How Thick is Quartz Countertop? The Complete Guide

Quartz countertops have become an increasingly popular option for kitchen and bathroom remodeling projects in recent years. Known for their durability, low maintenance, and wide range of colors and patterns, quartz offers homeowners a high-end look with none of the hassles of natural stone. But before installing quartz counters, an important consideration is how thick the slabs should be. Here is a complete guide to understanding quartz countertop thickness.

What is the Standard Thickness for Quartz Countertops?

The standard thickness for quartz slabs is 3/4 inch (1.9 cm). This thickness is suitable for most residential applications, including kitchen countertops and bathroom vanities. 3/4 inch gives quartz the heft it needs to stand up to years of daily use without sagging or warping. It provides an elegant substantial feel that maintains the sturdiness of natural stone without the fragility.

For heavy duty commercial projects, a thicker 1 1/4 inch (3.2 cm) quartz slab may be used. But for most homeowners, 3/4 inch standard thickness offers the ideal combination of sleek aesthetics and rock-solid durability.

Factors to Consider When Choosing Quartz Thickness

When selecting the right thickness for your quartz countertop, here are some important factors to take into account:

Span Length

The distance between supports like cabinets or walls underneath the countertop is called the span length. Longer spans may require a thicker slab to prevent bending or cracking over time. Many manufacturers recommend a 1 inch thick quartz countertop for spans exceeding 36 inches.

Overhang Length

The overhang refers to the part of the countertop that extends beyond the cabinet or support. Standard overhangs are about 1-1/2 inches. For overhangs extending 3 inches or longer, a thicker quartz material provides added stability.

Level of Use

In high traffic areas like a busy kitchen, a thicker quartz surface is more durable. For low use bathroom vanity tops, standard thickness often suffices.

Type of Edge Detail

Fancy edge profiles like bevels or ogees remove some material, so a thicker slab maintains strength. A minimal bullnose edge doesn’t impact thickness as much.

Built-in Appliances

Countertops with heavy built-in appliances like cooktops benefit from a thicker profile to properly support the added weight.


Thicker slabs cost more due to increased materials. Decide if the added cost warrants the benefits of greater thickness for your specific project.

Standard Thickness for Specific Quartz Products

Popular quartz brands like Caesarstone, Cambria, and Silestone all offer the standard 3/4 inch thickness for most colors and styles. Some product lines come in alternate thicknesses. Here are a few examples:

  • Caesarstone: Available in 3/4 inch, 1 1/4 inches, and 2 inches
  • Cambria: Available in 3/4 inch and 1 1/4 inches
  • Silestone: Available in 2 cm (3/4 inch), 3 cm (1 1/4 inches), and 5 cm (2 inches)

When selecting a specific quartz pattern and color, double check what thicknesses are available. Most varieties can be ordered in 3/4 inch standard thickness, but some more delicate styles may only come in thicker options for durability.

Can You Use Multiple Slabs for Extra Thickness?

Gluing two or more thinner quartz slabs together can theoretically achieve a thicker countertop. However, most manufacturers advise against this. The seams are prone to separation over time, compromising strength and creating an uneven surface. It also makes any future repairs extremely difficult. For special projects, one thick slab is best.

Is Thicker Quartz More Expensive?

Yes, thicker quartz slabs cost more per square foot due to requiring more raw materials. Here is a rough estimate on how thickness impacts cost:

  • 3/4 inch quartz: $55-$75 per square foot
  • 1 1/4 inch quartz: $70-$90 per square foot
  • 2 inch quartz: $100+ per square foot

Labor costs also go up for cutting and installing thicker, heavier slabs. Be sure to factor this added expense into your budget if choosing above standard thickness.

Pros and Cons of Thicker Quartz Countertops

Before deciding on thickness, weigh the advantages and disadvantages:


  • Added durability and strength
  • Minimal sagging over longer spans
  • Accommodates heavier use and weight
  • Maintains stability with extended overhangs
  • Allows for more intricate edge profiles


  • Increased expense due to more materials
  • Heavier and more difficult to maneuver and install
  • Limited color/style options above 3/4 inches
  • Not required for low-use projects

Quartz Thickness Recommendations by Application

Here are general thickness guidelines for popular quartz uses:

Kitchen Countertops

  • Island or peninsula with overhang: 1 inch
  • Heavy duty prep area: 1 inch
  • Typical surface with undermount sink: 3/4 inch

Bathroom Vanities

  • Vessel or undermount sink: 3/4 inch
  • Integral sink basin: 1 inch


  • Standard height backsplash: 3/4 inch
  • Full height backsplash: 1 inch

Outdoor Kitchen

  • Countertops: 1 inch
  • Grill surround: 2 inches

Bar Tops

  • Overhang less than 6 inches: 3/4 inch
  • Overhang greater than 6 inches: 1 inch

Achieving the Ideal Thickness for Your Project

When planning a quartz installation, carefully evaluate the intended usage along with countertop dimensions and edge details. This ensures you achieve the perfect slab thickness to stand up to years of use without unnecessary added expense. Be sure to consult with an experienced quartz fabricator for their professional recommendations on ideal thickness. With smart thickness selection, you can enjoy the unparalleled performance and worry-free maintenance that makes quartz one of the most coveted countertop materials on the market today.

FAQs About Quartz Countertop Thickness

What thickness is best for a kitchen island?

For a kitchen island with seating, a 1 inch thick quartz top is ideal to accommodate overhangs up to 16 inches. This prevents sagging or instability over time.

What thickness should I get for a quartz backsplash?

The standard 3/4 inch thickness is suitable for a 4-6 inch standard height backsplash. For a full height backsplash, 1 inch thickness provides more durability.

Can quartz countertops be too thick?

Quartz can technically be made in any custom thickness, but going over 2 inches is overkill for residential settings. The excess thickness adds cost without significant benefit unless supporting extremely heavy loads.

Is 2 cm quartz strong enough?

2 cm equates to 3/4 inch, which is the standard quartz thickness suitable for most applications. It provides an ideal balance of sleek aesthetic and rock-solid strength.

Should I get 1 inch or 1 1/4 inch thick quartz?

For heavy duty use or long spans, 1 1/4 inch may be the best choice. However, 1 inch thickness is often adequate for added durability without going overboard on cost. Consult your installer to decide if 1 1/4 inches is warranted.


Quartz offers homeowners incredible durability, low maintenance, and designer looks. Choosing the right thickness ensures it withstands heavy daily use while retaining its elegant beauty. For most kitchens and bathrooms, the 3/4 inch standard thickness provides the ideal balance. But evaluating usage, spans, overhangs, edges, and budget allows you to select the perfect quartz thickness for flawless performance and enjoyment for decades to come.