Paver Sand Calculator: Volume and Weight for Patios

What Is a Paver Sand Calculator?

A paver sand calculator estimates how much sand is needed to build the sand bed under patio or driveway pavers. It multiplies the area of the paved surface by the depth of the sand layer, then converts that volume into a weight so the material can be ordered and hauled.

Why Sand Goes Under Pavers

Pavers rest on a layer of sand called the bedding layer. It is usually 1 to 2 inches (2.5 to 5 centimeters) deep. This layer lets an installer level each paver precisely and lets water drain away from the surface. A second, thinner layer of sand, called joint sand, is swept into the gaps between pavers after they are laid. Joint sand locks the pavers together and keeps weeds from growing between them. This calculator estimates the bedding layer, which uses most of the sand on a typical project.

How to Calculate Paver Sand: The Formula

Sand volume equals length times width times depth:

$\text{Sand Volume} = \text{Length} \times \text{Width} \times \text{Depth}$

The exact formula depends on the unit system.

Imperial units (feet and inches)

$\text{Volume (yd}^3\text{)} = \frac{\text{Length (ft)} \times \text{Width (ft)} \times \left(\text{Depth (in)} \div 12\right)}{27}$

Dividing by 12 turns the depth from inches into feet. Dividing by 27 turns cubic feet into cubic yards, the unit sand is usually sold in in the United States.

Metric units (meters and centimeters)

$\text{Volume (m}^3\text{)} = \text{Length (m)} \times \text{Width (m)} \times \left(\text{Depth (cm)} \div 100\right)$

Dividing by 100 turns the depth from centimeters into meters.

Converting volume to weight

Dry sand has a bulk density of about 1,600 kilograms per cubic meter (roughly 100 pounds per cubic foot). That same density, converted into imperial units, is about 1.35 short tons per cubic yard (about 2,700 pounds per cubic yard). Multiplying volume by this density gives an estimated weight:

$\text{Weight (tons)} = \text{Volume (yd}^3\text{)} \times 1.35$

$\text{Weight (tonnes)} = \text{Volume (m}^3\text{)} \times 1.6$

Both formulas describe the same sand, so a given slab should return close to the same weight whichever unit system is used. Actual weight varies with moisture: wet sand can weigh 15 to 20 percent more than dry sand.

Worked Examples

Example 1 (imperial): a 12 ft × 10 ft patio, 1.5 in sand bed

Volume in cubic feet: 12 × 10 × (1.5 ÷ 12) = 15 ft³

Volume in cubic yards: 15 ÷ 27 ≈ 0.56 yd³

Weight: 0.56 × 1.35 ≈ 0.75 tons, or roughly 1,500 pounds.

Example 2 (metric): a 4 m × 3 m patio, 4 cm sand bed

Volume: 4 × 3 × (4 ÷ 100) = 0.48 m³

Weight: 0.48 × 1.6 ≈ 0.77 tonnes.

Example 3 (imperial): a 24 ft × 12 ft driveway, 1.5 in sand bed

Volume in cubic feet: 24 × 12 × (1.5 ÷ 12) = 36 ft³

Volume in cubic yards: 36 ÷ 27 ≈ 1.33 yd³

Weight: 1.33 × 1.35 ≈ 1.80 tons, or roughly 3,600 pounds.

How to Use the Calculator

1. Measure the length and width of the paved area in feet or meters.
2. Choose a sand bed depth. Most patios and walkways use 1 to 2 inches (2.5 to 5 centimeters) after compaction.
3. Select imperial or metric units. Both dimensions should be entered in the same system.
4. The calculator returns the sand volume and its estimated weight.

The volume figure is what to order from a supplier, since sand is sold by volume. The weight figure matters for transport: a vehicle or delivery truck needs enough payload capacity to carry the load safely.

Contractors commonly add 5 to 10 percent to the calculated volume to cover spillage and an uneven base. Compacting sand also reduces its volume by roughly 15 to 25 percent, so installers often screed the loose sand slightly higher than the final target depth.

Types of Sand Used Under Pavers

Concrete sand, also called sharp sand or coarse sand, is the standard choice for the bedding layer. Its particles are 2 to 4 millimeters across with angular edges that interlock when compacted, which keeps the layer stable and lets water drain through it.

Mason sand has finer, more rounded particles. It compacts too densely for a bedding layer, which can trap water, so it is mainly used for joints in some traditional installations.

Polymeric sand is a manufactured joint sand containing a binder that hardens when wet. It resists washout and is more resistant to weeds than plain sand, but it is meant only for joints, not for the bedding layer.

Frequently Asked Questions

How much sand do I need for pavers?

It depends on the paved area and the sand bed depth, usually 1 to 2 inches (2.5 to 5 centimeters). A 10 ft × 12 ft patio with a 1.5-inch bed needs about 0.56 cubic yards, roughly 30 bags of sand at 50 pounds each. Enter exact dimensions into the calculator for a precise figure.

What is the formula for calculating paver sand?

Multiply length by width by depth, keeping all three measurements in the same unit system, then convert to cubic yards or cubic meters. In imperial units: (length in feet × width in feet × depth in inches ÷ 12) ÷ 27. In metric units: length in meters × width in meters × depth in centimeters ÷ 100.

How much does a cubic yard of paver sand weigh?

About 2,700 pounds, or roughly 1.35 tons, based on a dry sand density of 1,600 kilograms per cubic meter. Actual weight varies with moisture content and sand type, typically between 2,600 and 3,000 pounds per cubic yard.

What type of sand is best for a paver base?

Concrete sand, also called sharp sand, is the standard material for the bedding layer beneath pavers. Its angular particles interlock under compaction while still allowing water to drain. Mason sand is too fine for this layer and is better suited to joint filling.

How deep should the sand layer be under pavers?

Most residential patios and walkways use a compacted depth of 1 to 2 inches (2.5 to 5 centimeters). Driveways carrying vehicle weight often use a thinner sand layer, around 1 inch, over a deeper compacted gravel base.

Can playground sand be used under pavers?

No. Playground sand has fine, rounded particles designed to be soft, not structural. It does not interlock under compaction, so pavers laid on it tend to shift and settle unevenly, and it drains poorly compared with concrete sand.

How many 50-pound bags of sand equal one cubic yard?

About 54 bags. One cubic yard of sand weighs roughly 2,700 pounds, so dividing by 50 pounds per bag gives approximately 54 bags.