Free Tool for Stone Fabricators

Countertop Slab Calculator

Calculate exact slab requirements with optimal piece placement and seam control.

📐L, U & Island shapes
✂️Seam placement control
🎯Visual slab layouts

Countertop Shape

Dimensions (inches)

Main Section
Left Extension

Slab Settings

Seam Placement

Main ↔ Length SeamValid: 21% - 79%
Left: 75.0"Right: 75.0"

Countertop Preview

150"25"
Main
Left Ext
Seam

Slab Layouts

Slab 169% used
Main 1Main 2Left Ext

Material Summary

1
Slabs Needed
69%
Utilization
Countertop Area34.38 sq ft
Total Slab Area50.00 sq ft
Waste15.63 sq ft

All Pieces (3)

Main 1
75.1" × 25.0"(13.02 sq ft)
Main 2
75.0" × 25.0"(13.02 sq ft)
Left Ext
48.0" × 25.0"(8.33 sq ft)

Slab count and piece layouts

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3

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