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Crusher run calculator for Delaware

For a pavement-like base, calculate the compacted layer rather than estimating loose material.

Enter your project dimensions

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

After rolling, loose crusher run tightens by 10-15%. Buying only for the measured depth can leave the finished base half an inch shallow, so the calculator has its +10% allowance enabled. It is also called CR-6, dense graded, GABC in Delaware, or 2 inch minus on certain tickets. These names describe crushed stone that retains its fines, weighs about 3,000 lb per cubic yard, and compacts into a driving surface that tires do not easily displace.

Calculate for compacted depth

  1. Find the footprint in feet by multiplying lane length by width, or by measuring the pad dimensions.
  2. Use the required finished compacted depth: 4 inches for pavers and paths, 4-6 for driveways, and 6-8 beneath trucks.
  3. For yards, divide cubic feet by 27; then x 1.5 for tons and leave the +10% selected. Depth specifications apply 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 a driveway, compact 4-6 inches for the base and add 2-3 inches of #57 or driveway gravel as the driving layer.
  • Crusher run can serve as the only surface on budget rural lanes. It forms a usable crust, though summer brings dust and grading is needed every 2-4 years.
  • Paver and slab bases use 4 inches, placed and compacted in 2-inch lifts. Use the Paver Base Calculator for the complete paver layers.
  • Strip the ground first, then use 4 inches for shed and hot-tub pads, or 6 where the soil is soft.
  • Do not use it in a French drain. The fines that help it lock together also retain water, so use clean #57 or drain rock for drainage.

Worked example: 20 x 10 parking pad

At 4 inches compacted, two hundred square feet requires 200 x 0.333 = 67 cubic feet = 2.5 cubic yards, or 3.7 tons. With the allowance, order 4 tons. Place and compact half first, then repeat with the remaining material. Two 2-inch lifts hold up longer than a single 4-inch placement. A plate compactor rental for the afternoon can cost less than repairing an early pothole. Ruts after the second delivery can reveal where compaction was skipped.

Delivery guidance

  • Have the base and surface stone delivered together to keep the work moving. Delivery is free either way.
  • At the far end, place the material first and work back toward the pile. On large pads, spreading downhill rather than uphill saves a full day.
  • Lightly mist each lift, then compact it. Wet crusher run tightens more than dry material.
  • Set aside a wheelbarrow-load for touchups. Crusher run can be used for pothole patches when needed.

Pricing details

Because it comes straight from crusher output instead of washed and sorted stone, crusher run is commonly the lowest-cost structural material at a stone yard. The +10% allowance on a 4-ton order is low-cost protection against needing another half-ton delivery. See the Crusher Run product page for the per-ton price, review Road Base too, then place both driveway layers in one free delivery.

Crusher run, CR-6, dense graded, GABC: common questions

How much crusher run is needed for a driveway?
Start with the lane area and a compacted depth of 4-6 inches, then convert using 1.5 tons per yard and include 10%. A 50 x 10 ft lane at 4 inches comes to about 10 tons.
What does a yard of crusher run weigh?
A cubic yard weighs about 3,000 lb, or 1.5 tons, with a little added weight after rain. Fines fill the gaps among the stone, accounting for its greater weight than clean gravel.
How are crusher run and gravel different?
Stone dust remains in crusher run, while #57 gravel is washed clean. The dust lets the material bind tightly for bases; clean stone stays open for drainage and surface layers. A driveway uses them in that order.
Are crush and run and crusher run the same?
These are local names for one material family. CR-6, dense graded, GABC, and 2 inch minus describe the same blend, regardless of the name used to order it.
Can crusher run serve as the finish layer?
For low-traffic and rural driveways, it can. It forms a hard crust that holds up through weather, but dry periods cause dust and regrading is needed every few years. Adding 2 inches of #57 later addresses both.
How much does crusher run shrink during compaction?
Compaction is typically ten to fifteen percent. Spread 4-inch material loose and it rolls down to about 3.5 inches. That is why the calculator starts with an allowance and specifications use compacted depth.
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Crusher run sold by the ton with free delivery.

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