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Best King Size Box Spring (2025 Updated)

If you’re looking for a good night’s sleep, investing in the right foundation for your mattress is key. A king size box spring is a great option for those with larger beds who want a comfortable and supportive foundation. But before you make your purchase, there are a few factors you should consider.

Firstly, make sure you measure your bed frame to ensure that a king size box spring will fit properly. You should also think about the height – do you want a higher bed or something lower to the ground? Another important factor is the durability and material of the box spring – you don’t want something that will break or wear down easily.

Are you tired of waking up with aches and pains? Do you want to sleep more comfortably at night? A king size box spring might just be the solution you’ve been looking for. But with so many options out there, it can be overwhelming to choose the right one. How do you know what size to get? What material should you look for? And most importantly, how do you find a box spring that will provide the support you need for a great night’s sleep? Keep reading to find out.

Are you tired of your mattress feeling lumpy and uneven? Are you tired of constantly having to adjust your pillows and sheets? A king size box spring could be the simple solution you need to improve the quality of your sleep. But with so many options out there, it’s important to consider the height, material, and durability before making your purchase. In this article, we’ll give you the lowdown on everything you need to know before choosing the perfect king size box spring for your bedroom.

10 Best King Size Box Spring

# Product Image Product Name Product Notes Check Price
1
Ideal for providing a sturdy metal frame and foundation for king-sized mattresses that is easy to assemble.
2
Ideal for providing sturdy support to a king-sized mattress and enhancing its height, making bed access easier.
3
The product is ideal for providing a strong and easy-to-assemble foundation for a king-sized mattress.
4
This product is ideal for providing a sturdy foundation for a split king size mattress without the need for assembly.
5
The product is ideal for providing sturdy support and comfortable cushioning to a king-size mattress.
6
This product is ideal for providing a sturdy foundation for a split king sized mattress.
7
The product is ideal for providing support and stability to a king size mattress while also being easy to assemble.
8
The product is ideal for those in need of a sturdy and easy-to-assemble foundation for their King sized mattress.
9
Ideal for supporting Split King mattresses with a sturdy metal structure and no assembly required.
10
This product is ideal for providing a strong and sturdy foundation for a king-size mattress.
Ideal for providing a sturdy metal frame and foundation for king-sized mattresses that is easy to assemble.
Ideal for providing sturdy support to a king-sized mattress and enhancing its height, making bed access easier.
The product is ideal for providing a strong and easy-to-assemble foundation for a king-sized mattress.
This product is ideal for providing a sturdy foundation for a split king size mattress without the need for assembly.
The product is ideal for providing sturdy support and comfortable cushioning to a king-size mattress.
This product is ideal for providing a sturdy foundation for a split king sized mattress.
The product is ideal for providing support and stability to a king size mattress while also being easy to assemble.
The product is ideal for those in need of a sturdy and easy-to-assemble foundation for their King sized mattress.
Ideal for supporting Split King mattresses with a sturdy metal structure and no assembly required.
This product is ideal for providing a strong and sturdy foundation for a king-size mattress.

1. Zinus 7 Inch Metal Smart Box Spring / Mattress Foundation / Strong Metal Frame / Easy Assembly, King

Bring a touch of elegance to your bedroom with this stunning platform bed. Featuring a neutral color and sophisticated design, this bed foundation will complement any decor. The bed's dimensions are 79"L x 75.5"W x 7"H, making it a perfect fit for any standard-sized bedroom.

This bed foundation is durably engineered with a steel construction that ensures long-lasting use. The twin size can support a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs. This makes it an excellent choice for couples or individuals who want a sturdy and reliable bed.

The bed comes thoughtfully packaged with all parts, tools, and instructions included in one compact box that ships straight to your door. You will need a bed frame or platform bed to support this foundation, which is sold separately.

This bed foundation comes with a worry-free 5-year limited warranty, giving you peace of mind and assurance that you are making a wise investment in your bedroom furniture. The King size bed has dimensions of 79" X 76" X 7" and weighs 43.98 lb.

Pros

  • Neutral color and sophisticated design to complement any decor
  • Durable steel construction for long-lasting use
  • Supports a maximum weight capacity of 700 lbs for couples or individuals
  • Thoughtfully packaged with all parts, tools, and instructions included
  • Worry-free 5-year limited warranty included

Cons

  • – Requires a bed frame or platform bed for support, which is sold separately

2. King Wood Box Spring: High & Sturdy

The Natural Wood Interior Box Spring is a strong and sturdy foundation that is designed to support memory foam or latex mattresses. It features thicker wood slats than most traditional box springs, which makes it more durable and reliable. The interior framework of this foundation is constructed with durable wood, and the slats are spaced 2.8 – 3.4 inches apart.

This box spring comes with an 8-inch high profile design that is perfect for shorter mattresses or for those who prefer their bed to be higher off the floor. It is thoughtfully packaged with all the necessary parts, tools, and instructions included in one compact box that will ship straight to your door. The twin size can support a maximum weight capacity of 250 lbs, while all other sizes can support up to 500 lbs.

Please note that this box spring is sold separately and requires a bed frame or platform bed to support it. The product comes with a worry-free 5-year limited warranty to give you peace of mind.

Pros

  • Thicker wood slats than most traditional box springs for durability
  • 8-inch high profile design for shorter mattresses or for those who prefer a higher bed
  • Thoughtfully packaged with all necessary parts, tools, and instructions included
  • Worry-free 5-year limited warranty included

Cons

  • – It requires a bed frame or platform bed to support it

3. Zinus 9 Inch Metal Smart Box Spring / Mattress Foundation / Strong Metal Frame / Easy Assembly, King

Introducing the Smart Box Spring, a revolutionary product that will change the way you think of box springs. Unlike traditional box springs, the Smart Box Spring is constructed with solid steel that can be assembled in no time. Its solid steel interior framework provides unparalleled durability, making it the last box spring you'll ever need. With a maximum weight capacity of 350 lbs for twin size and up to 700 lbs for all other sizes, you can trust that this product will provide long-lasting support for your mattress.

The high profile design of the Smart Box Spring is perfect for shorter mattresses or for those who prefer a higher bed. At 9 inches tall, it provides ample space underneath for storage while giving your bed a modern and elevated look. The Smart Box Spring is thoughtfully packaged with all parts, tools, and instructions included in one compact box that is shipped straight to your door. Plus, it comes with a worry-free 5-year limited warranty.

Please note that the Smart Box Spring is a foundation only, and a separate bed frame or platform bed is required to support it. With its durable construction, easy assembly, and modern design, the Smart Box Spring is an excellent choice for anyone looking to upgrade their sleep experience.

Pros

  • Solid steel construction provides unparalleled durability
  • Easy assembly with all parts, tools, and instructions included
  • High profile design offers ample storage space underneath the bed
  • Worry-free 5-year limited warranty included

Cons

  • – Requires a separate bed frame or platform bed to support it

4. Zinus Split King Metal Box Spring Set

Introducing the No Assembly box spring, the innovative foundation that requires zero assembly and no tools. This box spring is bedtime ready in just a few simple steps. The hardest part of the process will be taking it out of the box! It is the perfect solution for anyone who wants a hassle-free setup.

The No Assembly box spring is durably engineered with a reliable interior framework constructed from high-quality steel. It can support up to 350 lbs for twin sizes and up to 700 lbs for other sizes, including split versions for Queen, King, and Cal King. You can sleep soundly knowing that your mattress is fully supported by a sturdy and robust foundation.

The No Assembly box spring is designed with a high profile, measuring 9 inches in height. This feature makes it perfect for shorter mattresses or for those who prefer a higher bed off the floor. It is an excellent choice for anyone who wants a comfortable and cozy sleeping experience.

All parts and instructions for the No Assembly box spring are thoughtfully packaged into one compact box that ships straight to your door. You won't have to worry about any missing pieces or complicated instructions. The box spring also comes with a worry-free 5-year limited warranty, so you can relax and enjoy your purchase.

Please note that the No Assembly box spring is only the foundation and requires a bed frame or platform bed to support it. This item is sold separately, but once you have it, you'll be able to enjoy a comfortable and reliable foundation for your mattress.

Pros

  • Requires no tools and zero tedious assembly
  • Durable steel construction supports up to 700 lbs
  • 9-inch height is perfect for shorter mattresses or those who prefer a higher bed
  • All parts and instructions are thoughtfully packaged into one compact box
  • Comes with a worry-free 5-year limited warranty

Cons

  • – Requires a bed frame or platform bed to support

5. Zinus Fabric Panel King Mattress Foundation

The Style & Substance foundation is a sturdy and stylish solution for your bed frame needs. It features a unique design with thick wooden slats, a steel and plywood structure, and grey fabric panels that give it an upholstered look. This foundation is built to last with thick plywood on the interior and 2.8 inch wood slats covered in a durable woven grey fabric. It can support any latex, memory foam, or spring mattress.

You can customize the height of your bed with three different profiles available. Whether you prefer a higher or lower bed, this foundation can accommodate your preferences. The twin size can support up to 350 lbs, while all other sizes can support up to 700 lbs.

This foundation is thoughtfully packaged with all parts, tools, and instructions packed into one compact box that ships straight to your door. It can be easily assembled in less than an hour. The Style & Substance foundation comes with a worry-free 5-year warranty. Note that this foundation requires a bed frame or platform bed to support it, which is sold separately.

Pros

  • Stylish design with thick wooden slats and grey fabric panels
  • Durable construction with thick plywood and 2.8 inch wood slats
  • Customizable height with three different profiles available
  • Can support any latex, memory foam, or spring mattress
  • Easy to assemble with all parts, tools, and instructions included
  • Comes with a 5-year warranty

Cons

  • – Requires a bed frame or platform bed to support it, which is sold separately

6. Zinus Split King Metal Box Spring: Strong & Easy.

Experience the convenience of a hassle-free set up with this mattress. Just take it out of the box and watch it decompress before your eyes. You can speed up the process by jumping, walking, or sleeping on it, and within no time you'll have a fully functional and comfortable mattress.

Say goodbye to the tedious and time-consuming task of setting up a mattress. With this product, you can have a comfortable sleeping experience without any hassle.

Pros

  • Hassle-free set up
  • Quick and easy decompression process
  • No need to spend time on assembly

7. Steelwood King Box Spring – Easy Assembly

The Walter box spring is a game-changer when it comes to mattresses. It is built with trusted support that is put into their ever-so-popular platform beds. The foundation is constructed with durable steel and wood slats that can support up to 700 pounds of weight. The twin size can support up to 350 lbs. The interior framework is engineered for lasting durability. The box spring dimensions measure 79'' L x 76'' W x 7.5'' H, while the product dimensions measure 78.94 x 75.67 x 7.5 inches. This foundation is thoughtfully packaged with all parts, tools, and instructions compactly placed in one box that ships straight to your door. Note that the box spring only is included, and a bed frame or platform bed is required to support this foundation, which is sold separately. A worry-free 5-year limited warranty is included.

The Walter box spring offers a superior level of support that provides a comfortable sleeping experience. The closely spaced wood slats and unwavering steel structure are built to last. The foundation is easy to assemble with all parts, tools, and instructions included in the compact box. The 5-year limited warranty included provides customers with peace of mind.

Upgrade your sleeping experience with the Walter box spring. Its durable construction and reliable support make it a wise investment. The compact packaging and easy assembly process make it a hassle-free purchase that will be delivered straight to your door. The Walter box spring is a must-have for anyone looking for a comfortable and supportive sleeping experience.

Pros

  • Durable steel and wood slats construction
  • Supports up to 700 pounds of weight
  • Compact packaging
  • Easy to assemble
  • 5-year limited warranty included

Cons

  • – Bed frame or platform bed required (sold separately)

8. Smart Lock Box Spring: Easy Assembly, King Size

Introducing the Quick Lock Metal Smart Box Spring, a hassle and headache-free solution for your bed foundation needs. This box spring is designed with easy-to-follow instructions, fewer bolts, and an intuitive assembly process that even defies the laws of physics. The packaging is thoughtfully designed to be compact and ships straight to your doorstep, providing you with everything you need in one box.

The interior framework of this foundation is constructed with a durable steel frame, ensuring its longevity and stability. The twin size can support up to 350 lbs, while all other sizes can support up to 700 lbs. Its low profile design, standing at 4 inches, is perfect for taller mattresses or for those who prefer a lower bed.

This Quick Lock Metal Smart Box Spring also comes with a worry-free 5-year limited warranty, giving you peace of mind. Please note that this product is only the box spring; a bed frame or platform bed is required to support this foundation and is sold separately.

Pros

  • Easy-to-follow instructions and intuitive assembly process
  • Durable steel frame construction ensures longevity and stability
  • Low profile design perfect for taller mattresses or those who prefer a lower bed
  • Worry-free 5-year limited warranty included

Cons

  • – Requires a bed frame or platform bed to support the foundation (sold separately)

9. Zinus Split King Metal Mattress Foundation

The No Assembly box spring is an innovative product that requires zero tedious assembly and no tools. It only requires unfolding to become bedtime ready. The hardest part about setting up this foundation will be taking it out of the box. The product is thoughtfully packaged and all of the parts and instructions are packed into one compact box that ships straight to your door.

This foundation is durably engineered using steel to construct the interior framework. The twin size supports a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs. The King size is a split version. Setting up this foundation is easy; simply unfold and secure the zipper on the cover.

Please note that this box spring only includes the foundation. A bed frame or platform bed is required to support this foundation and is sold separately. A worry-free 5-year limited warranty is included.

Pros

  • Zero tedious assembly required
  • Easy to set up
  • Durable steel construction
  • Compact packaging
  • Worry-free 5-year limited warranty

Cons

  • – Requires a bed frame or platform bed to support

10. Smart Metal Box Spring – King Size

The Smart Box Spring is revolutionary because it is built to last with its solid steel construction. Unlike the traditional box spring, it is designed to be assembled quickly and easily. This product is backed by Zinus' 5-year warranty, which offers peace of mind to its customers. The inside framework of this foundation is durably engineered with steel, providing maximum support of up to 700 lbs for all sizes except twin, which can support up to 350 lbs. The low profile design of 5 inches is ideal for those who prefer lower beds or those with taller mattresses. The product is thoughtfully packaged and shipped straight to your doorstep with all the parts, tools, and instructions included. Please note that this box spring is sold separately and requires a bed frame or platform bed for support.

The Smart Box Spring is the perfect solution for people who are looking for a durable and easy-to-assemble foundation for their mattress. The solid steel construction ensures that it can support a significant amount of weight, while the low profile design is perfect for those who want a more modern look for their bedroom. The product's packaging is thoughtful, and all the necessary components are included in one box, making it easy to assemble. Overall, the Smart Box Spring is an excellent investment for people who want a reliable and long-lasting foundation for their mattress.

Pros

  • Solid steel construction ensures durability and long-lasting support
  • Low profile design is perfect for those who prefer a modern look
  • Easy to assemble with all necessary components included in one box
  • 5-year warranty offers peace of mind to customers

Cons

  • – Requires a bed frame or platform bed for support, which is sold separately

Best King Size Box Spring FAQs

Are there any special considerations when purchasing a king size box spring for a specific type of mattress?

Yes, there are some special considerations that you need to keep in mind when purchasing a king size box spring for a specific type of mattress. Firstly, you need to make sure that the box spring is compatible with your mattress. For example, if you have a memory foam mattress, you will need a box spring that is designed to support this type of mattress. Similarly, if you have a hybrid mattress, you will need a box spring that is designed to support both foam and innerspring mattresses.

Secondly, you need to consider the height of the box spring. The height of the box spring can affect the overall height of your bed, which can impact the accessibility and comfort level of your bed. Therefore, it is important to choose a box spring that is the right height for your mattress and your personal preferences.

Thirdly, you need to consider the quality of the box spring. A high-quality box spring will provide better support and durability, which can extend the lifespan of your mattress. Therefore, it is important to invest in a good quality box spring that is designed to meet your specific needs.

In summary, when purchasing a king size box spring for a specific type of mattress, you need to consider the compatibility, height, and quality of the box spring. By taking these factors into account, you can ensure that you choose the right box spring that will provide the best support and comfort for your mattress.

Can a king size box spring be used with a platform bed?

Yes, a king size box spring can be used with a platform bed, but it depends on the design of the platform bed. A platform bed is usually designed to support the mattress without the need for a box spring. However, some platform beds may have additional slats or support systems that can accommodate a box spring. It is important to check the specifications of the platform bed before deciding whether a box spring can be used. Additionally, using a box spring with a platform bed may affect the overall height of the bed, so it is important to consider this when choosing bedding and furniture pieces. Ultimately, the decision to use a box spring with a platform bed depends on personal preference and the specific design of the platform bed.

What are the dimensions of a standard king size box spring?

A standard king size box spring typically measures around 76 inches in width and 80 inches in length. However, it is important to note that the exact dimensions of a king size box spring may vary slightly depending on the manufacturer and specific model. Additionally, the height of the box spring can also vary depending on the thickness of the mattress being used. In general, a standard king size box spring will be around 9 inches in height. It is always a good idea to measure your bed frame and mattress before purchasing a box spring to ensure proper fit and compatibility. Investing in a high-quality box spring can help provide additional support and prolong the lifespan of your mattress, ultimately leading to a more comfortable and restful sleep.

What is the weight capacity of a king size box spring?

The weight capacity of a king size box spring varies depending on the manufacturer and the materials used. Generally, a standard king size box spring can support up to 600 pounds. However, some box springs may have a higher weight capacity of up to 1000 pounds or more. It is important to check the weight limit specified by the manufacturer before purchasing a box spring to avoid any damage to the bed or injury to the user. It is also advisable to distribute the weight evenly across the box spring to prevent any sagging or damage. Additionally, it is recommended to use a sturdy bed frame that is capable of supporting the weight of the box spring and mattress. Overall, investing in a high-quality box spring with a suitable weight capacity can enhance the durability and comfort of your bed.

What materials are commonly used in making king size box springs?

King size box springs are typically made from a combination of wood, metal, and fabric. The frame of the box spring is often made from wood, which is sturdy and durable enough to support the weight of a mattress and its occupants. The wood used may be hardwood or softwood, depending on the manufacturer and the desired level of support.

Metal is also commonly used in the construction of king size box springs. This may include steel or other alloys that are strong enough to withstand the weight of the mattress and any additional weight placed on top.

The fabric used in the construction of king size box springs is typically a blend of cotton or polyester. This fabric is used to cover the wood and metal frame, providing a soft surface for the mattress to rest on. It may also include padding or foam to provide additional cushioning and support.

Overall, the materials used in the construction of king size box springs are designed to provide a strong, sturdy support system for your mattress, ensuring a comfortable and restful sleep experience.

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