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Crusher run calculator for Alaska

A pavement-style base layer figured at its final compacted thickness, not as loose material.

Enter your project dimensions

ft
Enter a length greater than 0
ft
Enter a width greater than 0
ft
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in
Enter a depth between 0.25 and 24 inches

After compaction, crusher run tightens by 10-15% from its loose truck condition. Ordering only to the measured depth can leave the finished base half an inch short, so the calculator has a +10% allowance turned on. This material may be listed as Pit Run, bank run, unscreened gravel in Alaska, or 2 inch minus on some tickets. Each name describes crushed stone with fines included, about 3,000 lb per cubic yard, that compacts into a firm surface under tires.

Order for compacted depth

  1. Find the footprint in feet. Multiply lane length by width, or measure the pad dimensions.
  2. Choose the required finished compacted depth: 4 inches for paths and pavers, 4-6 for driveways, and 6-8 for trucks.
  3. For yards, divide cubic feet by 27. Multiply that result by 1.5 for tons, and leave the +10% selected. Specifications list the depth after rolling.
Tons = (Area sq ft × Compacted depth in ÷ 12) ÷ 27 × 1.5 × 1.10

Tons of coverage

Compacted depth1 cubic yard covers1 ton covers
2 inches162 sq ft≈ 108 sq ft
4 inches81 sq ft≈ 54 sq ft
6 inches54 sq ft≈ 36 sq ft
8 inches41 sq ft≈ 27 sq ft

Best uses and limits

  • For driveway bases, use 4-6 inches after compaction. Add 2-3 inches of #57 or driveway gravel as the driving surface.
  • Budget rural lanes can use crusher run as the driving layer. Plan for summer dust and regrading every 2-4 years.
  • Paver and slab bases use 4 inches compacted in 2-inch lifts. The Paver Base Calculator covers the complete paver stack.
  • Use 4 inches for shed and hot-tub pads over stripped ground, or 6 on soft soil.
  • Keep it out of French drains. The fines help it bind but also retain water. Use clean #57 or drain rock for drainage.

Example: a 20 x 10 parking pad

For 200 square feet at a compacted 4 inches, calculate 200 x 0.333 = 67 cubic feet = 2.5 cubic yards, or 3.7 tons. Order 4 tons to cover the allowance. Place and compact half the material, then place and compact the remainder. Two 2-inch lifts hold up longer than a single 4-inch layer. During breakup season, use a plate compactor to help limit ruts.

Delivery guidance

  • Have the base and surface stone delivered together to keep the project timeline moving. Delivery is free either way.
  • Dump at the far end first, then work back toward the pile. On large pads, working downhill instead of uphill saves a full day.
  • Lightly mist each lift before compaction. Moist crusher run packs tighter than dry material.
  • Set aside a wheelbarrow-load for later. The material also works for pothole patches, and repairs will be needed.

Pricing details

Crusher run is made from crusher output rather than washed, sorted stone. On a 4-ton order, the +10% allowance can avoid a separate half-ton delivery. Check the Crusher Run product page for the per-ton price, compare Road Base, and order both driveway layers in one free delivery.

Crusher run, Pit Run, bank run, and unscreened gravel FAQs

How much crusher run is needed for a driveway?
Find the lane area first. Figure material at a compacted depth of 4-6 inches, convert using 1.5 tons per yard, and include 10%. A lane measuring 50 x 10 ft at 4 inches needs about 10 tons delivered.
What does a yard of crusher run weigh?
One cubic yard is about 3,000 lb or 1.5 tons, and it weighs a little more after rain. Fines fill gaps between the stones, adding weight compared with clean gravel.
How is crusher run different from gravel?
Crusher run retains stone dust, while products such as #57 are screened clean. The dust lets a base compact firmly. Clean stone drains and remains loose for surfaces and drainage. Use the base first, then the clean stone on a driveway.
Are crush and run and crusher run the same?
These are regional names for the same material family: Pit Run, bank run, unscreened gravel, and 2 inch minus. Any of these names identifies the same blend for an order.
Can crusher run serve as the final surface?
For low-traffic or rural drives, it can work as the surface. It forms a firm crust, though dry weather brings dust and the drive needs regrading every few years. Add 2 inches of #57 later to address both.
How much will crusher run shrink during compaction?
Plan for ten to fifteen percent. A loose 4-inch layer compacts to about 3.5 inches. The calculator keeps its allowance on by default for that reason, and specifications state compacted depth.
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