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MATERIAL CALCULATOR

Crushed stone calculator.

Calculate loose crushed-stone volume from the area and depth you supply.

KEEP YOUR PLAN

Give your project a name.

Save your measurements and quotes on this device. No account needed.

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YOUR MEASUREMENTS

Use the depth and allowance from your project specification.

Bag sizes, weight & pricing +

Bag counts and prices apply to the main material only. Enter your supplier’s density to calculate weight.

Compare bags with bulk delivery +

Use the bag size and units above. Compare the same product at your supplier’s quoted prices. Enter small-bag contents above and its price below. Include each delivery charge; enter zero for pickup.

Bulk-bag quote · optional third option

Compare small bags, bulk bags and a loose load side by side. Each price is optional; include delivery once for each option.

Minimum and increment use the bulk quote unit. For half-yard orders, enter 0.5 as the increment. Zero uses the exact estimate. Check taxes, unloading charges and access separately. Weight quotes need your supplier’s bulk density.

Gouache illustration of a pale gravel path curving between leafy garden borders.
AI-generated illustration, not a photograph of a completed project.
BEFORE YOU ORDER

Getting a useful estimate

Compacted and loose volumes differ. Enter your own purchasing allowance; this tool does not assume a compaction factor.

Measure the space you need to fill. Rectangles use length and width; circles use diameter. For several sections, choose combined areas and add rectangles, then subtract exclusions. The final area must be greater than zero.

Check loose and compacted depths

Check whether the specified thickness describes the finished compacted layer or the loose material you need to order. The calculator uses area and depth, then adds the allowance you enter.

Ask for the stone grading and bulk density on the supplier’s technical sheet. Angular crushed stone and rounded decorative stone have different uses. Follow your contractor’s design for a driveway that carries vehicles.

Gravelshop: Hard Rock Mix (3/4 inch)

Volume formula

Volume = area × depth × (1 + allowance ÷ 100)

Allowance applies once to each volume layer. No density or compaction factor is assumed. If buying by weight, enter the density for your supplier’s product in the units shown.

A worked example

An example 16-foot by 8-foot rectangle filled 4 inches deep needs 42.667 cubic feet, or 1.580247 cubic yards, without allowance. A 10% allowance gives 47 cubic feet. These are arithmetic examples, not recommended depths.

Buying and checking quantities

Enter the volume printed on a bag, or its mass alongside supplier density. Counts round up to full bags. Costs use the purchasing unit and price you enter. Delivery is separate; labor and installation are outside this estimate. Copy or print your list to check with your supplier.

Sources & what they cover

  • NIST SI conversion factorsNational Institute of Standards and Technology

    Exact US customary and SI conversion factors; no material or installation recommendations.

    Source checked
  • Hard Rock Mix (3/4 inch)Gravelshop

    One supplier’s angular crushed-stone product. Supplier ton convention is not inferred.

    Source checked

We check what each reference covers. A source check does not mean a specialist has reviewed this tool. You supply the depths, densities, prices and blend proportions.

Operated by Pete CallaghanUpdated Not yet independently reviewedHow we check our toolsReport a correction