King Size Bed Dimensions

Last Updated December 30, 2023

If you're in the market for a king-size bed, you're probably wondering just how big it is. King-size beds are perfect for those who need plenty of space to sleep, but not everyone knows the exact dimensions. In this blog post, we'll provide a detailed guide to buying the perfect king mattress, as well as list the dimensions of a king size bed. So whether you're upgrading from a queen or just looking for more space, read on for all you need to know about king size mattresses!

Key Takeaways:

  • King size beds are the largest standard-size beds available in the market.
  • The dimensions for a king size bed are 76 inches wide by 80 inches long, with each person having 38 inches of space.
  • King size beds are perfect for master bedrooms, as they can easily accommodate two adults and even a family of four with plenty of space to spare.
  • Before purchasing a king size mattress consider the room space, the bed frame, and the number of sleepers who will be using the bed.
  • King size beds can be more expensive than smaller bed sizes. So, it's important to plan ahead and budget accordingly.

king size bed dimensions

What is a king bed?

A king bed, also known as 'Eastern king,' is the largest standard-size bed on the market, providing ample room for sleepers to spread out and get comfortable.

latex mattress

King size beds are a popular choice for master bedrooms, as they can easily accommodate two adults with plenty of space to spare. However, some homeowners may find that a king bed is too expensive and can take up too much room in their bedroom. Despite this, the added width and length of a king bed offer unparalleled comfort.

What are the dimensions of a standard king size bed?

Dimensions in inches - 76 X 80 inches
Dimensions in cm - 193 X 203.5 cm
Dimensions in feet - 6.33 X 6.66 feet

The standard dimensions for a king size bed are 76 inches wide by 80 inches long. This provides ample room for two sleepers, with each person having 38 inches of space.

While there are variations in bed sizes depending on the manufacturer, these standard measurements ensure that all king size beds will fit appropriately in a bedroom and allow for the correct sizing of bedding and sheets.

king size mattress dimensions

History of king size bed

The king size beds we see today were not always the same; they evolved over the years. Here's some history!

The "king size" bed did not become a common fixture in households until the second half of the 20th century. Prior to this, beds were smaller and often only used by one person at a time. The introduction of the king size bed can be credited to manufacturers who wanted to offer larger options for couples.

In the late 1940s, people in the US used to rely on full size or twin beds. Due to the absence of larger-sized mattresses, the manufacturers used to advertise using two twin mattresses joined together by placing them adjacently. Well, that's how essential this was for making customers buy double what they would otherwise need! But it didn't take long before they realized that there is demand for larger mattresses than what was available at the time, which led to the manufacturing and introduction of queen & king sizes bed dimensions.

It all started when World War II ended; during this time period, the economy started booming, and Americans grew more prosperous and wanted to have everything that went along with it, including bigger beds! In the meantime, new marketing techniques were introduced and with the help of these advertising tactics, customers started to buy more than a double bed.

In the year 1961, bedding manufacturers started comparing full beds to that of cribs. And that's when the massive marketing worked - The king size bed quickly became popular for its ability to comfortably accommodate both partners, though it does require a larger bedroom space and may not be suitable for all households.

Despite its rise in popularity, the king size bed is still considered a luxury item and not as easily accessible or affordable as smaller bed sizes. Of course, today, it's become the standard in many households. Manufacturers continue to experiment with larger and more extravagant bed sizes, but the king reigns supreme as the ultimate symbol of comfort and luxury in the bedroom.

What to consider before choosing a king size bed?

Here are a few factors you must consider before choosing a king size bed.

Room space

First and foremost is the layout of your bedroom. A king size bed might seem like the ultimate luxury, but it could end up cramped and cluttered in a small space. On the other hand, a room with ample square footage can accommodate a king size bed without impacting traffic flow or making it difficult to move around the room.

why consider room space when shopping for a king mattress

It's crucial to plan ahead and measure the dimensions of your room before making any purchases to ensure that you'll have plenty of space for not only the bed itself but also for storage and maneuverability.

Bed frame

Before purchasing a king size mattress, make sure to measure your bed frame and confirm that it can accommodate the desired size. The bed frame dimensions of a king size mattress is 78-81 inches wide by 82-85 inches long.

Using a bed frame that is too small could result in the mattress hanging off the sides, causing discomfort and potentially damaging the structure of the bed frame. Likewise, using a bed frame that is too large can leave excess space around the edges of the mattress, affecting sleeping comfort and throwing off the aesthetics of your bedroom.

Number of sleepers

It's also important to think about who will be using the bed. Will it be just you, or will you have a partner sleeping with you? A king size bed offers plenty of room for two people to sleep comfortably, but if you plan on sleeping alone, a smaller size may be more practical and leave more room for other furniture.

Even though a king size mattress may seem like the obvious choice for couples, if both partners have different sleeping positions or preferences, it may be worth considering two twin XL mattresses instead. This way, each sleeper can customize their own side according to their needs.

Additionally, for families with growing children or pets who often join in on nighttime snuggles, a king size mattress might be a great option.


Before you whip out that credit card, consider your budget - because as much as a luxurious bed might sound appealing, it won't feel quite as comfortable when you're staring down a mountain of credit card debt. That being said, investing in a high-quality king mattress could end up being worth the higher price tag in the long run. Not only will it provide better support and comfort for a restful night's sleep, but with proper care and maintenance it could potentially last for years to come.

Choosing a king size bed can be a big investment, so thoroughly researching all these factors can help ensure that you make the best decision for both your physical comfort and budget.

King size variations and bed dimensions

Some manufacturers offer variations on the traditional king size. Here are a few of them:

California King

A California king mattress, also known as a Western king, measures 72 inches wide and 84 inches long. This is slightly narrower and longer than a traditional king mattress, which measures 76 inches wide and 80 inches long.

California king is a perfect option for taller individuals or those who appreciate the extra room to stretch out in bed. While a California king size mattress may be more challenging to find when shopping for sheets, bed frames, and other bedding accessories, the added space can make it worth the extra effort.

California king bed dimensions

  • Dimensions in inches: 72 X 84 inches
  • Dimensions in cm: 182.88 X 213.36 cm
  • Dimensions in feet: 6 X 7 feet

Wyoming king bed dimensions

Measuring 84 inches by 84 inches, Wyoming king is the smallest oversized mattress. It offers the same length as a California king with an extra 12 inches of width. This added width means even taller sleepers can stretch out comfortably, and couples have more room to snuggle or spread out during the night.

As with any mattress purchase, it's important to remember to carefully measure your bedroom before deciding on a Wyoming king size bed to ensure it will fit comfortably.

Wyoming king bed dimensions

  • Dimensions in inches: 84 X 84 inches
  • Dimensions in cm: 213.36 X 213.36 cm
  • Dimensions in feet: 7 X 7 feet

Texas king bed dimensions

Measuring 80 inches wide by 98 inches long, it offers a generous amount of space for both sleeping and lounging. It is also a great option for tall individuals or couples who want extra legroom.

However, a Texas king size bed may not fit in all bedrooms, so it's important to carefully measure your space before purchasing. Additionally, because of its size, finding sheets and other accessories can be more difficult and may require some extra searching.

Texas king bed dimensions

  • Dimensions in inches: 80 X 98 inches
  • Dimensions in cm: 203.2 X 248.92 cm
  • Dimensions in feet: 6.66 X 8.1 feet

Vermont king bed dimensions

Measuring 96 inches in width and length, Vermont king beds provide a spacious sleeping surface for maximum relaxation. As anyone who has slept on a standard king knows, having that extra bit of space can mean all the difference for a good night's rest. And with this extra room comes the opportunity for added comfort - think cozy blankets, plush pillows, and even room for a partner or beloved pet to join you in bed.

Vermont king bed dimensions

  • Dimensions in inches: 96 X 96 inches
  • Dimensions in cm: 243.84 X 243.84 cm
  • Dimensions in feet: 8 X 8 feet

Alaskan king bed dimensions

The Alaskan king size bed is the largest available option on the market, measuring a whopping 108 inches by 108 inches. That's nine feet in each direction, providing plenty of room for even the tallest sleepers to stretch out comfortably. It's also the best mattress choice for couples who want enough space for activities like cuddling or sleeping with pets.

Additionally, the larger size can make it difficult to navigate hallways and door frames when moving or rearranging your bedroom. If you have the space though, an Alaskan king size bed can provide a luxurious sleeping experience.

Alaskan king bed dimensions

  • Dimensions in inches: 108 X 108 inches
  • Dimensions in cm: 274.32 X 274.32 cm
  • Dimensions in feet: 9 X 9 feet

What is a split king mattress?

A split king mattress is made up of two separate mattresses, each measuring the size of a traditional twin xl mattress. These mattresses are joined together to form one large surface, but they can also be used individually.

what is a split king mattress dimension

The advantage of a split king over standard king is that it allows for customization - one side can have a different level of firmness or support than the other, making it a great option for couples with different sleep preferences. It also makes it easier to move and transport the mattress as each individual piece is smaller and lighter than a traditional king-size mattress.

While split king size mattresses may require separate fitted sheets, the added comfort and flexibility make them well worth the extra step in setup. So if you or your partner have unique sleep needs, consider upgrading to a split king mattress for an uninterrupted night's rest.

Which is the best option for couples - a queen size mattress or a king size mattress?

A queen-sized mattress offers a comfortable amount of space for two people, measuring 60 inches by 80 inches. Meanwhile, a king-sized mattress is even larger at 76 inches by 80 inches. For those who value having extra room to spread out, a king-sized mattress may be the better choice. On the other hand, if space is limited or cost is a concern, a queen-sized mattress can still offer ample room for sleeping comfortably as a couple.

It may be worth considering a split queen or split king size mattress if one partner has a different preference in terms of firmness or support.

Pros of king size bed

When shopping for a bed, one decision many consumers face is whether to choose a king size or a smaller option. While it may be more practical to choose the latter in terms of space constraints, there are several reasons to upgrade to a king mattress.

1. Extra comfort from extra space

Having enough space to move around comfortably can make all the difference in achieving deep, restful slumber. A king size bed offers just that - extra room to stretch out and relax. Not only does this bring added comfort, but it also allows for flexibility in terms of sharing the bed with a partner or sleeping with children or pets.

Couples no longer have to worry about their partner hogging the bed or kicking them in their sleep, and there is plenty of room for children or pets to join in. In addition, king size beds offer enough space to comfortably fit extra pillows, blankets, and bedding.

A king size bed also adds a sense of luxury and opulence to a bedroom, making it a desirable feature for those looking to impress guests or simply enhance their own personal comfort at home.

2. Space for quality time

    The extra space offered by a king size bed allows for more versatile arrangements and added room for activities such as reading or watching television with family in bed.

    king mattress offer space for quality time

    3. Fits into most master bedrooms

    Another benefit of king beds is that they typically fit easily into most master bedrooms without overcrowding the space. This allows for easy arrangement of other furniture pieces, such as dressers and nightstands. Whether your design style leans towards minimalism or extravagance, a king bed can serve as a perfect centerpiece for your master bedroom.

    4. Accessories are easily available

    From mattress protectors to sheets, having easy access to necessary items can ensure a comfortable and enjoyable sleeping experience. Fortunately, king size beds have a wide range of accessories readily available on the market. This makes it easy to find the perfect match for your bed in terms of style and function.

    natural and organic latex mattress topper

    Cons of king size bed

    While a king size bed may seem like the perfect place to sink into after a long day, there are definitely some drawbacks to consider before making such a big investment.

    1. Expensive

    King mattresses often come with a hefty price tag, making them inaccessible to those on a budget. Just think twice - having all that extra space can feel indulgent and decadent, but is it really worth breaking the bank?

    2. Can be heavy

    Moving the bed might be a hassle, as they often require multiple people and can't fit through standard door frames, making rearranging furniture or moving houses difficult.

    king mattresses can be heavy

    3. Not suitable for smaller/medium-sized rooms

    And because king size beds take up so much space in the room, it may limit your furniture options and leave little room for activities such as yoga or exercise.

    King size bed and mattress accessories

    Here's a list of bed and mattress accessories that can make sleeping on a king mattress more enjoyable:

    Bed frames

    Your bed frame is just as important as your mattress. Not only does it provide stability, but it also ensures that your mattress gets proper support and allows for maximum comfort. Without one, your king size mattress is just an expensive heap on the floor - not the luxurious sleeping experience you deserve. And when it comes to finding the perfect bed frame, size matters too - after all, there's nothing worse than buying a frame only to have it not fit your mattress.

    The average measurements for a king bed frame are 78 to 81 inches by 82 to 85 inches, so be sure to do your research before committing to a purchase.

    Mattress topper

    Another best way to upgrade your sleeping experience on a king mattress is with a plush mattress topper. These additions give you an extra layer of cushioning, making it feel like you're sleeping on a cloud. They also provide added support for high-pressure points, reducing aches and pains. Another benefit of investing in a mattress topper is the ability to extend the lifespan of your mattress, protecting it from wear and tear.

    mattress topper - king bed accessories

    With options ranging from latex to goose down, these affordable accessories can provide a luxurious upgrade without the expense of buying a new mattress. And once you find the perfect topper for you, your king size bed will feel like even more of a dreamy retreat.

    Mattress protector

    And don't forget about the mattress protector. This simple yet effective tool provides a barrier against any spills or accidents, keeping your mattress in pristine condition. It also acts as an extra layer of protection against dust mites, allergens, and bacteria for a healthier sleeping environment.


    Don't underestimate the power of pillows - they are a must for anyone looking to truly sink into their king bed and get a good night's sleep.

    pillows - king bed important accessories

    When on a king size mattress, one pillow may seem insufficient - but with careful placement and attention to pillow height and firmness, it can be just what you need for maximum comfort. A thick, fluffy pillow under your head provides support for the neck and spine, while a thinner one under your knees can alleviate pressure on the lower back. And don't forget about pillows for arm support! Strategically placed pillows can provide added cushioning and keep your body in alignment while lying down.

    Choose from latex, feather-filled, memory foam, or even cooling gel options - the sky's the limit.


    Next, you want to make sure that you have the perfect sheets for your king size mattress. When shopping for sheets, it's important to consider not just the size but also the thread count and material. A higher thread count means softer, more luxurious sheets, but keep in mind that materials can also affect comfort levels.

    100% cotton is a popular choice for its breathability and softness, while blended fabrics like microfiber or bamboo can offer unique benefits such as temperature regulation. However, we recommend you go for natural or organic options for ultimate comfort.

    Don't forget practical considerations as well - opt for deep-pocketed sheets to fit thicker mattresses, and consider easy care options if you're short on time for laundry.


    The perfect king size mattress is nothing without a cozy comforter to complete the bedding experience. Cuddled up in a sea of plushness, you'll drift off into dreamland with ease. A snug, comfortable comforter adds just the right touch of warmth, allowing for restful nights and energetic mornings.

    cozy comforter - king bed accessory

    When it comes to choosing a comforter for your king size mattress, think about the level of warmth you want from your comforter. Do you prefer to sleep on the cooler side, or do you need extra warmth during those chilly winter nights? The next thing to consider is the material of the comforter. Would you prefer a fluffy down option, or do you have allergies that call for a hypoallergenic alternative? And, of course, don't forget about style! Choose a comforter in color and pattern that enhances the overall look and feel of your bedroom.

    Other standard mattress sizes and dimensions - Know which mattress size is right for you

    In addition to the king size, there are several other standard mattress sizes to consider. These include:

    Twin size mattress

    Twin size mattresses measure 39 inches by 75 inches, making them best mattress for kids or adults who prefer to sleep solo. It's also commonly used in bunk beds and daybeds, and can easily fit into tight spaces like college dorm rooms and studio apartments.

    Twin size bed dimensions

    • Dimensions in inches: 38 X 75 inches
    • Dimensions in cm: 96.5 X 188.0 cm
    • Dimensions in feet: 3.16 X 6.25 feet

    Twin xl size mattress

    A twin xl mattress measures 38 inches wide and 80 inches long. This extra length gives tall individuals some much-needed room to stretch out and get comfortable. It's also ideal for dorm rooms, as the XL length fits comfortably in even the smallest of university beds.

    Twin XL size bed dimensions

    • Dimensions in inches: 38 X 80 inches
    • Dimensions in cm: 96.5 X 203.5 cm
    • Dimensions in feet: 3.16 X 6.66 feet

    Full size mattress

    A full bed, also known as a "double beds" in some countries, offers just enough space for sweet dreams. Full size mattresses measure 54 inches by 75 inches. This makes it a comfortable sleeping option for one person but may be a tight squeeze for two individuals. It's also a great option for small bedrooms or guests rooms where space may be limited.

    Full size bed dimensions

    • Dimensions in inches: 54 X 75 inches
    • Dimensions in cm: 137.16 X 190.5 cm
    • Dimensions in feet: 4.5 X 6.25 feet

    Queen size mattress

    Measuring 60 inches by 80 inches, the queen mattress offers plenty of space for both you and a significant other (or perhaps just yourself, if you prefer to spread out). And unlike its smaller counterpart, the full size mattress, it won't leave you hanging off the edge in the middle of the night. Not quite as spacious as a king size, but not overly cramped like a twin bed, the queen size option lies in the middle of the spectrum.

    Queen size bed dimensions

    • Dimensions in inches: 60 X 80 inches
    • Dimensions in cm: 152.4 X 203.2 cm
    • Dimensions in feet: 5 X 6.66 feet
    (Width x Length)
    (Width x Length)
    (Width x Length)
    Twin 38 X 75 inches 96.5 X 188.0 cm 3.16 X 6.25 feet
    Twin XL 38 X 80 inches 96.5 X 203.5 cm 3.16 X 6.66 feet
    Full 54 X 75 inches 134.5 X 190.5 cm 4.5 X 6.25 feet
    Queen 60 X 80 inches 152 X 203.5 cm 5 X 6.66 feet
    King 76 X 80 inches 193 X 203.5 cm 6.33 X 6.66 feet
    California King 72 X 84 inches 183 X 213.5 cm 6 X 7 feet


    Will a king size bed fit in my room?

    This can vary based on the layout and measurements of your room, so make sure to take careful measurements before buying the bed.

    Can two people comfortably sleep in a king size bed?

    Absolutely! In fact, there is enough room for a third person to sleep comfortably as well.

    Do I need special sheets for a king size bed?

    Most standard sheets will fit, but for maximum comfort you may want to invest in special king sized sheets.

    Will my pets be able to join me in the king size bed?

    If you have furry friends who like to snuggle up with you at night, the extra space may give them room to join the fun without crowding you out.

    Is a king size mattress the same as a California king mattress?

    No, they are not the same. King size beds measure 76 inches wide by 80 inches long, while California kings measure 72 inches wide by 84 inches long.

    While both options offer an ample amount of space for sleepers, the longer length of the California king mattresses may be just what tall individuals are looking for.

    Can I put a king size mattress on a queen bed frame?

    No! A king size mattress is designed to fit in a king size bed frame. If you try to squeeze in a king mattress into a queen size bed frame, not only will it be uncomfortable, but you also run the risk of damaging both your mattress and bed frame. So instead of risking it all for a not-so-perfect fit, why not invest in a sturdy, appropriately sized bed frame? Trust us; you'll sleep much better at night knowing that your mattress is properly supported.

    natural and organic pillows

    Is it worth upgrading to a king size bed?

    When it comes to beds, bigger is definitely better. Upgrading to a king size bed not only provides more room for you and your partner to spread out and get comfortable but also eliminates the dreaded middle-of-the-night elbow jab. Plus, king size beds offer extra space for cuddling with pets or little ones, or even just having some extra room for yourself on those cozy nights in with a good book.

    A family with young children in a king size bed

    If you've been stuck sleeping on a cramped full or queen size bed, upgrade to a king size bed and experience the ultimate in comfort and relaxation. Trust us; once you go king, you'll never want to go back.

    Related blog posts:

    1. Mattress Sizes Chart and Bed Dimensions Guide

    2. Wyoming King vs. Alaskan King vs. Texas King

    3. King vs. Split King Mattress Size

    4. Queen Size Bed Dimensions

    5. Twin vs. Full vs. Queen Mattress Size Comparison

    With all of this information in mind, you should be ready to shop for your new king mattress with confidence! Keep in mind that the best way to determine if a mattress is right for you is to try it out in person. Once you've found the best fit, you'll be on your way to enjoying years of comfortable sleep.

    Disclaimer: What is said in this article has been referenced from multiple sources and is intended only for educational and informational purposes. Please note that no content in this article is a substitute for professional advice from a qualified doctor or healthcare provider. Always consult an experienced doctor with any concerns you may have regarding a health condition or treatment, and never disregard any medical suggestions or delay in seeking treatment because of something you read here.

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