#57 Stone Calculator

#57 is a standard size of washed, angular crushed stone, mostly between about 1/2 and 1 inch. With no fines, water runs straight through it, which is why it is the go-to for French drains, behind retaining walls, and the middle layer of a gravel driveway.

That same lack of fines means it does not form a hard surface. On a driveway, it is usually capped with crusher run or screenings. Under a shed or a hot tub, it makes a level, draining pad.

Measure the length and width in feet, multiply for square feet, then decide the depth in inches. For odd shapes, split the area into rectangles, circles, and triangles and add them up; the calculator lets you add as many areas as you need and subtract cut-outs like a tree ring or an air-conditioner pad.

No tape measure? Open the Draw on satellite map tab, find your address, and trace the outline. Or use Pace it off: count steps along each side. Measure depth in a few spots, because ground is rarely flat.

Want the area on its own first? The lawn size calculator measures any part of your yard and carries it into the other calculators.

One cubic yard covers about 81 sq ft at 4 in deep.

A cubic yard of #57 stone weighs 2,400 to 2,800 lb (about 1.3 tons typical). Moisture is the big swing: the same pile weighs more after rain.

See every material side by side on the material weights chart.

It takes 54 bags of 0.5 cu ft to make one cubic yard, and each bag weighs about 50 lb. Bags cost more per yard but skip the delivery fee and the minimum order. Bulk is cheaper per yard once the delivery fee is spread over enough material.

With example prices of $6 a bag, $50 a yard in bulk, and $100 delivery, bulk starts winning at about 0.5 cubic yards. These are examples, not your local prices: type your own into the Order Ticket above and it recalculates the break-even.

Do not forget the labor. One cubic yard in bags means lifting 54 bags, about 2,600 lb in total, twice: into the cart and out of the car.

One cubic yard of #57 stone weighs about 2,600 lb. A full-size half-ton pickup typically carries 1,500 to 2,300 lb, and a midsize pickup 1,100 to 1,700 lb. Your exact number is on the Tire and Loading Information sticker on the driver's door jamb.

That means weight runs out first. At the low end of a half-ton's payload, you can carry only about 0.58 cubic yards per trip, even though a 6.5 ft bed holds about 2.1 level full. A bed that looks half empty can already be over the limit.

The Haul Check in the calculator does this math for your truck and your load, and tells you how many trips it takes.

• #57 is the drainage layer. It does not lock together on its own, so most driveways cap it with crusher run or screenings. (Penn State Center for Dirt and Gravel Road Studies)
• Stone names vary by state. Ask for the size (about 3/4 in to 1 in, clean) if your yard does not use the # numbers. (Penn State Center for Dirt and Gravel Road Studies)

• Using #57 alone as a driveway top. It stays loose and scatters.
• Using it in a drain without fabric, which lets soil wash in and clog it.
• Buying it by the bag for a big job. One yard is 54 bags.