How much does a yard of #57 stone weigh?

About 1.4 tons, or roughly 2,800 pounds per cubic yard loose. Washed limestone #57 can run a little heavier and granite a little lighter, so check your quarry's figure if you are ordering by the ton for a large job.

How many square feet does a ton of #57 stone cover?

About 58 square feet at 4 inches deep, 77 square feet at 3 inches and 116 square feet at 2 inches. A ton is about 0.71 cubic yards, or 19.3 cubic feet, and coverage is that volume divided by the depth in feet.

What size is #57 stone?

It is ASTM D448 size No. 57: stone that passes a 1 inch sieve almost entirely and is mostly retained on a No. 4 sieve (about 3/16 inch), so the pieces run from about 1 inch down to 3/16, most around 3/4 inch. That is why suppliers also sell it as 3/4 inch clean or 3/4 inch crushed stone.

How many bags of #57 stone make a ton?

About 39 bags of 0.5 cubic feet, because a ton of #57 is about 19.3 cubic feet. At typical bagged prices that is several times the cost of bulk stone, so bags make sense for small jobs like post holes, footing pads or a window well.

What is #57 stone used for?

Drainage and clean base: French drains, pipe bedding, gravel pads under deck blocks and sheds, the drainage zone behind retaining walls, and a loose top layer on driveways. It is the wrong choice where you need a surface that locks hard — use crusher run for that.

Volume & Weight

#57 Stone Calculator

#57 is the clean, washed three-quarter-inch crushed stone every quarry stocks and most drainage and base jobs call for. It weighs about 1.4 tons per cubic yard loose, so a ton covers roughly 58 square feet four inches deep. Enter the area and depth for tons, cubic yards, bags and a cost range, plus how far one ton goes at your depth.

What #57 stone is

The number is a sieve size from ASTM D448, the standard for graded construction aggregate. Size No. 57 is stone that almost all passes a 1 inch sieve and is almost all held on a No. 4 sieve (about 3/16 inch), so the pieces run from about an inch down, with most around three quarters. It is crushed, angular and washed, which is why yards sell it as "3/4 inch clean" or "3/4 inch crushed stone". The washing is the point: with the fines gone, water runs straight through it.

The formula

Cubic yards = length (ft) × width (ft) × depth (in) ÷ 12 ÷ 27. Tons = cubic yards × 1.4. For a 20 × 12 ft pad 4 inches deep: 240 × 4 ÷ 12 ÷ 27 = 2.96 cubic yards; add 10% and it is 3.26 cubic yards, or 4.56 tons — about 176 bags of 0.5 cubic feet, which is why anything beyond a small job is ordered in bulk.

How far a ton of #57 goes

Depth	Coverage per ton	Typical use
2 in	116 sq ft	Top dressing an existing driveway
3 in	77 sq ft	Walkways, under a deck, driveway top layer
4 in	58 sq ft	Shed base, slab sub-base, deck block pads
6 in	39 sq ft	Drainage bed, behind a retaining wall

A ton is 1 ÷ 1.4 = 0.71 cubic yards, or 19.3 cubic feet; divide by the depth in feet for the coverage.

Where #57 is the right stone — and where it is not

Yes: French drains (French drain calculator), pipe bedding, retaining wall drainage, footing and deck block pads, and a loose top layer on a driveway.
No: a base that has to lock hard. #57 has no fines to bind it, so it stays loose; use crusher run (crushed stone calculator) or paver base instead.

Building on precast deck blocks? Each block wants a tamped pad of #57 about 24 in square and 4 in deep — the deck block calculator counts the blocks and the gravel for their pads, and the deck footing calculator covers poured footings, which also sit on a few inches of this stone.

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Frequently asked questions

How much does a yard of #57 stone weigh?: About 1.4 tons, or roughly 2,800 pounds per cubic yard loose. Washed limestone #57 can run a little heavier and granite a little lighter, so check your quarry's figure if you are ordering by the ton for a large job.
How many square feet does a ton of #57 stone cover?: About 58 square feet at 4 inches deep, 77 square feet at 3 inches and 116 square feet at 2 inches. A ton is about 0.71 cubic yards, or 19.3 cubic feet, and coverage is that volume divided by the depth in feet.
What size is #57 stone?: It is ASTM D448 size No. 57: stone that passes a 1 inch sieve almost entirely and is mostly retained on a No. 4 sieve (about 3/16 inch), so the pieces run from about 1 inch down to 3/16, most around 3/4 inch. That is why suppliers also sell it as 3/4 inch clean or 3/4 inch crushed stone.
How many bags of #57 stone make a ton?: About 39 bags of 0.5 cubic feet, because a ton of #57 is about 19.3 cubic feet. At typical bagged prices that is several times the cost of bulk stone, so bags make sense for small jobs like post holes, footing pads or a window well.
What is #57 stone used for?: Drainage and clean base: French drains, pipe bedding, gravel pads under deck blocks and sheds, the drainage zone behind retaining walls, and a loose top layer on driveways. It is the wrong choice where you need a surface that locks hard — use crusher run for that.