How Much Does a Granite Slab Weigh? Sizes, Weights and Safe Handling
Granite weighs about 13 lb per square foot at 2 cm thickness (54 kg/m2) and about 16.6 lb per square foot at 3 cm (81 kg/m2). A standard 3 cm full slab (3000 x 1900 mm) weighs roughly 1,000 lb (462 kg), heavy enough that mechanical lifting is the safe option.
| Granite density | approx. 168 lb/ft3 (2,700 kg/m3) |
|---|---|
| Weight at 2 cm thickness | 11.1 lb/ft2 (54 kg/m2) |
| Weight at 3 cm thickness | 16.6 lb/ft2 (81 kg/m2) |
| Standard slab size | 118 x 75 in (3000 x 1900 mm), approx. 61 ft2 (5.7 m2) |
| Standard slab @ 2 cm total | approx. 679 lb (308 kg) |
| Standard slab @ 3 cm total | approx. 1,018 lb (462 kg) |
| Jumbo slab @ 3 cm (126 x 79 in) | approx. 1,143 lb (518 kg) |
| Typical fabricated countertop section | 200 to 500 lb (90 to 227 kg) |
If you are sizing a crew, a vehicle, or a lifting solution around natural stone, the first number you need is weight. Granite is dense rock, and a single full slab routinely tips past 1,000 lb (454 kg). Getting the figure right keeps people safe, keeps slabs intact, and stops you from under-specifying the gear that moves them.
This guide gives you granite weight by thickness and by slab size, in both imperial and metric, plus the practical handling thresholds that matter on a fabrication floor or a job site.
How much does granite weigh per square foot and per square metre?
Granite has a density of roughly 168 lb/ft3 (2,700 kg/m3). That figure varies a little by quarry and mineral content, but it is the standard working value for fabricators. From density and thickness you can derive the two numbers buyers ask for most:
- 2 cm granite: about 11.1 lb per square foot (54 kg per square metre).
- 3 cm granite: about 16.6 lb per square foot (81 kg per square metre).
The 3 cm slab is roughly 50 percent heavier per unit area than the 2 cm slab, because weight scales directly with thickness. That difference is exactly why 3 cm material, now the dominant choice for kitchen countertops in both the US and Australia, pushes so many shops toward mechanical handling.
How much does a full granite slab weigh?
Quarries and distributors sell granite in large format slabs. A common standard slab measures around 118 x 75 in (3000 x 1900 mm), giving roughly 61 ft2 (5.7 m2) of surface. Jumbo and supersize blocks run larger, around 126 x 79 in (3200 x 2000 mm) or more.
Multiply area by the per-area weight and the totals climb fast:
- Standard slab, 2 cm: approximately 679 lb (308 kg).
- Standard slab, 3 cm: approximately 1,018 lb (462 kg).
- Jumbo slab, 3 cm: approximately 1,143 lb (518 kg).
These are bare-stone figures. A crated or A-frame-mounted slab carries additional weight from the packaging and frame, which you must account for when loading trucks or rating a lifting device.
What does a fabricated countertop section weigh?
Once a slab is cut into countertop pieces, individual sections usually land between 200 and 500 lb (90 to 227 kg), depending on length, depth, and thickness. A long island top in 3 cm granite can still exceed 400 lb (180 kg) as a single piece. Sinks cut out, the remaining stone is awkwardly balanced, which raises the handling risk even when the raw weight drops.
Why granite weight matters for safe handling
Weight is only half the hazard. Granite slabs are large, rigid, and brittle in bending. A 3 cm full slab carried flat or mishandled can crack under its own weight, and a slab that shifts during a manual lift can pin or crush a worker. Both the US (OSHA general duty and manual handling guidance) and Australia (the model WHS hazardous manual tasks code) treat repetitive lifting of heavy, bulky loads as a recognised injury risk that employers must control.
Practical thresholds worth keeping in mind:
- A single full slab is well beyond safe two-person manual lifting limits. Most guidance caps a sustained team lift far below the 679 to 1,143 lb (308 to 518 kg) range a full slab occupies.
- Manual slab moves drive back, shoulder, and crush injuries, plus stone breakage that writes off expensive material.
- Vacuum lifting spreads the load across the slab face, supports the stone in its strong plane, and lets one operator place a slab with control instead of muscle.
How Quattrolifts handles granite slabs
Quattrolifts builds vacuum lifting equipment specifically for heavy, rigid materials like stone. For granite work, the right tool depends on whether you are unloading slabs, feeding a saw or CNC, or installing finished tops. Our granite vacuum lifter range is rated to handle full slabs safely, gripping the polished or honed face with sealed vacuum pads so the stone is supported across its surface rather than pinched at the edges.
Across the lineup, the Omni, Vector, Glassboy, Express, Nomad, Mule, and Horizon ranges cover different capacities, reach, and power options, from workshop slab handling to on-site installation. Because vacuum lifters carry the load through the pad seal, capacity is matched to slab weight and pad area, so specifying the correct model starts with the weight figures above. If you tell us your typical slab size and thickness, we will point you to the range that fits.
For a broader view of how vacuum handling reduces breakage and injury across stone, glass, and metal, see our full machine range. Sizing a lifter correctly the first time is far cheaper than a cracked jumbo slab or a back injury claim.
Quick reference: granite weight at a glance
To recap the load you are planning around: granite runs about 11.1 lb/ft2 (54 kg/m2) at 2 cm and 16.6 lb/ft2 (81 kg/m2) at 3 cm. A standard full slab weighs roughly 679 lb (308 kg) in 2 cm and about 1,018 lb (462 kg) in 3 cm, with jumbo slabs reaching 1,143 lb (518 kg) or more. Any of those figures is reason enough to put a rated vacuum lifter between your crew and the stone.
Frequently asked questions
How much does a 3 cm granite slab weigh?
A 3 cm granite slab weighs about 16.6 lb per square foot (81 kg per square metre). A standard full slab at 3 cm (118 x 75 in / 3000 x 1900 mm) weighs roughly 1,018 lb (462 kg).
How much does a granite countertop weigh per square foot?
At 2 cm thickness, granite weighs about 11.1 lb per square foot (54 kg/m2). At 3 cm, the more common countertop thickness, it weighs about 16.6 lb per square foot (81 kg/m2).
Can two people lift a full granite slab?
No. A full granite slab runs from roughly 679 lb (308 kg) up to 1,143 lb (518 kg), far beyond safe two-person manual limits. Use a rated vacuum lifter or mechanical handling equipment.
How much does a standard granite slab weigh in total?
A standard slab (about 118 x 75 in / 3000 x 1900 mm) weighs roughly 679 lb (308 kg) at 2 cm thickness and about 1,018 lb (462 kg) at 3 cm thickness.
Is granite heavier than marble or quartz?
Granite (about 168 lb/ft3 / 2,700 kg/m3) is similar to marble and slightly heavier than most engineered quartz. All three are dense enough that full slabs require mechanical or vacuum lifting.
