Feeling compressed in bed can really cramp your style. It’s not relaxing, which is the No. 1 reason that investing in the best king-size mattress for your space is a must for many people. Especially couples. 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 offer a lot of 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:
These reflect MSRP or list prices. Sales might make a mattress less expensive, but are always changing.
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.
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 offers
- Taller 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
|Standard king (aka Eastern king)||76 by 80 inches|
|California king||72 by 84 inches|
|Split king||Two twin beds (36 by 80 inches)|
|Split California king||Two twin XL beds (36 by 84 inches)|
|Alaskan king||108 by 108 inches|
|Wyoming king||84 by 84 inches|
|Texas king||80 by 98 inches|