20mm Worktop And 30mm Worktop: Difference Between Quartz Worktops Thickness

 In Kitchen Worktops, Quartz Worktops

Worktop thickness can influence the functionality, safety, and design of your worktops. There is a variety of worktops available in various thicknesses, such as:

  1. Wood worktops are typically available in 28mm or 38mm thickness. However, they can even be thicker up to 60mm to 80mm.
  2. Laminate worktops are usually around 38mm to 40mm thick.
  3. Natural stone worktops like marble and granite are generally 30mm in thickness.
  4. Engineered quartz worktops have standard 20mm or 30mm thickness. But some manufacturers even create them in 13mm thickness.
  5. Dekton worktops have around 20mm thickness.

Over recent years, both 20mm and 30mm thicknesses have become popular in worktops. But the thickness of a worktop also depends on the material you choose. If you pick the durable and functional quartz worktops, you can either select it in 20mm thickness or 30mm thickness.

The thickness of quartz also depends on the kitchen style, worktop area,kitche and the desired strength required for handling daily wear and tear.

Difference between 20mm worktop thickness and 30mm worktop thickness 

Here’s the difference between 20mm and 30mm worktop thickness:

  1. Strong: 30mm quartz worktop thickness can easily bear more pressure on a single point compared to the 20mm worktop. While there is nothing wrong with 20mm worktop thickness, you need a more durable worktop thickness in a kitchen where you do a lot of food preparation.
  2. Durable: Quartz countertop thickness in both 20mm and 30mm are considered durable. However, the 30mm worktop has chunkier look that adds grandeur and magnificence to an interior. However, for slim, sleek, and contemporary design, a 20mm worktop is a suitable option and can add a modern touch to any room.
  3. Structural security: 30mm kitchen worktop thickness has higher structural security compared to 20mm worktops. Due to better structural security, a 30mm countertop enables support to 300mm of unsupported overhang that’s ideal for diners to have a seat on most tables or a breakfast bar. On the other hand, 20mm worktops are allowed a maximum 250mm unsupported overhang that’s comfortable enough to enjoy a meal. Besides being able to install larger unsupported overhands, 30mm thick quartz countertops also help in maintaining the overall load and balance of any kitchen furniture.
  4. Applications: While 30mm quartz worktops are perfect for kitchen and bathroom worktops, as well as flooring in both residential and commercial spaces, 20mm thick quartz can be installed to create slightly thin and sleek kitchen islands, splashbacks, upstands, and windowsills. Since 20mm quartz worktops are lighter than 30mm quartz slabs, you can easily customize them for different applications. So, if you want to install quartz on kitchen worktops, consider the 30mm thickness for luxurious and extravagant aesthetics. But for any other areas like splashbacks, wall cladding, etc., choose 20mm worktops for a sleek yet elegant appearance.
  5. Support to sinks and hobs: The 30mm quartz worktops provide better support to sinks and hobs compared to 20mm worktops. Since 30mm quartz worktops are more durable, tougher, and stronger than 20mm worktops, they can withstand any sized kitchen hob or sink without an issue.

So, you may consider the installation of quartz at different areas of your home depending on its thickness.

Choose Best Suitable Kitchen Worktop Thickness for you 

Whether 30mm worktop is better for your kitchen? Yes, it’s a better option most of the time. Many modern kitchen interiors have hobs of certain depth these days. So, in most cases, a 20mm worktop won’t be a great option because it’s not appropriate for the same design. For, opening a drawer below becomes difficult with a 20mm worktop. Therefore, sticking to 30mm quartz thickness is the best option.

Today, induction hobs are becoming popular because of its slimline characteristics. Since these hobs have inductions coils at its bottom, you can create a minimalist appearance in your kitchen. When selecting an induction hob, it’s important to know its thickness. For installing an oven under the hob, a 30mm quartz worktop is a more suitable option.

However, it is recommended to check with hob manufacturers and retailers to ensure whether they would go well with the worktop thickness you intend to select. You may not be aware that many induction hob brands manufacture their products to suit either 30mm or 20mm thickness worktops. Therefore, it’s better to consult professionals before making the buying decision. The professionals will guide you properly about which product will better suit your worktop thickness.

Where We Can Use 20mm and 30mm Thickness Worktop 

In recent years, many homeowners have chosen a 20mm worktop over a 30mm worktop. This is because the thickness of 20mm worktops can easily be customized for both worktops and other areas like upstands, splashbacks and windowsills.

With 20mm worktop thickness, you don’t have to buy another slab for creating vertical panels or installation onto other areas in your home. You don’t even have to mill down your 30mm quartz worktop to 20mm, which is a time-consuming and labor-intensive process, as well as carries an extra price.

But if you want the extravagant and chunkier worktop aesthetic, 30mm kitchen worktop thickness is suitable for your project. But for splashbacks and vertical panel installations, you again need to consider 20mm quartz countertop thickness. This is because the 20mm thickness looks more attractive in splashbacks and other appliances around a house than in 30mm thickness.

For instance, if you install upstands, splashbacks, and worktops in the same 30mm thickness, the overall visual appeal of your interior will impact adversely. Hence, you need to understand which particular quartz material thickness looks great on which specific areas of your house. This way you can make a wise buying decision.

What is the Price Difference in Both Worktop Thicknesses?

A 30mm quartz worktop has more material compared to a 20mm worktop. The more the material, the higher will be its price. There is generally 30% of the price difference between 20mm and 30mm worktop thickness.

When fabrication and labor costs are added, 30mm quartz countertop thickness becomes 15% more pricey than the 20mm worktop. This proves that a 30mm quartz worktop is more expensive compared to a 20mm quartz worktop.
If you are on a budget, your designers and architects would recommend you to go for 20mm worktops. There is no difference in the looks and patterns of 20mm and 30mm quartz kitchen worktops. After all, everyone will notice the beauty of your worktops, rather than how thick your worktop is.

Besides, your preference and other factors like placement, budget, etc. persuade your buying decision. Remember the points mentioned above when choosing between 30mm and 20mm quartz worktops. Considering the given points will help you make a better decision for your home.


Homeowners can often get confused between the 30mm thickness and 20mm thickness of quartz worktops. While there are some other thicknesses available too, 30mm and 20mm are the standard thicknesses.
For many people, it’s a matter of preference and what looks good according to them. But it’s also crucial to consider the aforementioned points when selecting between these two standard worktop thicknesses. After all, installing a worktop in a kitchen is a big investment.

We hope that after reading the given factors, you have more clarity and surety of which particular quartz worktop thickness would suit your kitchen.

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