The Ultimate Guide to Memory Foam Mattress Thickness

The Ultimate Guide to Memory Foam Mattress Thickness

Bedroom With a Memory Foam Mattress

Whether you like to snooze on a solid surface or sink into luxurious softness, there’s a memory foam mattress for you. Factors like thickness and density can affect how a memory foam mattress feels. Thickness can also affect price, the kinds of sheets you use, and overall comfort. Let us show you how to choose the right thickness for your next memory foam mattress.

Mattress Thickness Chart


Children and adults under 150 pounds can sleep comfortably on a 10-inch memory foam mattress without a problem. We’ve created a quick reference chart based on body weight (lbs) and mattress thickness (in) to help you find your minimum memory foam mattress thickness.

Weight (pounds) Mattress Thickness (inches)
100 and under 6 to 8 inches Shop Now ▸
101 – 150 8 to 10 inches Shop Now ▸
151 – 200 10 to 12 inches Shop Now ▸
201 – 250 12 to 14 inches Shop Now ▸
251 + 15 inches + Shop Now ▸


Memory Foam Thickness and Density

Dense and Thick Memory Foam Mattress

It’s easy to confuse thickness and density when shopping for a mattress. Thickness changes with the amount of layers in a mattress while density refers to how solid these layers are together. For example, thin mattresses typically have one layer of dense support foam with one or two layers of less dense foam, giving the mattress a firm feel overall. Thicker mattresses have more layers of comfort foam on top of the base foam, delivering that floating-on-a-cloud feeling that thick, fluffy mattresses are famous for.

Memory Foam Mattress Price and Thickness

Memory Foam Mattress

Generally, thicker memory foam mattress cost more. Some come with layers of cooling gel foam or denser bases to keep you stable and comfortable while you sleep. Thinner mattresses, like those 8 inches and under, aren’t uncomfortable, but you’ll miss out on the extra padding. Check out our guide on Memory Foam Mattress Pricing to learn more.

Accessibility, Back Pain, and Health Considerations

Memory Foam Mattress Thickness for Accessibility, Back Pain, and Health Considerations

Getting a full night’s sleep can be difficult when you have back pain. Instead of tossing and turning, consider finding a mattress that cradles your back, shoulders, and hips naturally. There’s no one universal mattress thickness that treats pain, but a stable memory foam mattress can keep your back straight and comfortable.

Why Does Thickness Matter?

Memory foam mattress thickness matters because the number of layers inside your mattress can totally affect how supportive and comfortable it is. The more weight applied to a memory foam mattress, the more it compresses. So you might want to consider a thicker mattress if you sleep with a partner. In the end, thickness can make the difference between sleeping on a marshmallow and sleeping on bedrock.

What’s the Best Thickness for a Memory Foam Mattress?

Memory Foam Mattress Showing One of the Thickness Options

When choosing a mattress thickness, you should consider how much weight it will support. Couples tend to be more comfortable on thicker mattresses while a petite single sleeper would sleep just as well on a thin mattress. For most people, 10 to 12 inches is plenty of memory foam padding for a comfortable night’s sleep. A mattress in this thickness range won’t make it harder for you to get in and out of bed and will give you enough cushion without sucking you in completely. Generally, if you want firmer memory foam, look to a slightly thinner mattress.

Memory Foam Mattress Layers

Layers Shown on a Memory Foam Mattress

While exact layers vary, most memory foam mattresses are made of the same ingredients. In most mattresses, the bottom layer is made of solid shock-absorbing foam designed to stabilize the rest of the mattress and the softer layers above. Next are transitional layers of memory foam and polyurethane foam. A 10- to 12-inch mattress generally has couple of these layers as padding. Thicker mattresses use an additional layer of cooling gel or textured foam for extra comfort. All of this is wrapped up in a hypoallergenic or quilted cover layer to keep you comfortable and it contained.

Memory Foam Mattresses vs. Mattress Toppers

Memory Foam Mattress Topper

If you want the memory foam experience without buying a new mattress, consider adding a memory foam mattress topper to your sleeping setup. They add firmness and support to your existing mattress, plus they’re easy to clean. Just a simple 1- to 3-inch thick topper can soften up a firm mattress instantly. You can also find cooling gel memory foam toppers that are perfect if you tend to overheat when you sleep.

Your mattress is there for you for every cat nap and lazy Sunday. That’s why it’s so important to find the right mattress for you based on thickness, price, and comfort. For more information on factors like density, size, temperature, and more, check out our Tips on Buying a Memory Foam Mattress.