Sand Calculator

Bags, because that is what the search actually asks

Four of the eight People Also Ask readings collected for this page ask the same thing four ways: how much ground a 50 pound bag covers, how many bags make a cubic yard, how many fill a sandbox, how many a 12 by 12 patio takes. None of the six calculators ranking for sand calculator answers in bags: they answer in cubic yards, tons or kilograms and leave the last division to you.

It is one division. A cubic yard of dry loose sand weighs 2,400 pounds, so it holds 48 bags of 50 pounds, and one bag spreads 0.563 cubic feet — 6.75 square feet at one inch. The bag field is editable for a reason: 50 pounds is the size the search asks about, not a figure anybody published. Read the net weight off the bag you are holding.

Whatever a yard costs delivered, divide it by 48 and you have the price a bag must beat. No price ships on this sheet — type the two you were quoted and the takeoff prices both.

Dry, damp or wet: water is weight, not volume

The one thing this sheet insists on. Bags are always counted from the DRY row. Water adds weight to a pile of sand, not volume to the hole you are filling, so a damp or wet delivery scales heavier while the number of bags it takes to fill the same space is unchanged. Check the net weight printed on your bag.

Caterpillar publishes three sand rows in its earthwork volumes reference table, and they are the only densities this page computes with. The dry row reads SAND, DRY LOOSE 1420 2400 1600 2700 0.89 — five columns: loose kilograms per cubic metre, loose pounds per cubic yard, bank kilograms per cubic metre, bank pounds per cubic yard, load factor.

Our 144 square foot bed is 0.53 short tons dry, 0.63 damp and 0.69 wet — the same 0.444 cubic yards every time. Buying by weight, moisture is the difference between two tickets. Buying by volume, or counting bags, it changes nothing, which is why the bag line stays on the dry row whichever button you press.

None of the six ranking pages says where its density comes from; one offers a dry and a wet preset with no definition of either. The figure behind every number here is one table, named, linked and quoted — and you can overwrite it with your yard's own, in pounds per cubic yard or kilograms per cubic metre.

Loose, bank, and the compacted column nobody publishes

The table has a loose column, a bank column and no compacted column. Loose is what the truck dumps; bank is the undisturbed deposit, offered here as a STAND-IN for sand walked in or plate-compacted and labelled as one. It is not a compaction factor: nobody published one for sand.

Switching the patio to the bank column takes it from 0.53 to 0.6 short tons and from 22 bags to 24. Use it for what a hole holds once the sand is walked in; ignore it on a delivery ticket, because a truck dumps loose sand and weighs loose sand. No waste, compaction or settlement percentage ships as a default. One of the six ranking pages adds 15 percent and another recommends 5 to 10; neither says where it comes from. The overage field starts at zero and is yours.

Paver bedding: one screeded inch, and what sits around it

The sheet opens in bedding mode, at 1 inch: the 12 by 12 patio is the search’s own example. The figure is the Oregon State University Extension Service's, which describes screeding over pipe: Next spread a layer of sand between one and one and a half inches thick. Now, use a 2 x 4 to screed across the sand so the PVC piping is visible. Carefully remove the PVC pipe. This process ensures a uniform layer of sand one inch thick. The same guide adds it into the excavation depth as by adding together the inches required for the base (4 to 6 inches) the sand bedding (1 inch) and the paver's thickness — read the guide.

Two caveats. It is a homeowner how-to from an extension service, not a paving institute's technical specification, so follow whatever your paver manufacturer prints; and it is a screeded thickness, measured before the pavers are compacted into it. The field stays editable and the sheet cautions rather than blocks. It never names a grade of sand either: concrete, mason, fill and washed sand are sold under names that change from yard to yard, and the guide we opened says to ask — “Your material supplier can provide advice on the appropriate type of sand.”

The base course under the bedding layer is not in this takeoff, and the drawing says so: sheet C-101 does compacted aggregate base.

Area      A  =  L x W        rectangle
             =  pi x D^2 / 4  circle
             =  B x H / 2     triangle   (sum every area)
Volume    V  =  A x d / 12                (sq ft, inches -> cu ft)
Yards     Y  =  V / 27
Order     Yo =  Y x (1 + overage / 100)
Weight    Wt =  Yo x D(moisture, column)  (lb per cu yd)
Tons      T  =  Wt / 2000
Bags      B  =  ceil( Yo x D(dry, column) / bag weight )
Loads     N  =  ceil( T / payload )       (only if you enter one)

Worked example: three areas, levelled two inches deep

Bedding is not the only reason to buy sand. Here is the sheet in fill mode over three shapes at once — something exactly one of the six ranking calculators does, and that one applies a single flat conversion to every material it lists.

1. A 30 by 20 ft rectangle, a 10 by 8 ft rectangle and a 9 ft circle: 744 sq ft.
2. Two inches deep: 123.9 cubic feet, or 4.59 cubic yards.
3. Dry and loose: 5.51 short tons, 5 metric tonnes.
4. At a 10 ton payload, 1 load.
5. In bags, 221 of 50 lb — the moment the sheet tells you to price it by the yard.

Every line is on the takeoff tab with its arithmetic attached, and it exports to CSV. None of the six pages measured exports anything.

Frequently asked

How can I calculate sand needed for an area?

Area in square feet times depth in inches, divided by 12 for cubic feet and by 27 for cubic yards. The 144 sq ft patio above at 1 inch is 12 cubic feet, 0.444 cubic yards, 1,067 pounds dry.

How much area will 50 lbs of sand cover?

At 2,400 lb per cubic yard a 50 lb bag holds 0.563 cubic feet: 6.75 square feet an inch deep, 3.38 at two inches.

How many 50lb bags of sand equal 1 cubic yard?

48 bags — 2,400 pounds of dry loose sand divided by 50.

How far does 1 ton of sand cover?

2,000 pounds is 0.833 cubic yards dry: about 270 square feet an inch deep, 135 at two. Wet sand covers less per ton, not more.

How many bags of sand do I need for a 12x12 patio?

At the screeded 1 inch, 22 bags of 50 lb — 21.33 rounded up, or 0.444 cubic yards loose.

Is 2 inches of sand too much for pavers?

This sheet will not answer that; the only document it cites says This process ensures a uniform layer of sand one inch thick. What it gives you is the price of the question: the same patio goes from 22 bags at 1 inch to 43 at two.

Limits of this sheet

C-103 turns flat plan areas and a depth into a volume, a weight, a bag count and, if you enter a payload, a number of loads. It does not design a paver section, size a base course, estimate joint or polymeric sand, or account for a sloped surface. The three densities are published figures for sand in general from one engineering table — read it here — not a measurement of the pile in your yard. Quantities are for planning and ordering, not engineering.

Sheet C-103 prepared by TakeoffMetric Editorial; no author, credential or field measurement is claimed.