Are you looking for best king size foundations, we’ve consulted top experts who has in-and-out knowledge about the king size foundations. We choose the top most quality product, which comes with amazing features you’ve never heard before. We have filter more than 100+ of product to give you top 10 list of best king size foundations.

This list is undoubtedly the best king size foundations available in the market today. However, if you don’t want to spend more time on filtering and finding which one is good king size foundations, then you should absolutely go for our Top list of the winner. which comes with all the basic features one could expect in a king size foundations.


Best king size foundations – The Winners!


But these three has some more competitions too, Check out below List of Top 10 best king size foundations.If you are ready to choose a new king size foundations, check out our recommendations for the best king size foundations. But if you’d like to learn more about the various types of king size foundations available and how to choose the right one for you, read on.

List of Top 10 Best king size foundations In Detailed


Bestseller No. 1
ZINUS 9 Inch Smart Metal Box Spring / Mattress Foundation / Strong Metal Frame / Easy Assembly, King
  • THE LAST BOX SPRING YOU’LL EVER NEED - Unlike a traditional box spring, the Smart box spring is made of solid steel that comes together in no time.
  • DURABLY ENGINEERED - Durable steel is used to construct the inside framework of this foundation; twin size supports a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs
  • HIGH PROFILE DESIGN - A 9 inch height is perfect for shorter mattresses or for those who enjoy their bed higher off the floor; For the fastest resolution and to avoid delays, please describe your issue as precisely as possible
  • THOUGHTFULLY PACKAGED - All parts, tools and instructions are packed into one compact box that ships straight to your door
  • Worry-free 5 year limited warranty included; box spring only, a bed frame or platform bed is required to support this foundation and is sold separately
SaleBestseller No. 2
ZINUS SmartBase Tool-Free Assembly Mattress Foundation / 14 Inch Metal Platform Bed Frame / No Box Spring Needed / Sturdy Steel Frame / Underbed Storage, King
  • A ONE-AND-DONE SOLUTION - Why buy both a bed frame and box spring for your mattress. Our sturdy steel SmartBase lets you enjoy the benefits of both; and fear not - this hardworking frame only requires opposable thumbs to set-up
  • NO BOX SPRING NEEDED - Platform is made with heavy steel that replaces your box spring, allowing you to rest your memory foam or spring mattress directly on top; legs have plastic caps to protect your floors
  • DIMENSIONS: 80" W x 76" L x 14" H
  • MAXIMUM WEIGHT CAPACITY: Narrow twin, twin and twin XL sizes support a maximum weight capacity of 750 lbs, while all other sizes up to 1500 lbs
  • UNDERBED STORAGE - Total of 13 inches of clearance space under the frame provides valuable storage room for extra odds and ends
  • QUICK, TOOL-FREE ASSEMBLY - Shipped in one compact box and requires no tools for assembly
  • Worry-free 5 year limited manufacturer warranty included; mattress sold separately
Bestseller No. 3
ZINUS 7 Inch Smart Metal Box Spring / Mattress Foundation / Strong Metal Frame / Easy Assembly, King
  • THE LAST BOX SPRING YOU’LL EVER NEED - Unlike a traditional box spring, the Smart box spring is made of solid steel that comes together in no time and is backed by our Zinus “Peace of Mind” 5 year warranty
  • DURABLY ENGINEERED - Durable steel is used to construct the inside framework of this foundation; twin size supports a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs
  • THOUGHTFULLY PACKAGED - All parts, tools and instructions are packed into one compact box that ships straight to your door
  • Box spring only, a bed frame or platform bed is required to support this foundation and is sold separately
  • Worry-free 5 year limited warranty included
Bestseller No. 4
ZINUS Metal Box Spring with Wood Slats /9 Inch Mattress Foundation / Sturdy Steel Structure / Easy Assembly, King
  • A MATTRESS GAME-CHANGER - Any decent mattress needs a good foundation behind it, and this box spring is one of our best; built with all of the trusted support we put into our ever-so-popular platform beds, this game-changing box spring has the total package - an unwavering steel structure, reliable, closely spaced wood slats and a compact, cleverly developed, well, package
  • DURABLY ENGINEERED - Durable steel and wood slats are used to construct the interior framework of this foundation; twin size supports a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs
  • HIGH PROFILE DESIGN - A 9 inch height is perfect for shorter mattresses or for those who enjoy their bed higher off the floor
  • THOUGHTFULLY PACKAGED - All parts, tools and instructions are packed into one compact box that ships straight to your door
  • Worry-free 5 year limited warranty included; box spring only, a bed frame or platform bed is required to support this foundation and is sold separately
SaleBestseller No. 5
ZINUS 5 Inch Smart Metal Box Spring / Mattress Foundation / Strong Metal Frame / Easy Assembly, King
  • THE LAST BOX SPRING YOU’LL EVER NEED - Unlike a traditional box spring, the Smart box spring is made of solid steel that comes together in no time and is backed by our Zinus “Peace of Mind” 5 year warranty
  • DURABLY ENGINEERED - Durable steel is used to construct the inside framework of this foundation; twin size supports a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs
  • LOW PROFILE DESIGN - A 5 inch height is perfect for taller mattresses or for those who enjoy their bed lower to the floor
  • THOUGHTFULLY PACKAGED - All parts, tools and instructions are packed into one compact box that ships straight to your door
  • Worry-free 5 year limited warranty included; box spring only, a bed frame or platform bed is required to support this foundation and is sold separately
Bestseller No. 6
Zinus Annemarie Solid Wood Bed Support Slats / Fabric-Covered / Bunkie Board, King
  • Strong and Sturdy support for your memory foam, Hybrid, or Spring mattress
  • 6 slats for twin, 9 slats for full, 10 slats for Queen, 12 slats for King
  • Place vertically from head of the bed to foot instead of horizontally for maximum support
  • No assembly required- just remove from Packaging and put in place/ ideal for platform beds, bunk beds, and daybeds
  • Worry-free 5-year warranty
Bestseller No. 7
Zinus Deepak Easy Assembly Wood Slat 1.6 Inch Bunkie Board / Bed Slat Replacement, King
  • Strong and Sturdy 1.6 inch profile wood slat mattress support. Ideal for use with platform beds, bunk beds and daybeds
  • Fast and easy assembly with convenient and compact packaging
  • Offers additional support for spring, hybrid, and memory foam mattresses
  • Foam padded tape is added to the steel frame for noise-free use and non-slip tape on the wooden slats prevents your mattress from moving
  • Dimensions: 75.50'' x 79' 'x 1.60''
  • Worry free 5-year limited manufacturer warranty
Bestseller No. 8
ZINUS Upholstered Metal Box Spring with Wood Slats / 7.5 Inch Mattress Foundation / Easy Assembly / Fabric Paneled Design, King
  • DIMENSIONS: 76" X 79" X 7.5" | WEIGHT: 57 lb
  • DURABLY ENGINEERED - Thick steel interior framework and 2.8 inch wood slats are covered in a durable woven grey fabric; supports any latex, memory foam or spring mattress
  • CUSTOMIZE THE HEIGHT OF THE BED - With 3 different profiles available, you can choose to make your bed as high or low as you like; twin size can support upto 350 lbs, and all other sizes can support upto 700 lbs
  • THOUGHTFULLY PACKAGED - All parts, tools and instructions are packed into one compact box that ships straight to your door; easily assembles in less than an hour
  • STYLE & SUBSTANCE - Designed to keep up with appearances, this metal framed foundation offers a twist on traditional; featuring thick wooden slats, a steel structure and grey fabric panels for an upholstered look that complements your mattress and bed frame
  • Worry-free 5 year warranty included; box spring only, a bed frame or platform bed is required to support this foundation and is sold separately
Bestseller No. 9
Amazon Basics Mattress Foundation / Smart Box Spring for King Size Bed, Tool-Free Easy Assembly - 9-Inch, King
  • Offers the look and functionality of a traditional box spring, but made from steel for longer-lasting durability sturdy enough to support any spring, foam, or hybrid mattress
  • Durable steel frame and horizontal slats provide sturdy, reliable support for any same-size mattress
  • 2-piece fabric top and bottom covers zip securely together for full coverage; cover is removable for spot cleaning
  • Easy Assembly: New frame construction allows for easy assembly in minutes with no tools required
  • Foldable steel frame to be packed in one smart package and faster delivery to your front
  • Measures 9 inches deep; backed by an Amazon Basics 1-year limited warranty
Bestseller No. 10
Leesa King Size Bed Mattress Foundation, Gray
  • Designed and manufactured in the USA
  • Strong & Sturdy: high-quality wood and a center support beam create a solid base for your Leesa or Leesa Hybrid mattress.
  • Beautifully upholstered: our slate Gray twill Fabric foundation cover is made with design in mind to Perfectly pair with your Leesa or Leesa Hybrid mattress.
  • Easy to assemble: four corner pins secure the outer rails, a middle support rail slides into place and covered slats roll out in a seamless piece.
  • Sleep easy with our 5-year limited manufacturer's
Hope this list of the best king size foundations will be helpful for you. Feel free to contact us if you have any questions about our site or our reviews, and we will be happy to help you with your purchasing decisions in any way we can.