Belgian Block Calculator — Granite Cobbles Per Linear Foot
Estimate Belgian block (granite cobbles) for driveway edges, garden borders, and traditional cobblestone walkways. Returns linear footage and unit count.
Enter Dimensions
Polymeric sand joints: 1/4 in typical
Use 10% for simple shapes, 15% for cuts
Results
Pavers Needed
264pavers
Total Area
120sq ft
Sand Base (50 lb bags)
12bags
1-inch bedding layer
Gravel Base
1.5tons
4-inch compacted gravel base
Editorial Standards
Each calculator is reviewed for formula accuracy, unit consistency, and alignment with current U.S. building practices before publication. We verify outputs against published engineering references and real-world project data. Learn more about our methodology.
Belgian block (granite cobble) is a premium traditional landscape material — kiln-fired or quarry-cut granite blocks with a rough top surface and clean sides. Common uses: driveway edges, formal courtyard borders, garden walls (set on edge), and as the apron transition between driveway and street.
This calculator estimates block count for linear edging or border use. For full paving applications, calculate by area using the standard pavers-per-sq-ft formula.
How to Estimate Belgian Block
Blocks per LF = 12 ÷ block face width (inches). Total = LF × Blocks/LF × (1 + waste %).
Belgian Block Reference
- 4 inch face (standard): 3 blocks per LF
- 5 inch face (formal): 2.4 blocks per LF
- 6 inch face (driveway apron): 2.0 blocks per LF
- Set vertically (taller side up): doubles the cost per LF; rare
- Weight: ~12-18 lb per block; pallet of 100-200 blocks weighs 1500-3000 lb
- Price: $5-15 per block depending on source
Frequently Asked Questions
What is a Belgian block?
Belgian block (also called Belgian cobble or jumbo cobble) is a rectangular cut granite stone, typically 4-5 inch wide × 8-12 inch long × 4-5 inch deep. Used for driveway edges, garden borders, formal walkways, and traditional cobblestone driveways.
How many Belgian blocks per linear foot?
Depends on block size. For standard 4×9 inch face Belgian blocks (4 inch on the visible edge): 12 inch ÷ 4 inch = 3 blocks per linear foot of edging. For 5-inch face: 2.4 blocks per LF.
How are Belgian blocks installed?
Same base prep as pavers — 4 inch compacted aggregate base + 1 inch bedding sand. Set blocks tight against each other, joints filled with stone dust or polymeric sand. For driveway edges, mortar bedding is sometimes used for permanence.
Are Belgian blocks expensive?
Yes — Belgian block is real granite, typically $5-15 per piece (vs $1-3 for concrete pavers). For a 50 ft driveway edge (3 per LF): 150 blocks × $8 = $1,200 in stone alone, plus base materials.
Can Belgian blocks be used for driveways?
Yes — full Belgian block driveways are an iconic traditional surface. But they're significantly more expensive and slower to install than concrete pavers. Most modern use is as decorative edge or apron rather than full driveway surface.
Looking for the general calculator?
Calculate how many pavers you need for patios, walkways, and driveways. Includes bedding sand and gravel base estimates for any paver size and project area.
Open the Paver Calculator: Pavers, Sand & Base →