Best California King Mattress Foundations (April 2024) - Rated by CherryPicks' Experts

At a Glance: Our Top Picks

Top 1

ZINUS 5 Inch Metal Smart Box Spring / Mattress Foundation / Strong Metal Fram...

9.9
CPR Score
Top 2

ZINUS 9 Inch Metal Smart Box Spring / Mattress Foundation / Strong Metal Fram...

9.8
CPR Score
Top 3

ZINUS 7 Inch Metal Smart Box Spring / Mattress Foundation / Strong Metal Fram...

9.7
CPR Score
Tips


Our California King Mattress Foundations Ranking is based on our detailed analysis of 45 California King Mattress Foundations and over 134,492 customer reviews. We have compiled the top 25 Best California King Mattress Foundations you might be interested in and ratings based on product features.

* Cherrypicksreviews.com is reader-supported, Our editor review, and recommend the best products based on extensive data analysis, if you click on the product links, we may earn a commission through qualifying products purchased.

The Best California King Mattress Foundations Rated by CherryPicks

Market Overview
California King Mattress Foundations Reviewed
  • Reviews Analyzed: 134,492 Items
  • CPR Avg. Rating: 8.6 / 10
25 Products Evaluated
  • Highest Price: $972.95
  • Lowest Price: $124.94
  • Avg. Price: $272.99
Price Disclaimer

Top 25 California King Mattress Foundations on Amazon (Verified You can Buy)

ZINUS 5 Inch Metal Smart Box Spring / Mattress Foundation / Strong Metal Frame / Easy Assembly, California King

Zinus
OLB-ABS-5CK
83.0 x 71.5 x 5.0 Inches
44.49 Pounds

Ratings for Zinus (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

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
Product Dimensions :83.0 x 71.5 x 5.0 inches
Show More
Top 2

ZINUS 9 Inch Metal Smart Box Spring / Mattress Foundation / Strong Metal Frame / Easy Assembly, California King

Zinus
OLB-ABS-9CK
83.0 x 71.5 x 9.0 Inches
49.38 Pounds

Ratings for Zinus (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Steel Interior Frame With Knitted Polyester Cover
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
Show More

ZINUS 7 Inch Metal Smart Box Spring / Mattress Foundation / Strong Metal Frame / Easy Assembly, California King

Zinus
OLB-ABS-7CK
83.0 x 71.5 x 7.0 Inches

Ratings for Zinus (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

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
Show More

ZINUS Metal Box Spring with Wood Slats, 9 Inch Mattress Foundation, Sturdy Steel Structure, Easy Assembly, California King

Zinus
AZ-HBBS-9CK
83.2 x 72.0 x 9.0 Inches
65.0 Pounds

Ratings for Zinus (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

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
Show More

Amazon Basics Smart Box Spring Bed Base, 9-Inch Mattress Foundation, Tool-Free Easy Assembly, California King

Amazon Basics
AMZ-9KDBS-CK2
83.0 x 71.0 x 9.0 Inches
40.7 Pounds

Ratings for Amazon Basics (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Cal King size box spring for added comfort and support; can help extend the life of a mattress
Compatible with any spring, memory foam, or hybrid mattress
Show More

Continental Mattress, Split Box Spring Foundations For Mattress, California King Size, White (301B-6/0-3S)

Continental Mattress
301B-6/0-3S
84.0 x 72.0 x 8.0 Inches
60.0 Pounds

Ratings for Continental Mattress (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

EASY TO CARRY: Box spring comes split in two to easily pass through narrow hallways & doors
STRONG AND STURDY: made from strong traditional wood structure, made of light yet dense lumber which prevents the box to loosen up and crack and keeps the mattress in perfect shape
Show More

Classic Brands Instant Foundation Low Profile 4-Inch Box-Spring Replacement, California King

Classic Brands
123001-5070
84.0 x 72.0 x 4.0 Inches
52.0 Pounds

Ratings for Classic Brands (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

72" W x 84" L x 4" H
EASY TO ASSEMBLE: Tools, hardware, and easy to follow instructions are included
Show More

Signature Design by Ashley 10" Mattress Box Spring with Metal Foundation, California King, Black

Signature Design by Ashley
M98X92
77.63 x 82.75 x 10.0 Inches
57.0 Pounds

Ratings for Signature Design by Ashley (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

STURDY METAL CONSTRUCTION: Built to last and designed for durability and longevity, this box spring is constructed of sturdy metal instead of wood. It features a removable fabric cover and rounded corners for added safety
UNIQUE SHIPPABLE DESIGN: The perfect alternative to the standard box spring, it is ready to assemble in the comfort of your home. It features a removable fabric cover and rounded corners for added safety
Show More

Leesa California King Size Bed Mattress Foundation, Gray

Leesa
FCK01US
83.0 x 71.5 x 7.5 Inches
70.0 Pounds

Ratings for Leesa (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

STRONG AND STURDY: Made with high-quality wood and a center support beam
EASY ASSEMBLY: No tools required; Four corner pins secure the outer rails, a middle support rail slides into place, and covered slats roll out in a seamless piece
Show More

Mattress Solution Fully Assembled Wood Low Profile Traditional Box Spring / Foundation for Mattress Set, California King, White/Gold

Mattress Solution
4-Inch
84.0 x 72.0 x 4.0 Inches
1.0 Pounds

Ratings for Mattress Solution (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

STRONG AND STURDY: made from strong traditional wood structure, made of light yet dense lumber which prevents the box to loosen up and crack and keeps the mattress in perfect shape
WORKS WITH ALL MATTRESSES: this box spring is good for all mattresses
Show More
Top 11

Treaton Easy Wood Box Spring/Foundation with Simple Assembly, California King, White

Treaton
8-Inch
83.5 x 71.5 x 7.75 Inches
78.0 Pounds

Ratings for Treaton (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

EASY TO SETUP : Easy to assemble instant foundation is a low cost solution that provides perfect support for all mattress types
The STRONG AND STURDY : Foundation supports heavier mattresses including Memory Foam and Latex and actually increases the mattress's longevity by preventing sagging
Show More

Greaton Easy Wood Box Spring With Simple Assembly, California King, Off White

Greaton
Easy Wood Box Spring
84.0 x 72.0 x 4.5 Inches
1.0 Pounds

Ratings for Greaton (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

EASY TO SETUP : Easy to assemble instant foundation is a low cost solution that provides perfect support for all mattress types
The Strong And Sturdy : foundation supports heavier mattresses including Memory Foam and Latex and actually increases the mattress's longevity by preventing sagging
Show More

Mattress Solution Fully Assembled Wood Split Low Profile Traditional Box Spring / Foundation for Mattress Set, California King, White/Gold

Mattress Solution
4-Inch
84.0 x 72.0 x 4.0 Inches
1.0 Pounds

Ratings for Mattress Solution (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

EASY TO CARRY: Box spring comes split in two to easily pass through narrow hallways & doors
STRONG AND STURDY: made from strong traditional wood structure, made of light yet dense lumber which prevents the box to loosen up and crack and keeps the mattress in perfect shape
Show More
Top 14

Continental Sleep 8-Inch Fully Assembled Split Wood Traditional Box Spring/Foundation for Mattress Set, California King, Beige

Continental Sleep
8-Inch Fully Assembled
84.0 x 72.0 x 8.0 Inches
65.0 Pounds

Ratings for Continental Sleep (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

EASY TO CARRY: Box spring comes split in two to easily pass through narrow hallways & doors
STRONG AND STURDY: made from strong traditional wood structure, made of light yet dense lumber which prevents the box to loosen up and crack and keeps the mattress in perfect shape
Show More
Top 15

Greaton 8" Split Wood Traditional Box Spring/Foundation For Mattress, California King, Black

Greaton
440v-6/0-3S
84.0 x 72.0 x 8.0 Inches
24.0 Pounds

Ratings for Greaton (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

EFFORTLESS CARRYING: The boxspring easily navigates tight passageways and entranceways by splitting in two. Fits through tiny stairwells or tight hallways with ease and you can enjoy it out too.
DESIGNED TO ENDURE: Designed using a solid hardwood brackets made of light yet sturdy element, thus preventing the sheet from bending over and breaking, therefore maintaining the size and shape of the mattress. Box Spring lays under the Mattress.
Show More
Top 16

Mayton 4.5-Inch California King Box Spring/Foundation-Easy Simple Assembly, Durable Strong Wood Structure for Pressure Relief, Mattress Support System, Compact Size for Tight Spaces, White

Mayton
4.5-Inch
83.5 x 71.5 x 4.5 Inches
78.0 Pounds

Ratings for Mayton (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Easy to assemble instant foundation is a low-cost solution that provides perfect support for all mattress types.
Durable, strong wood structure supports even heavier mattresses, including memory foam and latex, and prevents sagging, which increases mattress longevity.
Show More
Top 17

Greaton, 4-Inch Sturdy Box Spring for Mattress Support-Durable and Fully Assembled, Natural Wood Foundation for California King, Black

Greaton
301v-6/0-3lps
72.0 x 84.0 x 4.0 Inches
1.0 Pounds

Ratings for Greaton (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Increased support: Wooden box springs have a natural ability to absorb weight, which can provide additional support for your mattress and distribute your body weight more evenly. This can help reduce pressure points and provide a more comfortable sleeping surface, while also helping to prevent sagging in your mattress over time.
Enhanced durability: Wooden box springs are typically made from durable and high-quality lumber, which can help extend the life of your mattress by providing a stable base that resists wear and tear.
Show More
Top 18

Spring Coil, 4.5-Inch Sturdy Box Spring for Mattress Support-Durable and Easy to Assemble Natural Wood Foundation for California King, White

Spring Coil
Easy Wood Box Spring
83.5 x 71.5 x 4.5 Inches
79.0 Pounds

Ratings for Spring Coil (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
Kentment -

Features

STURDAY MATERIAL: A quality wood box spring provides durable and sturdy support for your mattress, while reducing noise and offering an attractive, eco-friendly option when made from sustainably-sourced wood.
COMPACT PACKAGING: An easy-to-assemble box spring offers convenience and time-saving benefits. It makes moving and rearranging furniture easier and is ideal for those who lack assembly skills or tools. Additionally, compact packaging allows for easy transport and passing through narrow doorways.
Show More

HOMES: Inside + Out 2-inch Bunkie Board/Foundation, , California King

HOMES: Inside + Out
IDF-BUNKIE-CK
84.0 x 72.0 x 2.0 Inches
42.0 Pounds

Ratings for HOMES: Inside + Out (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Overstock 5,181

Features

Easily replaces your current box spring
Sturdy 2-inch North American Lumber slats
Show More
Top 20

Continental Sleep 4-Inch Low Profile Wood Traditional Boxspring/Foundation Set, California king

Continental Sleep
4-Inch
84.0 x 72.0 x 4.0 Inches
69.0 Pounds

Ratings for Continental Sleep (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

EFFORTLESS CARRYING: The boxspring easily navigates tight passageways and entranceways by splitting in two. Fits through tiny stairwells or tight hallways with ease and you can enjoy it out too.
DESIGNED TO ENDURE: Designed using a solid hardwood brackets made of light yet sturdy element, thus preventing the sheet from bending over and breaking, therefore maintaining the size and shape of the mattress. Box Spring lays under the Mattress.
Show More
Top 21

Lucid High-Profile Foldable 9 Inch Steel California King Box Spring Foundation with Center Support Bolts; Cover-Included

LUCID
LU0001FBSCKBK
83.0 x 71.6 x 9.0 Inches
63.0 Pounds

Ratings for LUCID (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Foldable box spring foundation with washable cover; ideal for small spaces and frequent moves
Find superior support with center support bolts for an extra sturdy and durable sleeping space; Minimal assembly required to take advantage of the full durability of the box spring
Show More
Top 22

Boyd Sleep Bonus Base Metal Mattress Foundation, 14" Height, Black, California King

Boyd Sleep
AMZBBB112CK
83.0 x 71.0 x 14.0 Inches
44.0 Pounds

Ratings for Boyd Sleep (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

SUPPORT & DURABILITY: Engineered and constructed with 100% anodized steel and center leg support. Compact design makes it easy to transport and store in narrow spaces, hallways, doorways and more.
PROFILE & ASSEMBLY: Sits 14" above the floor to provide additional storage space and easy under-bed cleaning. Eliminates the need for a bed frame or box spring. Easy, quick assembly, usually under 20 minutes.
Show More

Greaton, 4.5-Inch Sturdy Box Spring for Mattress Support-Durable and Easy to Assemble Natural Wood Foundation for California King, White

Greaton
5100v-6/0
83.5 x 71.5 x 4.5 Inches
78.0 Pounds

Ratings for Greaton (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

STURDAY MATERIAL: A quality wood box spring provides durable and sturdy support for your mattress, while reducing noise and offering an attractive, eco-friendly option when made from sustainably-sourced wood.
COMPACT PACKAGING: An easy-to-assemble box spring offers convenience and time-saving benefits. It makes moving and rearranging furniture easier and is ideal for those who lack assembly skills or tools. Additionally, compact packaging allows for easy transport and passing through narrow doorways.
Show More

Greaton, 8-Inch Sturdy Box Spring for Mattress Support-Durable and Easy to Assemble Natural Wood Foundation for California King, White

Greaton
5200v-6/0
83.5 x 71.5 x 7.75 Inches
78.0 Pounds

Ratings for Greaton (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

STURDAY MATERIAL: A quality wood box spring provides durable and sturdy support for your mattress, while reducing noise and offering an attractive, eco-friendly option when made from sustainably-sourced wood.
COMPACT PACKAGING: An easy-to-assemble box spring offers convenience and time-saving benefits. It makes moving and rearranging furniture easier and is ideal for those who lack assembly skills or tools. Additionally, compact packaging allows for easy transport and passing through narrow doorways.
Show More

Irvine Home Collection California King Adjustable Bed Base, Zero Gravity, Anti-Snore, Programmable Memory Positions, Full Body Massage, USB, Premium Build, Grey, ABCK

Irvine Home Collection
ABCK
84.0 x 72.0 x 8.5 Inches
185.0 Pounds

Ratings for Irvine Home Collection (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

NATIONWIDE WARRANTY SERVICE - Included with our adjustable bed is a nationwide service number that can assist you on product warranty claims and repairs.
Product Dimensions :84.0 x 72.0 x 8.5 inches
Show More

Top 10 California King Mattress Foundations - Verified to Buy (Apr. 2024)

Top 10 California King Mattress Foundations Brands on Amazon

Here is the list of top-rated brands that were evaluated by CherryPicks.

  • Zinus
  • Amazon Basics
  • Continental Mattress
  • Classic Brands
  • Signature Design by Ashley
  • Leesa
  • Mattress Solution
  • Treaton
  • Greaton
  • Continental Sleep

Related California King Mattress Foundations Guides

For more personalized California King Mattress Foundations guides, Check those pages,


Top 6 California King Mattress Foundations Sellers: CPR Seller Rank List

CPR sellers rank is based on CherryPicks-AI bestselling ranking system that helps us analyze each seller's sales trends. The List of top seller ranks is our in-house data, essential for our product ranking to help you make the right shopping choice.

  • 1. Overstock : 1,010 Yearly Feedback , Avg. Ratings 4.1
  • 2. Amazon.com : 385 Yearly Feedback , Avg. Ratings 4.7
  • 3. Kentment : 299 Yearly Feedback , Avg. Ratings 4.6
  • 4. STORE-16 : 10 Yearly Feedback , Avg. Ratings 3.3
  • 5. STORE-0022 : 3 Yearly Feedback , Avg. Ratings 4.7
  • 6. STORE-20 : 2 Yearly Feedback , Avg. Ratings 5.0
Rank Name Yearly Feedbacks Avg. Ratings
🥇 Overstock 1,010 4.1
🥈 Amazon.com 385 4.7
🥉 Kentment 299 4.6
4 STORE-16 10 3.3
5 STORE-0022 3 4.7
6 STORE-20 2 5.0
View or download top California King Mattress Foundations seller & rating report
Overstock [1010] Amazon.com [385] Kentment [299] STORE-16 [10] STORE-0022 [3] STORE-20 [2] Overstock 59% Amazon.com 23% Kentment 17% STORE-16 1% STORE-0022 0% STORE-20 0%

[Get] California King Mattress Foundations Deals (✅Exclusively for Prime)

What does "Amazon Fulfilled" Mean?

Amazon Fulfilled refers to products handled by Amazon's logistics, which indicates that the product is stored, packed, and shipped by Amazon from one of its fulfillment centers.

When you order a product that is "Amazon Fulfilled," Amazon takes care of the storage, packing, shipping, and customer service for that product. This often ensures quicker delivery and better customer service compared to products that are not fulfilled by Amazon. It also means that the product is eligible for Amazon's return policy.

What does "Prime" Mean?

"Prime" refers to Amazon Prime Member (Join Amazon Prime Now), which indicates eligibility for Prime benefits. When you see "Prime" next to a product on Amazon, This generally means that if you are  an Amazon Prime member, you can get free two-day shipping on that product, and sometimes even same-day or one-day shipping depending on your location.

Prime members also have access to other benefits, including 2-Day ShippingExclusive Member DealsPrime VideoBuy With PrimeAmazon MusicPrime Gaming, and more.

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What does "Free Shipping" Mean?

"Free Shipping" means that you will not be charged additional fees for the shipping of that product. However, unlike "Prime," which usually guarantees fast two-day shipping, "Free Shipping" doesn't necessarily mean fast shipping.

Sometimes there might be a minimum purchase requirement to qualify for free shipping if you are not a Prime member. For Prime members, the "Free Shipping" usually refers to the free two-day shipping that is one of the benefits of the Prime membership.


Why Should You Trust Us?

Now hundreds and thousands of Furniture supplies are available on Amazon, Picking the right one is not easy, and that may take a lot of your time, Right? and What is the best California King Mattress Foundations to buy for new April 2024?

CherryPicks’s Methodology for Evaluating California King Mattress Foundations

We developed the CherryRatings-AI system to identify and score reviews and the CherryPicks-AI ranking system that uses TensorFlow framework to generate the best list, It will help us evaluate Furniture items that sell on Amazon. The score of items is based on over ten parameters such as analyzing customer review content, product reviewing rating statistics, brand reputation evaluation, comparing product price with features, etc, You can visit How We Rank to learn more in detail.

We collected and analyzed 45 of California King Mattress Foundations reviews based on our selection criteria. It helped us shortlist the top qualified and rated California King Mattress Foundations for Furniture, We found that most customers choose California King Mattress Foundations with an average price of $272.99, and the top brands are Amazon Basics, Zinus, Generic, Signature Design by Ashley, LUCID, Classic Brands, Artist Unknown, Mayton, Continental Mattress, Continental Sleep, Leesa, Boyd Sleep, Treaton, Greaton, Mattress Solution, Spring Coil, Irvine Home Collection And HOMES: Inside + Out. 

Then our expert-level editors reviewed all those quality items and selected the top 25 California King Mattress Foundations for you, We have researched hundreds of sellers and picked the top sellers for Furniture, including Overstock, Amazon.com, Kentment, STORE-20, STORE-005H, STORE-16, STORE-0022 And STORE-0040LUYXY. The ZINUS 5 Inch Metal Smart Box Spring / Mattress ... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 21,372 consumers with an average rating of 4.5.

We've helped a lot of satisfied users get the right Home & Kitchen product based on their needs, and save lots of time for them to pick California King Mattress Foundations to buy.


Written By Joyce C. Foster

Joyce is an editor with us here at CherryPicksReviews. She is an exceptional writer, committed to producing the best content on groceries, and ready to taste some any day anytime. She has got years of experience writing with a popular food blog as a food blogger before joining us here.