How Thick Should My Quartz Countertop Be?

Choosing the right thickness for your quartz countertop is an important decision that impacts both functionality and cost. Here is a detailed guide on recommended quartz countertop thicknesses for different applications.


Quartz countertops, made of ground natural stone and resins, are one of the most popular options for kitchens and bathrooms today. With a wide range of colors, patterns, and finishes available, quartz offers an attractive and durable surface.

When selecting a quartz countertop, thickness is a key consideration. The thickness affects the cost, weight, stiffness, and durability of the countertop. In this article, we will discuss the factors to consider when choosing a quartz thickness and provide recommendations for different applications.

Standard Thicknesses for Quartz Countertops

Quartz countertops are typically available in three standard thicknesses:

  • 3/4 inch – The minimum thickness offered. Best for simple applications like backsplashes.
  • 1 1/4 inches – The most common and popular thickness. Suitable for most applications.
  • 2 cm (3/4 inch) – The thickest option. Recommended for heavy-use surfaces.

Thicker countertops are sturdier and more resistant to damage over time. However, thickness also significantly impacts cost and weight.

Factors to Consider

When determining the appropriate thickness for your quartz countertop, consider the following factors:


How will you use the countertop? High-traffic kitchen countertops used for meal prep require a thicker surface than low-use bathroom vanities.


Larger quartz slabs are prone to bending and sagging over time. Opt for a thicker surface for long spans or overhangs.


Proper support from below is key. Thicker surfaces can withstand overhangs with fewer supports.


Thickness significantly impacts cost. The upgrade from 1 1/4” to 2 cm can add $50-$100 per square foot.


Thicker countertops have a more substantial, luxurious look. Thinner options work well for modern, minimalist designs.

Recommended Thicknesses by Application

Kitchen Countertops

For kitchen countertops, a 1 1/4 inch thickness provides the best balance of functionality and affordability for most homes. This thickness can withstand normal wear and tear in kitchens.

For larger kitchens or gourmet cooks who intensively use the space, 2 cm provides extra durability and support. It’s the top choice for bakers kneading dough daily or cooks who heavily prep on the surface.

Bathroom Vanities

In bathrooms, 3/4 inch quartz works well for vanity tops which see lighter use. The slimmer profile pairs nicely with modern vanities with delicate legs. It’s usually the most economical choice for guest or secondary bathrooms.

For master bathrooms, the 1 1/4 inch thickness offers more durability for daily use. This versatile thickness pairs well with all vanity styles, traditional to contemporary.


For quartz backsplashes, 3/4 inch is the standard thickness. It provides enough rigidity for the small expanse above countertops. The thin profile maximizes splash protection too.


For large island countertops, especially with seating space, 2 cm quartz is ideal. The thick surface prevents bending or sagging over the large span. It provides extra support for heavily used islands.

Overhangs and Unsupported Edges

For countertops with overhangs beyond the cabinetry, increase thickness to 2 cm. The thicker profile prevents drooping over time, minimizing long-term cracking or damage. It also allows for greater overhangs unsupported.

Pros of Thicker Quartz Countertops

Selecting a thicker quartz surface comes with advantages:

  • More durable for heavy usage
  • Minimal bending over time
  • Allows for longer overhangs
  • Sturdier feel underhand
  • Luxurious, substantial aesthetic

Cons of Thick Quartz Surfaces

The drawbacks of thicker quartz include:

  • Increased cost per square foot
  • Heavier weight requiring professional install
  • Not ideal for delicate minimalist designs
  • Potential fit issues with sinks and appliances


When selecting a quartz countertop thickness, assess your space’s size, usage, and style. While 1 1/4 inches accommodates most applications, high-traffic kitchens benefit from 2 cm thickness. Delicate designs can opt for slim 3/4 inch profiles. Consider factors like overhangs, span, and budget to choose the ideal quartz thickness for your project. With its durability and style, quartz makes a worthwhile investment at any thickness.

FAQs About Quartz Thickness

How thick are most quartz countertops?

The most common quartz thickness is 1 1/4 inches. This versatile option suits most kitchen and bath applications.

What thickness of quartz is best for kitchen countertops?

A 1 1/4 inch quartz countertop provides the ideal balance of durability and cost for most kitchens. Heavy-use kitchens may opt for 2 cm thickness instead.

Is 3/4 inch quartz too thin?

While 3/4 inch quartz works for some applications, it’s generally considered too thin for most countertops. It’s best for backsplashes and non-essential surfaces with minimal use.

What is the thickest quartz countertop available?

Quartz countertops come in standard thicknesses up to 2 cm, or about 3/4 inches. This is the maximum thickness recommended for countertops.

Can you sit on a quartz countertop overhang?

With proper bracing and support, a 2 cm thick quartz overhang can comfortably accommodate sitting. The thick profile prevents sagging over time.