could use pliers or a wrench.

Step 3: Adjust the Length and Width

To adjust the length, you will need to buy converter rails or frames and steel plates. The plates are for attaching the bolts that come with the converter rails to your full bed.

Next, install the steel plates on the foot or headboard of your bed and follow the manufacturer’s instructions. The converter rail length will already be long enough to fit a queen mattress.

To adjust the width, slide the center support bar to the left. You want to ensure the bed frame’s width measures 60″ from 54″, while the length should be 80”.

Step 4: Reattach the Side Metal Bars

Next, screw back the two metal bars to the sides of your bed frame, ensuring the center support bar is secure. Then, use a measuring tape to measure the length and width of the bed frame from side to side. It should count at least 80” long and 60″ wide to make it a queen-sized bed frame.

Tips and Tricks for Making a Queen Mattress Fit On a Full Bed Frame

Check out some tips, products, or accessories available to help you fit a queen mattress on a full bed frame.

  • You can use a mattress retainer bar or bed straps to keep your queen mattress in place, preventing it from slipping.
  • Place a plywood or board between the frame and the mattress if the bed frame is open on at least 3 sides. The plywood will provide extra support.
  • Invest in the best bed frame extender kits. Such kits have rails that you can use to extend the length of your full bed frames.
  • If you have a platform bed frame, you can weld additional metal onto your full bed frame, making it fit a queen mattress.
  • Get a headboard adapter kit. This kit contains modification plates that enable you to use a queen mattress with a full-sized headboard and footboard.

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But what happens if the bed frame does not support your queen mattress adequately after trying these tips? Without a doubt, you should get a new bed frame.

Also, there is no need to implement any of the above tips if your full bed frame is old and worn out. Instead, you should invest in a new bed frame. Getting a new bed frame will also make sense if you are not on a tight budget.

This section covers the frequently asked questions on Queen Mattress


Q: Are queen and full bed frames the same?

Two of the most popular sizes of beds are full and queen size beds, and while they may look similar at first glance, there are significant differences between them that could affect your sleeping experience. Full size beds typically measure 54 inches in width and 75 inches in length, making them a few inches wider and shorter than a queen size bed.

Q: Are bed frames supposed to be bigger than mattress?

Bed frames are generally designed to be slightly larger than the mattress, size of bed frames can range from 2 inches to 5 inches larger than the size of the mattress. It is important to ensure that the bed frame size matches the mattress size to avoid any issues with fit and safety.

Q: Do 2 fulls make a queen?

No, two full size beds do not make a queen size bed, it makes little larger. A full size bed, also known as a double bed, typically measures 54 inches wide by 75 inches long, while a queen size bed measures 60 inches wide by 80 inches long.

Q: What Age is Queen Size Bed for?

No specific age is appropriate for a child to switch to a queen size bed. A queen size bed is a versatile and comfortable choice for children and adults. While no specific age is appropriate for changing to a queen size bed, it is important to consider factors such as the size of the room, growth spurts, sleep habits, and personal preferences.


Understanding the different bed sizes available is crucial before investing in a mattress. This is because there are several risks of sleeping on a mattress that does not fit perfectly on a bed frame.

Now, while a queen mattress is more significant than a full bed frame, you can sometimes use them together. However, some factors may affect whether the queen mattress fits on the double bed frame.

Nothing to worry about, though, if it does not fit. This is because there are tips and tricks for making such a mattress work on a double bed frame. Ultimately, you should buy a new bed frame according to the size of the Queen mattress if your old bed frame gets worn and torn.

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Rene C. Evans

Hi, I'm Rene C. Evans author and owner of this website. Though this website is not related to manufacturing company of mattresses but I extensively studying, and analyzing mattresses and inform you solutions regarding mattress problem that will help you to take rest properly.

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