Free tool

Bluestone Calculator

Square footage is the easy part. What catches people out is the waste factor on a patterned layout and the weight on the back of a truck. Enter your dimensions and this gives you all three.

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Material

Why the waste factor is not padding

Order exactly the square footage you measured and you will run short. Every cut produces an offcut that cannot be used elsewhere, and bluestone arrives with natural variation in colour and thickness that means some pieces get set aside. Ten percent covers a straightforward rectangular patio with square edges. A pattern with diagonal cuts wants fifteen. Curves and irregular borders can run twenty, because every piece along the edge gets scribed and trimmed.

Running short mid-job is the expensive outcome. A second delivery costs a second delivery charge, and stone from a later batch will not always match the first for colour.

The weight is what decides delivery

Bluestone weighs roughly fourteen to sixteen pounds per square foot for every inch of thickness. A modest sixteen by twenty patio in inch and a half thermal comes to well over four thousand pounds before waste, which is more than a half-ton pickup should ever carry and more than most trailers are rated for.

This is the number people underestimate most often. If the total above is more than about a thousand pounds, plan on delivery rather than collection, and make sure there is somewhere on site a truck can reach and set pallets down.

Thickness by application

One inch suits walkways and light foot traffic over a proper base. Inch and a half is the standard for patios and is what most residential work uses. Two inch handles vehicle traffic and heavy use. Three inch is for treads and steps where the stone spans without full support beneath it. Going thinner than the application calls for is the most common cause of cracked stone a season or two later.

What to do with these numbers

Take the square footage with waste included when you order — that is the real quantity. Use the pallet count to plan the drop and the staging area. Use the weight to decide whether you are collecting or we are delivering. If the project is unusual, or you are matching existing stone, call it through rather than ordering blind.

Free to use and free to link. If you are a contractor or landscape designer and want to hand this to clients, take it.