Cobblestone Calculator

Cobblestone Calculator Guide

Cobblestones arrive by the pallet, not the ton: suppliers quote them per square foot and stack roughly 100–120 sq ft of coverage on each pallet, so a 150 sq ft driveway apron is about a pallet and a half. What that pallet price never includes is the layer that makes cobbles walkable — the setting bed. Enter your paved area in this calculator and it sizes the 1-inch bed of concrete sand or stone dust the cobbles get tapped into.

Watch the coverage figure on the pallet tag rather than trusting averages. Jumbo cobbles and thick reclaimed street setts stack fewer square feet per pallet because each stone is deeper, and reclaimed material often loses another few percent to broken and irregular pieces.

What Is the Difference Between Setts and Tumbled Cobbles?

Format	Typical size	Look & laying	Pallet coverage
Granite setts	4 × 4 × 4 in	Crisp edges, tight courses, formal streetscape	≈ 100 sq ft
Regulation cobbles	5 × 9 × 4 in	Brick-like bond patterns, classic apron stone	≈ 100–110 sq ft
Tumbled cobbles	varies	Rounded, aged look, wide irregular joints	≈ 110–120 sq ft
Reclaimed street setts	varies	Genuine patina, sizes wander, extra cutting	≈ 90–100 sq ft

The choice changes the joint budget too: sawn setts lay with 1/4-inch joints, while tumbled stone opens gaps of a half inch or more — nearly double the joint sand for the same area.

Setting Cobbles That Stay Set

For patios and walks, cobbles follow the classic sequence: compacted crushed stone base, a screeded 1-inch setting bed, and each cobble tapped flush with a rubber mallet against a string line. Stone dust makes a slightly grippier bed for irregular tumbled material; concrete sand screeds cleaner under uniform setts. Because cobbles are small, the string line is not optional — a course that drifts an eighth of an inch per stone is two inches off by the end of the row.

Driveways raise the stakes. Wheel loads demand an 8-inch compacted base, and many installers switch the setting bed from sand to mortar or concrete for aprons that meet a street. With real granite setts at 4–5 inches thick, total excavation can pass 13 inches — cobblestone driveways are shallow civil engineering, which is also why they outlast every other residential surface.

Price the bed material as a bulk order at the sand calculator, and size the structural layer under everything with the paver base calculator — a cobble surface is only as permanent as the base it rides on. Order pallets, bed, and base together and the apron goes from sketch to stone in one delivery window.

Frequently Asked Questions

How much area does a pallet of cobblestones cover?

A standard pallet covers about 100–120 sq ft, though jumbo cobbles and thick reclaimed setts pack fewer square feet per pallet because each stone is deeper. Confirm the coverage printed on the pallet tag rather than counting stones.

What is the difference between setts and tumbled cobblestones?

Setts are quarried granite blocks with sawn or split faces and crisp edges, laid in tight courses. Tumbled cobbles have been machine-rounded for a softer, aged look and lay up with wider, more irregular joints — which also means more joint sand.

What do you set cobblestones in?

For pedestrian areas, a 1-inch screeded bed of concrete sand over a compacted crushed stone base, with each cobble tapped down flush. Driveways and aprons upgrade to a mortar or concrete setting bed over a thicker base to handle wheel loads.

How deep is a cobblestone driveway build-up?

Deeper than pavers: an 8-inch compacted base, a 1-inch setting bed, plus the cobble itself — often 4–5 inches for real granite setts. That can put excavation at 13 inches or more below finished grade.