Sand Calculator

Estimate sand volume, weight, and bag count from area dimensions, depth, density, and waste allowance for levelling, fill, and bedding projects.

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Enter values Provide length, width, depth, and density to estimate sand volume, weight, and bag count.

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Sand calculator for pavers, patios, sandbox fill, tons, and bag count

A sand calculator estimates how much sand to order for paver bedding, patio base layers, sandbox fill, or general construction from project dimensions and depth. It converts area and depth into cubic feet, cubic yards, tonnage, and bag count so the result matches how sand is commonly sold in bulk or in bags.

What a sand calculator measures

Sand quantity starts with area and depth. The calculator multiplies the project footprint by the fill depth to get raw volume in cubic feet, then converts that number into cubic yards for bulk orders and into weight using the selected density assumption.

That makes the result useful for paver sand, sandbox fill, patio levelling, and small construction jobs where the supplier may quote by cubic yard, by ton, or by the bag. Different sand types have different bulk densities, so the weight result changes even when the volume stays the same.

Core sand formulas and density assumptions

The main calculation is simple geometry: area in square feet times depth in feet gives cubic feet. The calculator then converts cubic feet into cubic yards by dividing by 27, and into weight by multiplying by the density you enter.

That density input matters because dry mason sand, concrete sand, and wetter fill sand can all produce different tonnage and bag counts for the same footprint. If your supplier gives a product-specific density or coverage figure, use that value instead of a generic assumption.

Area = Length x Width

The calculator starts by finding the footprint that needs to be filled.

Cubic feet = Area x (Depth / 12)

Depth is converted from inches to feet before computing volume.

Cubic yards = Cubic feet / 27

Bulk sand is commonly sold by the cubic yard, so the calculator converts volume into that unit.

50 lb bags = Ceiling((Cubic feet x Density) / 50)

Bag count rounds up so the estimate matches a real retail purchase.

How to use the sand result

Use cubic yards when comparing bulk delivery quotes, tons when the supplier prices by weight, and 50 lb bags when buying retail. If the project has irregular edges, a loose spread, or a bedding layer that will compact, add a small waste allowance before ordering.

For pavers, a bedding sand layer is often around 1 inch, while sandbox and levelling jobs may need a different depth depending on the finish you want. Running the calculator with the actual finished depth gives a much better order estimate than guessing from area alone.

What this result does not cover

This calculator does not account for irregular edges, settlement after watering, compaction from traffic, or supplier-specific bag weights. It also does not replace installation instructions for the exact paver or permeable pavement system you are using.

Use it as an order-planning tool, then confirm the exact bedding depth, sand type, density, and packaging with the product or supplier before you buy.

Frequently asked questions

How much sand do I need for a paver base?

Multiply the paver area in square feet by the bedding depth (usually 1 inch) converted to feet, then divide by 27 for cubic yards. A 200 sq ft patio at 1 inch deep needs roughly 0.62 cubic yards of sand.

 How deep should sand be under pavers?

A common bedding layer is around 1 inch, but the exact depth depends on the paver system, the base preparation, and the manufacturer instructions. Permeable pavement and concrete paver systems may call for different bedding materials and thicknesses.

 How many 50 lb bags are in a cubic yard of sand?

It depends on the sand density, but a cubic yard is 27 cubic feet and often works out to dozens of 50 lb bags. The calculator uses the density you enter so the bag estimate reflects the specific sand you expect to order.

 How heavy is a cubic yard of sand?

Dry sand typically weighs around 2,600 to 2,900 pounds per cubic yard depending on type and moisture content. Wet sand is heavier. Always confirm the density with your supplier for accurate ordering.

 What is the difference between mason sand and concrete sand?

Mason sand is finer and screened for smooth finishes, making it suitable for paver joints and sandboxes. Concrete sand is coarser and used in concrete mixes and structural bedding. The density differs, which affects how much weight you order for the same volume.

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