Best King Size Mattress For Your Dream Bedroom 2023

Want a little more room while you sleep? It’s time to start looking for the best king mattress to add to your bedroom. While the 16-inch difference between a queen and a king mattress may seem insignificant, that space can make a huge difference in your quality of sleep each night, especially if you share the bed with a partner, pets, or kids. Before choosing a king mattress, it’s important to check that your bedroom can comfortably fit a king-size bed, which measures 76” wide and 80” long. Also, start thinking about how you sleep and what sort of bed would best suit your needs. For example, a firmer mattress helps both stomach and back sleepers with lumbar support, while soft mattresses yield more cushion for side sleepers. The This Old House Reviews Team and Mattress Advisor’s testing team worked together to compile a list of best king mattresses from top-rated online brands. Keep reading to see which is the best option for you.

Best King Mattresses - Our Top Picks

Saatva Classic - Best Overall King Mattress Helix Midnight - Best King Mattress for Side Sleepers WinkBeds Original - Most Comfortable King Mattress Brooklyn Bedding Plank - Best Extra-Firm King Mattress Puffy Original - Best King Mattress for Pressure Relief DreamCloud Premier - Best Luxury King Mattress Nectar Original - Best Value King Mattress Layla Memory Foam - Best Flippable King Mattress PlushBeds Botanical Bliss - Best Latex King Mattress

Saatva Classic - Best Overall King Mattress

Material: Hybrid (foam and coils) Firmness: Soft (3/10), luxury-firm (6/10) and firm (8/10) Customer Rating: 4.9/5 Delivery: 9-21 days, free white glove delivery Trial: 365 nights Warranty: Lifetime

Boasting three firmness levels to choose from, white glove delivery, and solid test scores from Mattress Advisor, it’s easy to see why the Saatva Classic took the crown as the best king mattress. You can rest easy after making this purchase knowing it’s one of the most durable mattresses tested by our assessors, as it scored a perfect 10 out of 10 in durability. Layers of steel coils provide great support and pressure relief (8.75 out of 10) while helping to make this bed cool and breathable (9 out of 10). This hybrid mattress is constructed with back and edge support layers to help maintain healthy posture no matter how (or where) you sleep on the bed. A quilted Euro pillow-top supplies an additional measure of comfort and cushioning. All Saatva mattresses come with complimentary white glove delivery, so replacing your old mattress will be a cinch.

Helix Midnight - Best King Mattress for Side Sleepers

Material: Hybrid Firmness: Medium (5.5/10) Customer Rating: 4.5/5 Delivery: 3-7 business days Trial: 100 nights Warranty: 15-year limited

Side sleepers face the most risk of experiencing joint pain around the hips and shoulders, since this sleep position pushes tension on these areas. While a soft mattress might seem like a surefire answer, without proper lumbar support, back pain becomes a risk as well. Pressure relief and spine alignment are the two most important features side sleepers need from their mattress––and the medium firmness and polyfoam layer of the Helix Midnight accomplishes just that. A high score of 8.75 out of 10 in spine alignment keeps your spine in a natural position as you lie down, and makes this bed a good choice for those with back pain. A high score in pressure relief (8.5 out of 10) means this bed helps alleviate tension and cradle pressure points. Those who sleep near the perimeter of the mattress can do so comfortably––this bed scored a 10 out of 10 in edge support. All foam layers used in this American-made mattress are CertiPUR-US certified, meaning that you won’t come into contact with any harmful chemicals.

WinkBeds Original - Most Comfortable King Mattress

Material: Hybrid Firmness: Soft (4.5/10), luxury-firm (6.5/10), firm (7.5/10), plus (8/10) Customer Rating: 4.5/5 Delivery: Within 7-14 business days Trial: 120 nights Warranty: Lifetime

Those who want a little more customization will love the number of firmness options offered by WinkBed. Customers can select one of four available firmness levels to get the most comfortable night’s sleep possible. This mattress received a notable 9 out of 10 in responsiveness, which means sleepers can move without feeling stuck in the bed––crucial for combination sleepers. This bed has a designated “comfort layer” that works to isolate motion, which is a huge perk for couples and restless sleepers. A lumbar-support pad provides lower back support for reduced tension, which helps maintain healthy spine alignment (8.75 out of 10). The WinkBed is made of eco-friendly materials including CertiPUR-US certified foams, making this bed super durable and long-lasting (it scored a 10 out of 10 in durability).

Brooklyn Bedding Plank - Best Extra-Firm King Mattress

Material: Polyfoam Firmness: Firm (7/10) and extra-firm (9/10) Customer Rating: 4.8/5 Delivery: 3-4 business days Trial: 120 nights Warranty: 10-year

A firm mattress isn’t for everyone, but there are those who prefer a super firm sleep surface. The Plank by Brooklyn Bedding is the best king size mattress for the job. This dual-sided mattress has two firmness levels: one side for those who prefer a firm bed, and another side that’s even firmer. The extra-firm side is a 9 out of 10 on the firmness scale, providing outstanding pressure relief (9 out of 10) and spine alignment (8.75 out of 10) for back and stomach sleepers. The Plank’s high-density foam layers are highly durable and have good motion isolation that is helpful for couples. While the Plank does excel with pressure relief, it is better suited to stomach and back sleepers, as side sleepers will likely need a softer bed to better cushion their shoulders and hips while they sleep.

Puffy Original - Best King Mattress for Pressure Relief

Material: Memory foam Firmness: Medium-firm (7/10) Customer Rating: 4.6/5 Delivery: Ships free within 2-5 business days Trial: 101 nights Warranty: Lifetime

Memory foam beds are a great choice for those who want a little extra pressure relief for their joints. Crafted with three layers of foam, the Puffy Original mattress molds around areas in your body that could use a little extra comfort, such as your hips, knees, shoulders, and back (8 out of 10). A high score in spine alignment (8.75 out of 10) means this bed helps you maintain a healthy posture even as you sleep. An impressive motion transfer score (9.25 out of 10) makes this cooling mattress a good choice for couples. With this mattress, you shouldn’t feel your partner’s movements. The gel-infused memory foam layer on top helps keep sleepers cool, which can be difficult to come by in memory foam beds.

DreamCloud Premier - Best Luxury King Mattress

Material: Hybrid (foam and coils) Firmness: Medium-firm (6.5/10) Customer Rating: 4.6/5 Delivery: Within 18-21 business days Trial: 365 nights Warranty: Lifetime

It’s okay to enjoy the finer things in life, especially if one of those “things” is somewhere you spend nearly one-third of your time. The DreamCloud Premier is a luxury hybrid mattress with a variety of support layers for the ultimate sleep experience. The DreamCloud Premier’s plush Euro-style pillow top and memory foam layers work to give you unparalleled cushioning support (9 out of 10 for pressure relief). The cashmere cover is luxuriously soft and works with the pocketed coil system to keep you cool as you sleep (8.5 out of 10 for cooling). The DreamCloud Premier is best for combination sleepers and couples. Combination sleepers will love the high responsiveness this bed provides (9 out of 10). And couples will benefit from the incredible motion isolation offered by the layers of memory foam in the DreamCloud Premier (9 out of 10), which helps you stay asleep if your partner moves or gets up in the middle of the night.

Nectar Original - Best Value King Mattress

​​Material: Gel memory foam Firmness: Medium-firm (6/10) Customer Rating: 4.8/5 Delivery: 2-5 business days Trial: 365 nights Warranty: Lifetime

Getting yourself a new mattress doesn’t need to be overly pricey, the Nectar Original mattress proves you can buy a quality bed without spending loads of cash. This bed offers great pressure relief (8.5 out of 10) for the cost, easing some of your tension without emptying your rainy day funds. Superb edge support (9 out of 10) allows full utilization of the bed, including the perimeter. Five layers of foam work in tandem to deliver even weight distribution, support in high-pressure areas, and a comfortable night of sleep. Couples will benefit from the good motion transfer (8.5 out of 10), meaning you won’t be woken if your partner gets up or tosses and turns in the night. This is one of the best memory foam beds you can get at this price point.

Layla Memory Foam - Best Flippable King Mattress

Material: Memory foam Firmness: Medium-soft (4/10) and medium-firm (7/10) Customer Rating: 4.5/5 Delivery: Ships free within 4-8 business days Trial: 120 nights Warranty: Lifetime

Choosing a single firmness for your mattress can be difficult, especially for combination sleepers, couples, and those who aren’t quite sure what they prefer. The Layla memory foam bed contains two firmness levels you can flip between: medium-soft and medium-firm, so you can alternate your sleeping surface whenever you want. Combination sleepers will benefit from the exceptional responsiveness of this flippable mattress (9.5 out of 10), allowing them to easily change positions or shift around. The memory foam layers hug your body’s contours and provide good pressure relief (9 out of 10) to help reduce aches and pains. Side sleepers with broader hips and shoulders will love the plush foam on the softer side that allows them to comfortably sink into the mattress while maintaining good spinal posture. However, back and stomach sleepers can enjoy the support offered on the firmer side.

PlushBeds Botanical Bliss - Best Latex King Mattress

Material: Latex Firmness: Customizable Customer Rating: 4.9/5 Delivery: Ships free in 7-9 days Trial: 100 nights Warranty: 25-year

Two words for couples and co-sleepers: dual adjustability. The PlushBeds Botanical Bliss is a latex mattress that offers completely customizable firmness, and the king-size model boasts split layers, providing each side of the bed with its own adaptive firmness. If you prefer soft and your partner prefers firm, this bed is a perfect option where neither of you need to compromise comfort. Great spinal alignment (8.75 out of 10) ensures proper posture as you sleep, and the latex foam construction keeps you cool throughout the night (8 out of 10 in cooling). Latex is eco-friendly and naturally hypoallergenic, making this a great choice for those with sensitive skin or pets. The PlushBeds Botanical Bliss comes with medium and firm firmness levels, but you can adjust the firmness further by rearranging the internal layers. MA Score: The Mattress Advisor Score is a weighted score that takes into account 14 different factors related to the mattress’ performance, function, convenience, and the brand’s social responsibility.

Who Should Purchase a King Mattress?

Maybe you’ve just moved into a new home and finally have a big bedroom, or maybe you sleep hot and need a little more space to spread out away from your partner because they radiate heat. King mattresses are great purchases for couples who could use a little more room, those who sleep with pets or children, or anyone who craves a sleep experience that’s a little more luxurious than what a queen bed can offer. Finding the best mattress for your needs can make a huge difference in the quality of your sleep.

King Mattress Construction

Memory foam: Ultra-cushioning and great for pressure relief, the comforting contouring of a memory foam mattress is a great option for those who like to feel like they’re sinking into the bed. They do tend to trap body heat, so hot sleepers would be better off with a cooler mattress made from coils or latex. Innerspring: Constructed with a system of innerspring coils, these mattresses are bouncy and springy. They offer great support and usually sleep cool. Latex: Known for being hypoallergenic and eco-friendly, latex beds work well for sleepers with allergies. These beds are also great for hot sleepers. Hybrid: Hybrid mattresses mix and match a number of mattress types, which creates beds that are both supportive and cushioning. The versatility of hybrid beds makes them a good choice for sleepers of all types.

Performance Factors

Set-up: Before you get a new bed, you’ll want to consider what the unboxing process looks like. Is it too heavy to move yourself? Does your purchase come with white glove delivery (in-home setup and old mattress removal)? Because king mattresses are heavier than any other size, it may be worthwhile to splurge on white glove delivery if it’s not already included in your purchase. Lugging a heavy mattress around can be quite the challenge if you don’t have assistance. Pressure relief: If you have joint issues you may want to pay close attention to beds that boast good pressure relief. Pressure relief helps reduce and relieve tension in areas like your hips, shoulders, and back. Spine alignment: Maintaining good posture while you rest is an important part of waking up without feeling back pain and aches. Mattresses with good spine alignment work to keep your spine in a natural position. Durability: Mattresses made with higher-quality materials tend to outlast those that are made with lesser-quality materials. Motion transfer: Isolating motion is a key factor if you sleep with another person or pet and want to keep disruptions to a minimum. A mattress with good motion transfer helps reduce how much movement you feel when your partner shifts or moves. Temperature regulation: Those who overheat while sleeping will want to seek out a mattress with good breathability and airflow to keep them cool at night. Responsiveness: Move around a lot when you are asleep? You need a mattress that will move with you to keep you supported. Bouncier beds like latex and innerspring mattresses are well-suited for this. Edge support: Do you find yourself sleeping at the edge of your mattress? If so, you’ll need good edge support. This denotes the structural integrity of the mattress, ensuring the outermost edges are able to support your weight and won’t sag. Price: The cost of a new mattress can vary incredibly, from affordable quality mattresses that can fit any budget to luxury beds that can cost twice as much. Brands such as Casper and Nectar make more budget-friendly mattress options, while Saatva and GhostBed are more expensive and luxurious options. Most beds have available payment plans to help you get the mattress you want without blowing your budget. Shipping and Delivery: When you buy a mattress online, it’s likely that it will ship and arrive at your doorstep within several business days. One plus of purchasing a “bed-in-a-box” online is that it arrives in a compact box, making it easier to bring it into your home and bedroom. If you would like assistance in your mattress setup, look for white glove delivery that provides the setup for you. This is a great option if you live alone, up a flight of stairs, or do not want to deal with the hassle of setting up and removing mattresses. What are the dimensions of a king-size mattress? The dimensions of a standard king-size mattress are 76 inches wide by 80 inches long. A king mattress is nearly a perfect square. What’s the difference between a king mattress vs a queen mattress? Both king and queen mattresses are 80 inches long, but where a king bed is 76 inches wide, a queen-size mattress is 60 inches wide, giving co-sleepers and couples significantly less space to share. How long should a king mattress last? Typically, a new mattress should last somewhere around 7-10 years, though there are several factors that can change this. The amount of body weight pressing into the bed, as well as the materials the mattress is made of are both elements that can shorten or extend the lifespan of a mattress.

Summary of Our Top Picks for the Best King Mattress

Saatva Classic - Best Overall King Mattress Helix Midnight - Best King Mattress for Side Sleepers WinkBeds Original - Most Comfortable King Mattress Brooklyn Bedding Plank - Best Extra-Firm King Mattress Puffy Original - Best King Mattress for Pressure Relief DreamCloud Premier - Best Luxury King Mattress Nectar Original - Best Value King Mattress Layla Memory Foam - Best Flippable King Mattress PlushBeds Botanical Bliss - Best Latex King Mattress