Quartz countertops are an increasingly popular choice for kitchens and bathrooms because they’re durable, low-maintenance, and come in a wide variety of beautiful colors and patterns. But if you’re planning a renovation or new build, you’re probably wondering:
How many square feet is a slab of quartz?
In this guide, we’ll break down typical quartz slab sizes, how much coverage you can expect, how to calculate your project’s needs, and tips to get the most value from your quartz investment.
What Is a Quartz Slab?
Unlike natural stone like granite or marble, quartz countertops are engineered stone products made by combining natural quartz crystals with resins and pigments. The result is a non-porous, highly durable slab that mimics the beauty of natural stone but with more consistency and less maintenance.
Quartz slabs are manufactured in standard sizes at factories and then cut to fit your space. Understanding the size of a typical slab helps you plan how many slabs you’ll need — and how much waste to expect.
Average Size of a Quartz Slab
A standard quartz slab is usually about:
- 120 inches (10 feet) long
- 55 inches (4.5 feet) wide
- 1.25 inches thick (though some slabs are 0.75 inches)
So, a typical full slab of quartz is around 50 to 55 square feet.
Calculation:
- 120 inches × 55 inches = 6,600 square inches
- 6,600 ÷ 144 = 45.8 square feet
Depending on the brand and manufacturer, some slabs can be slightly larger or smaller. Many popular quartz manufacturers, like Caesarstone, Silestone, and Cambria, also offer jumbo slabs, which can be up to 65 square feet or more. For calculating we used countertop calculator by Edstone Inc.
Example Jumbo Slab Size:
- 130 inches × 65 inches = 8,450 square inches
- 8,450 ÷ 144 = 58.7 square feet
How Many Square Feet Do You Need?
When planning your quartz countertops, knowing how many square feet you need helps you estimate the number of slabs required. Here’s a quick way to figure that out:
- Measure Each Countertop Section
Measure the length and depth of each section in inches. - Calculate Each Section’s Square Footage
Multiply length × depth (in inches), then divide by 144 to get square feet. - Add It All Up
Add the square footage of each section to find your total. - Add Overage for Waste
Always plan for 10% to 20% extra for cuts, seams, and mistakes.
Example:
If your kitchen countertops add up to 40 square feet, you should plan for about 45 to 50 square feet of material to be safe.
Will You Need More Than One Slab?
One slab might be enough for a small kitchen or bathroom vanity, but for larger kitchens with an island, multiple counters, or a waterfall edge, you’ll likely need two or more slabs.
Remember, fabricators have to cut the slab to fit sinks, stoves, and corners. This creates waste material that can’t always be reused. That’s why your total slab usage may be slightly higher than your actual square footage.
Can Quartz Slabs Be Seamed Together?
Yes! For bigger projects, multiple slabs are joined with seams. Good installers place seams in less noticeable areas, like corners or near sinks. Skilled fabricators can match the pattern so the seam blends in.
Common Slab Sizes by Popular Brands
Here’s a quick look at average slab sizes from major quartz brands:
| Brand | Standard Slab | Jumbo Slab |
| Caesarstone | ~120″ × 56″ (47 sq. ft) | ~130″ × 64″ (58 sq. ft) |
| Silestone | ~120″ × 55″ (46 sq. ft) | ~128″ × 63″ (56 sq. ft) |
| Cambria | ~122″ × 55″ (47 sq. ft) | ~132″ × 65″ (60 sq. ft) |
Keep in mind that sizes vary slightly by style and color.
Tips to Get the Best Value
✅ Work with an Experienced Fabricator
A skilled fabricator can optimize how slabs are cut to reduce waste and save you money.
✅ Ask About Remnants
For small vanities, laundry rooms, or backsplashes, leftover pieces (remnants) can be a cost-effective option.
✅ Plan Seam Placement
Talk to your installer about where seams will go for the best appearance.
✅ Confirm Slab Size Before Buying
Always check the exact slab dimensions for the specific brand and style you want — some patterns only come in jumbo slabs, which may affect price and installation.
Final Thoughts
So, how many square feet is a slab of quartz? For most brands, you can expect a standard slab to cover about 45 to 55 square feet, while a jumbo slab can cover 55 to 65 square feet.
Knowing these numbers makes it easier to budget for your project, choose the right slab, and plan an efficient installation with minimal waste. If you’re ready to get started, talk to a trusted local quartz supplier or fabricator. They’ll help you choose the perfect slab, measure your space, and ensure your new quartz countertops fit beautifully and last for years to come.