Home Calculators Slab Calculator
🧱
Countertops & Stone ★★★★★ Verified Tool

Slab Calculator

Determine the exact number of full granite, quartz, or marble slabs required for your project.

⚙️ Enter Project Parameters

sq ft
%
in
in
$/sq ft
📊 Calculation Results LIVE ESTIMATE
0
Total Full Slabs Required

📐 Mathematical Formula & Standard

Slab Area (sq ft) = (Slab Length in × Slab Width in) ÷ 144
Gross Area = Project Sq Ft × (1 + Waste % / 100)
Slabs Required = Ceiling(Gross Area ÷ Slab Area)

📖 Comprehensive Guide & Pro Estimating Tips

Natural stone slabs (Granite, Marble, Quartzite) and engineered Quartz slabs come in standard and jumbo sizes. A standard slab is roughly 120" x 60" (~50 sq ft), while jumbo slabs reach 126" x 63" (~55.1 sq ft) or 130" x 65" (~58.6 sq ft).

Accounting for Vein Matching & L-Seams

Because stone slabs have directional veining and require seam placement, stone fabricators typically account for 15% to 25% waste to ensure full-height backsplash match and seamless island transitions.

❓ Frequently Asked Questions

Can I buy half a slab?
Most stone distributors sell by the full slab. However, remnant yards often have partial slabs available for small vanities or fireplace surrounds.
What is the standard weight of a granite slab?
A full 3cm (1.25 inch) thick granite slab weighs between 600 lbs to 900 lbs (approximately 18 to 22 lbs per square foot).

🔗 Explore Related Calculators

ADVERTISEMENT