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Getting a good night’s sleep is essential to having a productive day. You don’t want to feel compressed in bed — it’s not relaxing. The best way to avoid this is by investing in the best king-size mattress for your space. Whether you go for a king-size mattress, a California king or one of those split king mattresses with dual adjustable bases, these bigger beds will make the best use of your space.
CNET’s sleep editors have tested more than 100 mattresses, and to help you narrow your search, they’ve rounded up some of the best king-size mattress options. Whether you’re looking to upgrade to a king bed, or you need to swap out your current mattress for something more modern, our list of the best king-size mattress models likely has a good match for you.
What is the best king mattress overall?
The best king-size mattress overall should check several boxes. It should be accommodating for a wide range of sleeping positions, body types and have solid edge support and motion isolation for couples who share a bed. The Brooklyn Bedding Signature mattress fits the bill to a tee. Plus, it offers a really good value.
Video: Best king mattress for 2023
Watch CNET Video Producer Owen Poole review the best king mattresses for 2023.
Read more: Best California King Mattresses for 2023
Best king size mattresses of 2023
Mattress price scale:
$ = Budget: $799 and below
$$ = Average: $800 to $1,699
$$$ = Premium: $1,700 and up
These reflect MSRP or list prices. Sales might make a mattress less expensive, but are always changing.
My Slumber Yard
Type Hybrid mattressFirmness 3 firmness levels | Soft: Medium-soft to soft or 2 | Medium: Medium to medium-soft or 4 | Firm: Medium-firm or 7Trial 120 nightsWarranty 10-year limited warranty Price $$
Kinging off our best king size mattress review is the Brooklyn Bedding Signature mattress. It fits the bill for your average sleeper looking for a quality king bed that won’t cost an arm and a leg. What really impressed me about this one, even though this is a high quality hybrid mattress, it costs less than the foam Casper. That’s pretty uncommon since hybrid beds are typically more expensive than all-foam ones, so it offers a really great value.
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Brooklyn Bedding Signature Hybrid
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Lindsay Boyers
Type Hybrid mattressFirmness 3 firmness levels | Plush Soft: Medium or 5 | Luxury Firm: Medium-firm or 7 | Firm: 9/10 or firmTrial 360 nightsWarranty Lifetime warranty Price $$
The Saatva mattress is a luxury bed with an ultra supportive design that you don’t get from every online mattress. It includes two innerspring layers; One layer is a system of extra strong dual coils and another is a thinner layer of pocketed coils for additional support and improved motion isolation.
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Saatva Classic
Jonathon Gomez
You may not be familiar with Allswell, but you’re likely familiar with its parent company Walmart. As its entrance to the bed in a box game, Walmart introduced the affordable Allswell mattress. It’s a hybrid mattress made with both foam and coils, and hybrid beds tend to be a little more expensive than your average bed. However, the Allswell mattress is a good hybrid mattress for the price of a low-budget foam mattress, giving it a well-deserved spot on this best king bed list.
Read more Nectar
Type Memory foam mattressFirmness 5 or mediumTrial 365 nightsWarranty Forever warranty Price $$
The Nectar Premier mattress is the replacement for the mattress company’s upper-level model called Nectar Lush. The Nectar Premier mattress has a thick memory foam construction, giving it a relieving and slow-responding memory foam feel. It takes a few seconds for your body to activate the foam, but once it does, the memory foam slowly contours around your curves and nestles you into the bed.
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Nectar Premier
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Amerisleep
The Amerisleep AS2 Hybrid has a lot going for it and stands out from other competing memory foam bed-in-a-box mattresses. It’s one of the best king mattress picks for people with back pain because of its accommodating features, extra bells and whistles and affordable price.
Read more Jonathon Gomez/CNET
Type Flippable hybrid mattressFirmness Firm: 5 or medium | Soft: 3 or medium-softTrial 120 nightsWarranty 10-year limited warranty Price $$
In a sea of bed-in-a-box mattresses, brands have to add a little sauce to their designs to make them stand out. The Layla Hybrid is unlike most other hybrid mattresses because it comes with a two-in-one deal. What I mean is that it’s flippable, and you can sleep on each side of the mattress comfortably.
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Layla Hybrid
Casper
Type Poly foam mattressFirmness 6 out of 10 or mediumTrial 100 nightsWarranty 10-year limited warranty Price $$
For the best king size mattress that skips the hoopla and offers an affordable value, the Casper Original is a great entry-level option and could also be considered the best king-size foam mattress. It’s incredibly accommodating, comfortable and arguably the most popular bed-in-a-box mattress on the market. It has a simple three-layer construction that boasts a zoned support design, meaning it’s firmer under your back where you need additional support, and pressure-relieving under your shoulders and trunk where your body needs pressure relief.
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Casper Original
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How we test king size mattresses
CNET editors pick the products and services we write about based on editorial merit. When you buy through our links, we may get a commission.
Testing a king mattress is similar to how we test most of our mattresses, and we pay attention to a handful of important factors.
Firmness: The measure of how firm or soft a mattress feels is an important factor in deciding if a bed is suitable for you or not. Firmness, a lot of the time, indicates how pressure relieving or how supportive a mattress feels. Side sleepers usually like a softer mattress because it offers more give, therefore, more pressure relief around the hips and shoulder areas. Back and stomach sleepers, on the other hand, tend to sleep better on firm beds that keep the spine properly supported. We test firmness by using our judgment and deliberating amongst team members. It’s easier to test firmness when you have 100 different mattresses to compare it to.Construction and features: We take a close look at the construction of a mattress, which is a good tell on how it feels and how supportive it is for certain body types. We also consider any extra or special feature a mattress might have to stand out from the rest of the competition. Is it cooling? Does it have a special cover made with Celliant fabric or cashmere? Does it have an extra durable construction? We take all of this into consideration when testing mattresses and delegating best list picks. Performance: This refers to motion isolation, temperature regulation and edge support abilities. How well does a mattress perform when we put it to the test? We test motion isolation by having couples judge how it sleeps, or placing a glass of water at the end of the bed to see how much it shakes when we move. Edge support is tested by laying on the sides, bouncing and checking how sturdy it feels. Personal experience is also how we test temperature, with the help of a thermometer gun. Feel: Feel is a separate topic from firmness. This refers to how a mattress’ materials are perceived. Is it dense and morphy like memory foam, neutral and soft like neutral-foam, or supple and bouncy like latex foam? We like to describe the feel as best we can since you’re unable to feel it through your computer screen.
Read more on how we test mattresses.
What to look for in a king mattress
When looking for the best mattress, you should take in some key considerations. You should follow the same guidelines when looking for a king-size bed, with a few key considerations.
Hybrid vs. foam: The more you weigh, the more supportive your mattress should be. Hybrid beds are best for all body types, including those over 230 pounds, while foam beds are most ideal for people under 230 pounds. Firmness is a key indicator for how accommodating a bed will be. One of the first things to think about while looking for the best king mattress is firmness. Are you a side sleeper, back sleeper or stomach sleeper? Side sleepers typically need softer mattresses, while back and stomach sleepers benefit from a firmer mattress, because having a firm bed will help support the spine, decreasing back pain. Medium beds right in the middle are perfect for combination sleepers. Key features like cooling tech, edge support reinforcements and Celliant covers can help you decide if a bed fits your lifestyle and circumstances. Strong edge support is great for couples who share a mattress, while beds with Celliant covers are perfect for people with active lifestyles. Price matters when looking for a king bed. The bigger the bed the more expensive it is. King beds are often more than $1,000, but there are budget options like Allswell to consider if you’re looking for maximum savings.
Check out our size guide to compare mattress sizes. And if you’re looking to upgrade your whole sleep setup, we have suggestions for sheets, pillows and other sleep essentials.
Who is a king mattress best for?
Not everyone needs a king-size bed, but it is mighty convenient and comfortable during these situations:
Couples who want more space than a queen size offersTaller people who don’t want to feel cramped (queen beds are about 6.6 feet long)Sleepers who share a bed with their kids (king beds are wider than California king beds)
King and California king mattresses are the most popular of the king variety, but there are a host of beds that are technically classified as king. Here’s an overview of the different types of king beds if you’re looking for something a little different.
King-size mattress types TypeDimensions Standard king (aka Eastern king) 76 by 80 inchesCalifornia king 72 by 84 inchesSplit king Two twin beds (36 by 80 inches)Split California king Two twin XL beds (36 by 84 inches)Alaskan king 108 by 108 inchesWyoming king 84 by 84 inchesTexas king 80 by 98 inches King-size mattress FAQs
How much does a king-size mattress cost?
The average king mattress costs around $1,000 or more, depending on how premium of a mattress you’re looking to buy. However, there are more affordable options available for around $500 for budget shoppers who are looking to pay a little less.
How big is a king-size mattress?
A king-size mattress measures out to 80 inches long by 76 inches wide and 4 inches thick. Compared to a queen-size mattress, it offers the same length but 16 more inches in width.
What is the best king-size mattress?
Typically, the best king-size mattress is a bed that’s able to accommodate two sleepers because it’s the most popular size among couples. Some of the best king beds have pocketed coils and reinforced edge support, can isolate motion well, and/or have a breathable design. Some of CNET’s picks include:
Brooklyn Bedding SignatureSaatva ClassicNectar Premier Layla HybridAmerisleep AS2 HybridAllswell Casper Original
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