How Thick is Quartz Countertops? The Definitive Guide to Quartz Countertop Thickness

Quartz countertops have become an increasingly popular choice for kitchen and bathroom remodels in recent years. With their durability, low maintenance, and customizability, it’s easy to see why. But when it comes to selecting your quartz countertops, one of the most important considerations is the thickness. How thick is quartz countertops? This comprehensive guide will examine the standard thicknesses available, factors that impact thickness choice, and recommendations to ensure you get the perfect quartz countertop thickness for your space and needs.

Standard Quartz Countertop Thicknesses

Quartz manufacturers typically offer three standard thicknesses for countertops:

3/4″ Thick Quartz Countertops

This is the slimmest quartz countertop thickness commonly available. At just 3/4″ thick, these quartz slabs are lightweight and budget-friendly. They can work well for simple counter spaces that don’t require heavy use. Just keep in mind that thinner quartz is somewhat more fragile and prone to cracks than thicker options.

1 1/4″ Thick Quartz Countertops

The 1 1/4″ thickness is considered the standard for most quartz countertop installations. At this thickness, the quartz material provides a durable and resilient surface that can stand up to daily wear and tear. The added thickness provides more stability and makes the countertops less likely to crack or chip if heavy objects are dropped on them. This versatile middle-ground thickness works for most kitchens and bathrooms.

1 1/2″ Thick Quartz Countertops

For areas that will see heavy usage, busy kitchens, commercial applications, or homes with children, the 1 1/2″ thickness provides maximum durability. These slabs are more resistant to damage, scratches, impacts, cracks, and heat. The only downside is the extra cost and weight associated with thicker quartz.

Factors Impacting Quartz Countertop Thickness Choice

Choosing the right thickness comes down to assessing the needs of your space and weighing several factors:

Usage Level

How much daily use and wear will the counters see? High-traffic kitchens benefit from the enhanced durability of thicker quartz around 1 1/4” or 1 1/2”. For minimal use areas, 3/4” can potentially suffice.

Overhang Length

The longer the overhang from the cabinet to the counter edge, the more thickness is needed for support. Overhangs wider than 9 or 10 inches require a 1 1/4” slab or thicker to prevent sagging. More substantial 2”+ overhangs call for the thickest 1 1/2″ option.

Cabinet Base Material

What material are the underlying cabinets made from? For the stability of natural wood or laminate cabinets prone to swells and shifts, a thicker countertop provides reinforcement. With sturdy cabinets, thinner options may work.

Type of Installation

Is this new construction or a remodel? In remodels, you’re limited to thicknesses that align with the existing cabinet height. New builds allow you to select freely.


There is a direct correlation between quartz thickness and cost. Thinner 3/4″ options provide savings, while 1 1/4″ is reasonably priced for most projects. The 1 1/2″ thickness commands the highest price tag.


Personal style comes into play too. Some homeowners prefer the clean, minimalist look of thinner countertops. Others favor the heft and seamlessness of thicker quartz.

Intended Use

How will the space be used? Thicker quartz stands up better to rolling/kneading dough, juicing, food prep, parties, kids, and other heavy kitchen use. Low-impact areas like bathrooms can get by with less.

By evaluating these factors against your unique needs, you can zero in on the ideal thickness for your setting.

Recommended Thicknesses by Location

Here are some quartz countertop thickness guidelines for popular areas:

Kitchen Countertops

For most kitchens, a 1 1/4″ slab provides the best blend of affordability, functionality, and resilience. Baking/cooking enthusiasts may want the bulletproofing of 1 1/2″. Island counters and overhangs exceeding 6” also benefit from the rigidity of thicker quartz.

Bathroom Vanities

In bathrooms, moisture resistance takes precedence over impact resistance. Since bath counters see lighter use, 3/4″ or 1 1/4″ thicknesses are adequate. Vessel sinks with 3cm+ quartz rims should go with 1 1/4″ minimum.

Bars and Wet Bars

Quartz offers spill, moisture, and stain resistance for home bar areas. Moderate 1 1/4″ thicknesses work for most residential bars. Commercial-grade bars/nightclubs may need 1 1/2″ for durability.

Laundry Rooms

For laundry and utility rooms, quartz delivers waterproofing and mold/mildew resistance. The lighter use of folding and sorting clothes means 3/4″ or 1 1/4″ thicknesses suffice here.

Outdoor Kitchen Countertops

Outdoors, quartz holds up to sun, rain, snow, and temperature swings. Go with 1 1/4″ or 1 1/2″ to prevent cracks and sagging. Thick quartz also better resists impacts and surface damage from outdoor use.

Does Thicker Quartz Equal Better?

Is thicker quartz countertop material inherently better? Not necessarily. The optimal thickness depends on assessing the factors unique to your space. Here are a few key considerations:

Durability – Yes, thicker quartz is more resistant to cracks, impacts, scratches, and damage. But thinner materials may still hold up fine with proper care in lower use areas.

Stability – Increased thickness provides enhanced structure and support. But cabinets and undermounting also contribute to stability. With proper installation and support, thinner quartz can still feel solid.

Cost – There is a linear relationship between thickness and cost. But thinner quartz isn’t necessarily cheap or low-quality. It offers an affordable option.

Aesthetics – Some prefer the refined look of slimmer countertops. Others like the rugged feel of thicker surfaces. It comes down to individual style.

The right thickness comes down to aligning performance, budget, and visual appeal with how the space will be used. While thinner options save money, the classic 1 1/4″ mid-range thickness fits most applications.

Standard Thickness for Popular Quartz Brands

Many leading quartz manufacturers offer three standard thicknesses in line with the 3/4”, 1 1/4”, 1 1/2” options outlined above. Here are some examples:

While thickness offerings vary slightly between brands, the standard thicknesses of 3/4″, 1 1/4″, and 1 1/2″ encompass most options. Be sure to consult with your specific manufacturer of choice when selecting quartz slab thickness. Many also offer custom sizing.

How Much Does Quartz Thickness Impact Cost?

Because more material is required, thicker quartz countertops cost more per square foot. Here are some rough estimates of how thickness impacts installed cost:

  • 3/4” quartz – Ranges from $40-$70 per square foot installed. Provides budget-friendly option.
  • 1 1/4” quartz – Runs $55-$80 per square foot installed. Most popular blend of value and performance.
  • 1 1/2” quartz – Spans $70-$100 per installed square foot. Highest cost but also most durable and resilient.

Of course, the exact price varies based on your manufacturer, pattern, edge profiles, and local labor costs. But in general, thinner 3/4” quartz will provide 20-30% cost savings over 1 1/2” slabs. An investment in thicker materials can pay off long-term in added durability and longevity.

Achieving the Perfect Overhang with Quartz Countertops

One area where quartz thickness comes into play is in enabling the desired overhang from the counter edge to the cabinet face. Here are some quartz countertop overhang guidelines:

  • 3/4” Quartz: Limit to 3/4” – 1 1/2” overhangs only
  • 1 1/4” Quartz: Can accommodate 1 1/2” – 5 1/2” overhangs
  • 1 1/2” Quartz: Ideal for overhangs exceeding 5” up to 10-12”

Of course proper installation with corbels, brackets, or other support is still needed on wider overhangs. But the thickness provides the foundation. Thinner 3/4″ quartz limits overhang possibilities, while thicker 1 1/2” materials allow for dramatic, spacious overhangs.

Thickness Recommendations for Quartz Backsplashes

Quartz makes for an attractive, seamless backsplash when matching the countertop slab. For quartz backsplashes, these thickness guidelines apply:

  • 4” or shorter backsplash: 3/4” thickness is fine
  • 6-8” backsplash – Go with 1 1/4” thickness
  • Full height backsplash – Use substantial 1 1/2” thickness

Thinner 3/4″ quartz works for simple short backsplashes. But for taller installations, a thicker slab prevents sagging or detachment from the wall over time.

Achieving Structural Support for Thinner 3/4″ Quartz

For homeowners who favor the slimmer aesthetic of 3/4” quartz but need added durability, there are ways to provide supplemental structural support:

  • Additional plywood underlayment attached to cabinet boxes
  • Wood or steel corbels added under overhangs
  • Metal angles and brackets attached discreetly underneath for span support
  • Urethane adhesive to adhere slabs directly to cabinet face

With proper reinforcement, 3/4″ slabs can gain some of the enhanced sturdiness of thicker quartz. But for best results, always consult countertop installers on the most suitable support solutions.

When to Use 3/4″ Thick Quartz Countertops

While thinner 3/4″ quartz slabs have limitations, they can be a smart choice in certain settings:

Low-Use Areas

For guest baths, laundry rooms, and other spaces with minimal use, a 3/4″ thickness offers affordability without sacrificing quartz durability.

Simple Designs

In straightforward applications without overhangs, unique shapes, or heavy impacts, 3/4″ provides sufficient structure and support.

Controlled Budgets

If cost is the overriding factor, 3/4″ quartz allows you to reap some benefits of quartz versus natural stone or other materials.

Mosaic Backsplashes

Since less material is needed, thinner 3/4” quartz can minimize waste when used for mosaic backsplash designs.

While best suited to simple applications, 3/4″ quartz delivers an affordable way to get the advantages of quartz. Just be sure to consult on added support when needed.

The Takeaway on Quartz Countertop Thicknesses

When selecting quartz countertops, the thickness of the slab is an important factor that impacts durability, cost, and structural support. Here are some key conclusions:

  • For most kitchens, the 1 1/4” thickness offers the best balance of performance, value, and function.
  • High use kitchens benefit from the added resilience of 1 1/2″ thick quartz.
  • Budget-friendly 3/4″ works for simple applications but requires care and added support.
  • Overhang limits, backsplashes, cabinets, and usage should all inform ideal thickness.
  • Increased thickness means added cost but also boosts lifespan and structure.

Don’t decide on quartz thickness in isolation. Carefully weigh the cabinet layout, installation factors, usage patterns, and budget to make the smartest choice for your unique space and needs. With quartz thickness starting at 3/4” and ranging up to 1 1/2”, you’re sure to find the perfect fit.

FAQ About Quartz Countertop Thickness

Many homeowners have lingering questions when evaluating quartz countertop thickness options. Here are answers to some of the most frequently asked questions:

Is thicker quartz more expensive?

Yes, thicker quartz countertops carry a higher price tag. Because more material is required, costs per square foot are 20-30% higher for 1 1/2” slabs compared to 3/4″ options. But the added thickness also boosts longevity and resilience.

How thick are quartz countertops normally?

The most common thickness for quartz countertops is 1 1/4”. This versatile middle-ground thickness provides an optimal blend of durability, functionality, and affordability for most kitchens and bathrooms.

What is the thinnest quartz countertop available?

Most manufacturers offer 3/4” as the thinnest quartz countertop choice. Some may go as slim as 5/8”, but 3/4″ is the most widely available minimum thickness before durability and performance suffer.

What thickness quartz is best?

For most residential settings, 1 1/4” quartz countertops provide the ideal thickness when considering cost, durability, and support. High traffic areas may benefit from 1 1/2”, while simple applications can utilize slimmer 3/4” options.

Can you put thick quartz on thin cabinets?

Installing thick 1 1/2″ quartz on old 24” deep cabinets is possible but will likely require additional cabinet modification, reinforcement, and overhang support. Thinner 1 1/4″ or 3/4″ slabs would be better suited.

Is 2 cm quartz too thin?

2cm corresponds to 3/4” thickness, which is on the thinner side but can work well for simple applications. Areas with overhangs, heavy use, or movement may require thicker 1 1/4” or 1 1/2″ options instead for best support.

Do you need thicker quartz for bigger counters?

For larger, expansive quartz countertops like islands exceeding 6 feet long, thicker 1 1/4″ or 1 1/2″ slabs help maintain stability along the entire span. The minimal rigidity of 3/4” quartz can lead to sagging on oversized installs.

Is thicker quartz less prone to cracks?

Yes, thicker quartz countertops are inherently less prone to cracks, chips, and damage under pressure. The added density and rigidity of 1 1/4” or 1 1/2” quartz make it more crack-resistant than thinner 3/4″ options when faced with impacts.

How much overhang support is needed for 3/4″ quartz?

For 3/4″ quartz overhangs beyond 3”, structural support is recommended. Some options include corbels placed 12-18” apart, oak brackets, metal angles, or added plywood underlayment for increased strength. Consult your installer on the optimal reinforcement.

Every installation and homeowner has unique needs when it comes to quartz countertop thickness. If you have additional questions about the right thickness for your space, be sure to ask your quartz fabricator or installer. Their expertise can help guide you to the perfect quartz thickness choice.

Factors to Consider When Choosing Quartz Countertop Thickness

Selecting the right quartz countertop thickness goes beyond just personal preference. There are several important factors to consider:

Usage Level

  • High traffic areas like main kitchen counters benefit from thicker 1 1⁄4” or 1 1⁄2” quartz that can stand up to daily wear and tear.
  • For bathrooms and lesser used spaces where resilience isn’t as critical, slimmer 3⁄4″ quartz may suffice.

Overhang Length

  • Quartz overhangs wider than 10” need thicker support, generally 1 1⁄4” or 1 1⁄2”.
  • On overhangs exceeding 2”, thicker quartz prevents sagging and cracking over time.

Base Cabinet Material

  • Highly rigid cabinet materials like metal can support thinner countertops.
  • Weaker laminate or natural wood cabinets benefit from the added reinforcement of thicker quartz.

Installation Type

  • In a remodel, your thickness choices