How Much Does a Quartz Countertop Weigh?

Here, you’ll find out how much does a quartz countertop weigh, including weight per square foot & per slab, and how to tell whether your cabinets will support this amount of weight.
Kitchen with quartz island countertop steel chair green cabinets range-hood

Quartz countertops are a beautiful addition to any home, and they offer a lot of benefits. For instance, you can rely on granite to provide you with the aesthetic appeal of stone while also giving you a durable surface that isn’t prone to cracking or chipping.

You can even rely on it to stay tidy since it’s a non-porous material that won’t stain as easily as a porous material like granite

On the other hand, you do have to consider how heavy stone slabs can be when you’re adding them to your own kitchen. Here, we’ll break down everything you need to know about the weight of quartz countertops and how to tell whether your cabinets will support them.

How Much Does Quartz Weigh per Square Foot?

Quartz square blocks

Everyone’s kitchen is a little different, which can make it hard to make a definitive statement as to how much a quartz countertop will generally weigh. Instead, it’s easier to break down the weight of quartz per square foot to get a better idea. 

When evaluating the weight of quartz per square foot, thickness is a crucial factor. A thicker slab will naturally weigh more than a thinner one of the same area.

So, we’ll start with an average thickness for a quartz countertop. The most common measurement for this is 3 centimeters or 1 ¼ inches for the thickness of a countertop. With this measurement in mind, you can expect a weight of about 18 pounds per square foot

If you opt for a slightly thinner countertop, use a stone slab 2 centimeters or about ¾ inches. This will give you a weight per square foot of about 12 pounds

How Much Does a Slab of Quartz Weigh?

Quartz slab weight

The weight of a slab of quartz depends on its size. After all, the more stone there is, the more that a certain slab will weigh. This, of course, is not only the width and length of the slab but the thickness as well. As mentioned, a thicker slab will naturally weigh more. 

One fairly standard size for quartz slabs is about 120 inches by 55 or 56 inches with a thickness of three inches. If you stay around these measurements, you can expect a weight of 639 to 675 pounds. However, this weight may vary slightly.

Do Quartz Countertops Weigh Less Than Granite?

Another option that many people consider when they’re looking into stone countertops is granite. As such, it’s worth taking a second to compare the two options. While they have some other similarities and differences, for the purposes of this guide, we’ll focus on the weight differences between granite and quartz

One factor that plays heavily into this is density. After all, if one material is denser than the other, the same amount of that material will also be heavier than the other.

As far as density goes, quartz measures in at 2.65 grams per cubic centimeter, but granite is the denser choice with a varying measurement of around 2.7 or 2.8 grams per cubic centimeter. 

Because of this difference in density, granite can be slightly heavier than quartz, although not by much. However, since this difference in density is such a small margin, you probably won’t notice a significant difference in the weight of two of the same-sized slabs when comparing them directly. See our comparison guide on quartz vs granite countertops here.

Will My Cabinets Support Quartz Countertops?

Kitchen island with quartz countertop stools stainless refrigerator white cabinets

The weight of quartz countertops, quite literally, falls on your cabinets. They’re what’s holding your countertop up, so they have to be able to handle the weight. In that case, how do you know that your cabinets can hold up your new stone countertops?

The good news is that most modern kitchen cabinets are strong enough for these engineered stone slabs, and it’s even a commonly used material for kitchen countertops. That being said, if your cabinets are particularly old or worn, you might have to consider if those damages could cause a problem. 

The best thing to do is consult with a contractor to review the details of a possible installation. They should be able to give you any information you need about the installation, including details like the integrity of your cabinets.

In all, quartz countertops offer a lot of benefits and offer a distinct aesthetic appeal as well. They can have a weight that seems staggering compared to lighter countertop materials but most modern kitchens are more than capable of handling the weight

For more content related article, see our gallery of quartz backsplash kitchens here.

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