A sand calculator turns the size of your project into the amount of sand to order: cubic yards or cubic metres for volume, tons or tonnes for weight, and bags for smaller jobs. Use it as a sand estimator for a paver patio, a sandbox, a leveling job or an arena base. A shortfall means a second delivery, and a surplus means a pile to move, so a quick, careful calculation pays off. Enter your measurements above to get an order quantity in seconds.
It works as a sand volume calculator, a sand weight calculator and a bag counter in one, and the guide below explains the formula, coverage per yard and ton, and the sand choices for each type of project.
Multiply length × width × depth to get volume, add about 10% for waste, then multiply by the sand's density to get weight. A 4 ft × 4 ft sandbox filled 6 inches deep needs about 0.33 cubic yards, or roughly 879 lb of dry sand, once 10% is added.
How the Sand Calculator Works
The calculator finds the volume of the space you are filling, adds your waste allowance, and converts that volume to weight using the density of dry or damp sand. It then divides the weight by your bag size to count bags, and multiplies by any prices you enter. Results appear in cubic yards, cubic feet, cubic metres, pounds, kilograms, tons and tonnes, so you can match whatever unit your supplier quotes.
It assumes a flat, rectangular area of even depth. For an irregular space, split it into rectangles, calculate each, and add them, or enter the total area directly. It does not account for compaction beyond the allowance you set, and it does not size joint sand, covered below.
How to Use the Sand Calculator
- Choose imperial or metric units.
- Pick a preset (paver bedding, leveling, sandbox) or edit the depth yourself.
- Enter length and width, or switch to total area.
- Choose dry or damp sand and set a waste allowance.
- Enter the bag weight, and optionally a price per ton or per bag.
- Read the volume, weight, bags and cost, then copy the result.
Sand Calculator Formula
Volume = Length × Width × Depth
Order volume = Volume × (1 + Waste %)
Weight = Order volume × Density
Bags = rounded-up (Weight ÷ Bag weight)
Keep length, width and depth in the same unit before multiplying. The calculator converts everything to metres internally. Dry sand uses 1,600 kg/m³ and damp sand 1,800 kg/m³, and rounding happens only on the bag count at the end.
For a quick hand check, cubic yards = (length ft × width ft × depth ft) ÷ 27, or with depth in inches, cubic yards = (length ft × width ft × depth in) ÷ 324. Then tons = cubic yards × tons per cubic yard, about 1.35 for the dry sand used here.
Worked Example
A 4 ft × 4 ft sandbox filled 6 inches (0.5 ft) deep with dry sand, a 10% allowance and 50 lb bags:
| Step | Calculation | Result |
|---|---|---|
| Volume | 4 × 4 × 0.5 ft | 8 ft³ |
| With waste | 8 × 1.10 | 8.8 ft³ = 0.326 yd³ = 0.249 m³ |
| Weight | 0.249 m³ × 1,600 kg/m³ | 398.7 kg = 879 lb = 0.44 tons |
| Bags | 879 ÷ 50 = 17.58, rounded up | 18 bags |
Sand Coverage: How Far Does a Yard or Ton Go?
Coverage is the reverse question: given a quantity of sand, how much area does it cover at a set depth? One cubic yard is 27 cubic feet, so it covers 324 square feet at 1 inch deep, and coverage halves each time the depth doubles. A US ton of dry sand at 1,600 kg/m³ is about 0.74 cubic yards, so it covers somewhat less.
| Depth | Per cubic yard | Per US ton (dry) | Per cubic metre |
|---|---|---|---|
| 1 in (2.5 cm) | 324 ft² | 240 ft² | about 40 m² |
| 2 in (5 cm) | 162 ft² | 120 ft² | 20 m² |
| 4 in (10 cm) | 81 ft² | 60 ft² | 10 m² |
| 6 in (15 cm) | 54 ft² | 40 ft² | about 6.7 m² |
These figures are before waste, so reduce them by your allowance when ordering.
Sand for Pavers and Patios
A paver patio uses two sands for two jobs. Bedding sand is the screeded layer the pavers sit on, and it is the large quantity this calculator estimates. ICPI guidance calls for a nominal 1 inch layer of washed concrete sand meeting ASTM C33, and for joint sand meeting ASTM C144. Joint sand, including polymeric sand, is the fine material swept into the gaps afterwards. It is a small quantity that depends on paver size and joint width, so follow the coverage printed on the bag.
For example, a 10 ft × 12 ft patio at 1 inch needs 10 ft³, or 11 ft³ with a 10% allowance. That is about 0.41 cubic yards, roughly 1,099 lb or 0.55 tons of dry sand.
Sand for Sandboxes and Play Areas
Play sand, a washed fine sand, is the usual choice for a sandbox. Depth matters more here than for pavers because children dig, and several inches is a common minimum. A larger 8 ft × 8 ft play area at 6 inches holds 32 ft³, or 35.2 ft³ with 10% allowance. That is about 1.3 cubic yards, roughly 3,516 lb or 1.76 tons, which would be about 71 bags of 50 lb, so a bulk delivery is usually more practical at that size.
Leveling, Fill and Arena Sand
Leveling sand fills low spots under turf, pavers or flooring. The depth is whatever the dip needs, so measure it, and for uneven patches average several readings. Arena footing and other sports surfaces use sand mixes whose depth depends on the discipline and the base below, so choose Custom and enter the depth from your footing supplier's specification.
Sand Weight, Types and Moisture
Weight is where estimates drift most. Density depends on grain size, how much fine material is mixed in, and moisture. Finer, well-graded sand packs tighter and weighs more per cubic yard, and wet sand weighs more than dry because water fills the gaps. That is why the calculator offers dry, damp and custom density. If your supplier quotes tons per cubic yard or pounds per cubic foot, convert to kg/m³ (1 lb/ft³ is about 16.02 kg/m³) and use Custom. As a check, 1 tonne of dry sand at 1,600 kg/m³ occupies about 0.63 cubic metres. By size, sand is commonly grouped as fine, medium or coarse, and by source as pit, river, sea or manufactured.
Understanding Your Result
The main figure is the amount to order, waste included. Bulk suppliers usually quote by weight or by cubic yard, so use the tons or cubic yard figure for a delivery and the bag count for store-bought sand. The result is an estimate, because real density shifts with grain size and moisture. If a figure lands just under a whole bag or load, round up.
Units and Conversions
- 1 cubic yard = 27 cubic feet = 0.7646 cubic metres.
- 1 US ton = 2,000 lb = 907 kg. 1 metric tonne = 1,000 kg.
- Dry sand at 1,600 kg/m³ is about 1.35 US tons per cubic yard, and damp sand at 1,800 kg/m³ about 1.52, both inside the commonly quoted ranges of 1.3 to 1.5 and 1.5 to 1.7 tons.
- Damp sand is heavier because water fills the gaps between grains, so the same volume weighs more.
Practical Tips
- For pavers, the Interlocking Concrete Pavement Institute recommends a bedding layer about 1 inch (25 mm) thick, made from sand meeting ASTM C33. Use the Paver bedding preset for that depth.
- Joint sand between pavers is a separate, much smaller quantity that depends on joint width and paver size. For polymeric sand, follow the coverage printed on the product.
- Measure depth after compacting a base layer, not before, so the number reflects the real gap.
- Check whether your supplier prices by ton, tonne or cubic yard, and enter that unit.
- Keep sand covered if rain is forecast, since wet sand weighs more and washes away.
- For several separate areas, calculate each one and add the results rather than averaging dimensions.
- Ask your supplier whether a quote is by weight at delivery, because moisture changes the weight.
Common Mistakes
- Mixing units: entering depth in inches while length is in feet, or the reverse, throws the result off by a factor of 12.
- Skipping waste: sand spills, settles and fills hidden gaps, so an exact count usually runs short.
- Confusing tons and tonnes: a US ton is about 907 kg, a tonne is 1,000 kg.
- Using bedding depth for a sandbox: a 1 inch layer suits pavers, not play areas, which typically need several inches.
- Ignoring moisture: damp delivered sand weighs more than the dry figure.
- Treating coverage as fixed: the same yard covers half the area at twice the depth.
- Using this volume for joint sand: joint sand is a separate, much smaller amount.
Related Calculations and Use Cases
Common uses include a sand estimator for paver patios, a sandbox sand calculator for play areas, a sand volume calculator for leveling low spots, and sand coverage or sand yardage checks for walkways. If a patio also needs a compacted base, our Gravel Calculator estimates the stone layer under the sand.
Frequently Asked Questions
A 4 ft by 4 ft sandbox filled 6 inches deep holds 8 cubic feet. With a 10% allowance that is 8.8 cubic feet, about 0.33 cubic yards, or roughly 879 pounds of dry sand, which is 18 bags of 50 lb.
Divide the total weight of sand by the weight printed on the bag and round up. The calculator does this for you from the bag weight you enter. Bag sizes vary by store, so check the label.
Dry sand typically weighs about 1.3 to 1.5 US tons per cubic yard and damp sand about 1.5 to 1.7. This calculator uses 1,600 kg/m³ for dry sand (about 1.35 tons per cubic yard) and 1,800 kg/m³ for damp sand (about 1.52 tons per cubic yard).
The Interlocking Concrete Pavement Institute specifies a bedding layer about 1 inch (25 mm) thick. A 120 square foot patio at that depth needs 10 cubic feet, about 0.37 cubic yards, before waste. Joint sand is a separate, smaller amount.
Either can work, and it depends on the supplier. Bulk orders are often priced by weight and small orders by volume, so ask which unit your supplier uses. The calculator shows both.
Conclusion
This sand calculator turns length, width and depth into the volume, weight and bags you need, with a waste allowance and optional cost. Accurate measurements and a sensible depth matter most, since volume is simply area times depth and everything else follows from it. Use the sand calculator above to plan your order, then confirm the quantity with your supplier.