StructureCalculator

Sand Calculator

Project

Use 1–2″ of coarse concrete sand over a crushed aggregate sub-base.

Area
Depth & material
Ordering
Estimate
Tons needed—
Cubic yards—
Cubic feet—
Weight (lb)—
50 lb bags—
Truckloads (10 yd³)—
Area covered—
Coverage / ton—
Est. cost—

Estimates only. Confirm quantities and sand weights with your supplier before ordering.

A cubic yard of typical sand weighs between 1.35 and 1.5 tons, depending heavily on its moisture content and grain size. For example, a 6 × 6 ft sandbox filled 4 inches deep needs about 12 cubic feet of play sand — roughly 0.6 tons or 24 standard 50 lb bags. Enter your dimensions, depth, and sand type below for an exact estimate of tons, cubic yards, bag counts, truckloads, and cost.

Sand density and coverage by type

Approximate loose bulk density and coverage by sand type. Coverage represents the square feet one ton covers at the listed depth. Sand weight fluctuates heavily with moisture; damp or wet sand is significantly denser than dry sand.
Sand typeDensity (tons/yd³)Density (lb/ft³)Coverage at 1" (sq ft/ton)Coverage at 2" (sq ft/ton)Typical use
Mason sand (fine)1.35100240120Mortar, plaster, pools
Concrete sand (coarse)1.40104231116Concrete mix, paver base
Play sand1.35100240120Sandboxes, play areas
Polymeric sand1.40104231116Paver joints
All-purpose sand1.35100240120Traction, general fill

How to calculate sand quantities

Sand orders are estimated by volume, which is then converted into tons or bags. Multiply your area in square feet by the depth in feet and divide by 27 to find the volume in cubic yards: length × width × (depth ÷ 12) ÷ 27. Multiply the cubic yards by your sand's density — usually around 1.35 to 1.45 tons per cubic yard depending on moisture — to get the total tons needed.

Adjusting depth for different projects

Your application dictates your sand depth. For leveling beneath pavers, you need 1 to 2 inches of concrete sand (bedding sand) spread evenly over a crushed aggregate base (use the gravel calculator to size your base course). For a children's sandbox, 4 to 6 inches of washed play sand provides enough material for digging. When mixing mortar for bricklaying, you'll use fine masonry sand. If you are building a patio, consult the stone calculator for flagstone estimation. To improve lawn drainage with topdressing, broadcast 1/4 to 1/2 inch of all-purpose sand to break up clay soils.

Common miscalculations and ordering tips

  • Forgetting the waste factor. Always order at least 10% more sand than your exact calculated volume. Sand shifts, spills out of forms, and frequently settles deeper than expected as it is compacted.
  • Ignoring moisture content. Dry sand is light; damp sand is heavy. A cubic yard of bone-dry sand may weigh 1.35 tons, while the same yard of soaking wet sand can weigh over 1.6 tons. Suppliers sell bulk sand by the ton across scales, so if it rained recently, you could end up paying for a lot of water.
  • Using the wrong sand. Do not use play sand as a paver base or for mixing mortar. Play sand has smooth, rounded grains that roll over each other. Concrete and masonry sands have sharp, angular grains that interlock and compact into a stable foundation.

Paver, pool, and play sand: which product you need

Paver sand: bedding vs. joint sand

"Paver sand" is really two products doing two jobs. Bedding sand is the 1-inch leveling layer of coarse concrete sand you screed over a compacted gravel base before setting the pavers — that layer is what this calculator sizes, by area and depth. Joint sand is the fine polymeric sand you sweep into the gaps after the pavers are set; wetting it activates a binder that hardens to lock the pavers and resist weeds and washout. Joint sand isn't an area × depth job: a 50 lb bag covers roughly 75–100 sq ft of narrow joints, and less as joints widen or pavers get larger, so buy it against the manufacturer's coverage chart rather than a volume estimate.

Pool sand: base sand vs. filter sand

Pool projects also split into two unrelated needs. Base sand is the roughly 2-inch cushion of fine mason sand you level under an above-ground pool's liner to protect it from stones — a standard area × depth estimate this calculator handles (use the circle shape for a round pool). Filter sand is a different material entirely: #20-grade silica sand with 0.45–0.55 mm grains that goes inside the filter tank, and its quantity is fixed by the filter's diameter, not your yard. A 16-inch filter holds about 100 lbs; a 24-inch filter about 300 lbs. Match the exact poundage on the filter's label — never estimate filter sand by volume, and don't substitute play or all-purpose sand.

What this calculator can't estimate

This tool converts an area and depth into loose bulk volume, weight, and bags. A few sand jobs fall outside that model:

  • Filter sand by weight. Pool filter and other equipment sands are specified in pounds by the manufacturer, not by area and depth. Use the number on the tank, not this calculator.
  • Joint and polymeric sand. Sand swept into paver joints is governed by joint width and paver size against a bag-coverage table, so a bulk-volume estimate will overshoot what you actually need.
  • Delivered weight vs. estimated weight. The figures here use a loose, as-delivered density. A yard of sand that sat through rain weighs more, so a supplier selling by the ton across a scale may bill more tonnage than a dry-volume estimate predicts. Order by volume where you can.
  • Irregular or sloped areas. For L-shapes, curves, or ground that slopes, split the space into rectangles and circles, run each separately, and add the results.

About these figures: sand densities and coverage follow standard bulk-density references (USGS and Engineering ToolBox, cited below). Pool-filter and polymeric-sand quantities are typical manufacturer figures that vary by product — confirm against your filter's label or the sand bag before ordering.

Frequently asked questions

How do I calculate how much sand I need?

Measure your area's length and width in feet, multiply them together to get the square footage, and then multiply by the depth in feet. For example, a 10 × 10 ft sandbox at 6 inches (0.5 ft) deep requires 50 cubic feet (10 × 10 × 0.5), which is about 1.85 cubic yards. Multiply that by your sand's density (often around 1.35 tons per cubic yard for play sand) to get the ordering weight in tons. Always order about 10% extra for waste and settling.

How much does a cubic yard of sand weigh?

A cubic yard of sand typically weighs between 1.35 and 1.50 tons (2,700 to 3,000 lbs). The exact weight depends heavily on moisture content and the size of the grains. Dry, fine play sand might weigh around 1.35 tons per cubic yard, while damp, coarse concrete sand can weigh closer to 1.45 or 1.5 tons. When ordering bulk deliveries, always verify the product's actual weight with your local supplier.

What type of sand should I use for a paver base?

Use coarse concrete sand (also known as bedding sand) for the 1-inch leveling layer directly underneath pavers. Its coarse, angular grains lock together well to provide a stable, draining bed. Avoid fine play sand or masonry sand, as their washed, rounded grains won't interlock properly and can wash out or shift under traffic.

How deep should the sand be in a sandbox?

For a standard children's sandbox, a depth of 4 to 6 inches is ideal. This provides enough depth for digging and play without requiring an excessive amount of sand. A typical 6 × 6 ft sandbox filled to 4 inches deep will take about 1,300 lbs (or 26 standard 50-lb bags) of washed play sand.

Can I use play sand instead of masonry sand?

No, they are processed differently for different uses. Play sand is washed and screened to remove dust, and its grains are often more rounded to make it softer for play. Masonry sand is fine but retains sharper, more angular grains that help mortar mixtures bond tightly. Using play sand in mortar can result in a weaker, less durable joint.

How much area does one ton of sand cover?

At a standard 2-inch depth, one ton of typical sand (like all-purpose or mason sand) covers about 120 square feet. If you increase the depth to 4 inches — such as for a sandbox or deep leveling — that same ton will only cover 60 square feet. The actual coverage varies slightly based on the exact density and moisture of your sand.

How much sand do I need for a pool?

It depends which pool sand you mean. For the base under an above-ground pool liner, you spread about 2 inches of fine mason sand across the pool footprint — use this calculator's circle shape and your pool diameter to get the tons or bags. Pool filter sand is different: it goes inside the filter tank, uses #20-grade silica, and its amount is set by the filter's diameter, not by area. A 16-inch filter takes about 100 lbs and a 24-inch filter about 300 lbs, so match the exact weight printed on the filter's label rather than estimating by volume.

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