Do Two Full Size Beds Equal A California King Bed?

When furnishing a bedroom, one common question is whether pairing two full size beds together is equivalent to a California king mattress. With their longer dimensions, California kings appeal to tall people or couples who like to spread out at night.

If you’re short on time, here’s a quick answer to your question: Two full size mattresses placed side-by-side are slightly shorter in length and narrower in width compared to a true California king mattress.

California King Bed Dimensions


The California King bed is known for its generous length, making it a popular choice for taller individuals or those who simply prefer more space to stretch out. The standard dimensions for a California King bed are approximately 72 inches in width and 84 inches in length.

This makes it 4 inches longer than a standard King bed, providing ample room for even the tallest sleepers to fully relax and get a good night’s sleep.

When comparing the length of a California King bed to two full-size beds, it’s important to note that two full-size beds side by side would actually be shorter than a California King. Each full-size bed typically measures around 54 inches in width and 75 inches in length, resulting in a combined length of 150 inches.

This means that two full-size beds would fall short by 34 inches when compared to the length of a California King bed.


While the California King bed excels in length, it is slightly narrower than a standard King bed. The width of a California King bed is approximately 72 inches, whereas a standard King bed measures around 76 inches in width.

This difference of 4 inches may not be significant for some, but it’s worth considering if you prioritize width over length in your sleeping arrangements.

When comparing the width of a California King bed to two full-size beds placed side by side, the combined width of the full-size beds would be 108 inches. This means that two full-size beds would be wider than a California King bed by 36 inches.

However, it’s important to note that this comparison is based on placing the full-size beds side by side, which may not provide the same level of comfort and support as a single California King bed.

For more information about bed sizes and dimensions, you can visit websites like or, which provide comprehensive guides and resources on choosing the right bed for your needs.

Twin / Full Size Bed Dimensions

Full Mattress Length and Width

When it comes to twin and full size beds, it’s important to understand their dimensions in order to make an informed decision. A twin bed, also known as a single bed, typically measures 39 inches wide and 75 inches long.

On the other hand, a full size bed, also known as a double bed, is slightly wider and measures 54 inches wide and 75 inches long. Therefore, a full size bed is significantly wider than a twin bed, providing more space for a single sleeper or even accommodating two individuals comfortably.

Did you know? The extra width of a full size bed can make a significant difference in terms of comfort, especially for taller individuals or those who prefer to stretch out while sleeping.

Box Spring Dimensions

Box springs are an important component of the bed, providing support and stability. The dimensions of a box spring typically correspond to the size of the mattress it supports. For a twin bed, the box spring is usually 39 inches wide and 75 inches long.

Similarly, for a full size bed, the box spring measures 54 inches wide and 75 inches long.

Fun fact: Box springs are not always necessary for every type of bed. Some modern bed frames are designed to provide adequate support without the need for a box spring.For more detailed information on bed dimensions and types, you can visit websites like The Sleep Judge or The National Sleep Foundation.

Side-by-Side Full Size vs. California King

Total Surface Area Comparison

When it comes to comparing the total surface area of two full size beds and a California king bed, there is a noticeable difference. A full size bed typically measures 54 inches in width and 75 inches in length, while a California king bed measures 72 inches in width and 84 inches in length.

This means that when you place two full size beds side-by-side, the total surface area would be 108 inches in width and 75 inches in length.

On the other hand, a California king bed provides a much larger surface area, with 72 inches in width and 84 inches in length. This makes it wider and longer than two full size beds combined. Therefore, in terms of surface area, a California king bed offers more space for comfortable sleeping and relaxation.

Impact on Bedding Needs

One important aspect to consider when comparing two full size beds to a California king bed is the impact on bedding needs. Since a California king bed is larger in size, it requires specialized bedding to fit properly.

This includes fitted sheets, comforters, and mattress toppers specifically designed for a California king bed.

On the other hand, when using two full size beds side-by-side, regular bedding for full size beds can be used without any specific adjustments. This can be beneficial for individuals who already have full size bedding and do not wish to purchase new bedding for a larger bed.

It’s worth noting that the availability of bedding options for California king beds may vary compared to full size beds. While full size bedding is widely available in stores and online, California king bedding might require more effort to find.

However, with the increasing popularity of California king beds, the availability of bedding options has also improved significantly in recent years.

California King Frame Considerations

Need for Reinforced Center Support

When considering whether two full-size beds can equal a California King bed, it is essential to take into account the need for reinforced center support. A California King bed is larger than a standard full-size bed, measuring 72 inches wide and 84 inches long.

This extra size requires additional support to prevent sagging or bowing in the middle of the bed.

A California King bed frame typically includes a center support bar or slats that provide stability and distribute the weight evenly. This reinforcement ensures that the mattress and box spring are adequately supported, preventing any discomfort or potential damage to the bed frame over time.

Without proper center support, using two full-size beds together may result in an uneven sleeping surface and potential structural issues.

Footboard and Headboard Spacing

Another factor to consider when combining two full-size beds to create a California King bed is the footboard and headboard spacing. California King bed frames are designed with dimensions that accommodate the longer length of the mattress, ensuring there is enough space for a footboard and headboard to be attached.

When using two full-size beds, it is crucial to measure the width and length of each bed’s footboard and headboard to ensure they align properly when joined together. If the footboard or headboard does not fit correctly, it can compromise the overall aesthetic and functionality of the bed.

To create a seamless look, it may be necessary to make adjustments or modifications to the footboard and headboard to ensure they fit together securely. Consulting a professional or referring to manufacturer guidelines can help ensure a successful integration of two full-size beds into a California King bed frame.

For more information on bed frame considerations, you can visit for expert advice and tips.

Design and Decor Options

When it comes to designing and decorating a bedroom with two full size beds, there are several options to consider. From coordinating different mattress heights to creative use of nightstands and bedding, these choices can greatly impact the overall look and feel of the room.

Coordinating Different Mattress Heights

One of the challenges when combining two full size beds is dealing with the potential difference in mattress heights. This can occur if the beds are purchased at different times or from different manufacturers. However, there are ways to overcome this issue.

Firstly, you can use mattress toppers to equalize the heights. These are available in various thicknesses and can provide the necessary adjustment. Additionally, certain bed frames offer adjustable height options, allowing you to match the heights of the mattresses effortlessly.

Another option is to embrace the height difference and use it to your advantage. You can create a layered effect by placing the taller bed against the wall and the shorter bed in front of it. This can add visual interest to the room and create a unique focal point.

Creative Use of Nightstands and Bedding

Incorporating nightstands into the design of a bedroom with two full size beds can be both functional and aesthetically pleasing. Instead of using individual nightstands for each bed, consider using a single, larger nightstand placed between the two beds.

This can create a cohesive look and provide a shared space for both sleepers.

When it comes to bedding, coordinating the colors and patterns can help tie the two beds together. Opt for matching or complementary bedding sets to create a cohesive look. You can also experiment with different pillow arrangements and throws to add texture and visual interest.

For more design inspiration and ideas, you can visit websites like or These websites offer a wealth of information and resources to help you create a stunning bedroom with two full size beds.


While two full size mattresses lined up together may seem equivalent to a California king, the actual dimensions differ slightly. True California king beds provide extra length for tall people and couples.

That said, side-by-side full beds can work for some situations. Just be mindful of the gap between mattresses, and take measurements when shopping for bedding.

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