Crushed Stone Calculator

The calculator converts your rectangular project area into volume using length × width × depth. Depth is entered in inches and converted to feet. Cubic feet are then converted to cubic yards, the unit commonly used to describe bulk aggregate volume.

A waste allowance is added before tonnage is estimated. This helps account for small grade variations and handling losses, but it is not a substitute for a supplier's compaction recommendation.

Finally, the calculator multiplies cubic yards by the editable bulk density. The default is 2,700 lb per cubic yard, equal to 1.35 U.S. tons per cubic yard.

Crushed stone is sold in many gradations. A product with fines can pack more tightly than clean, uniformly sized stone, and that changes the weight of a cubic yard. Moisture content can also move the scale reading.

For a purchase order, the supplier's stated tons-per-yard or pounds-per-cubic-yard value should take priority over any generic calculator default. CountMaterials keeps density editable for that reason.

If a project has multiple layers, calculate each layer separately. For example, a deep base course and a thinner surface layer may use different products with different densities and prices.

The cost result covers only the estimated stone tonnage at the price per ton you enter. Delivery, taxes, minimum-load charges, grading, excavation, geotextile, drainage work, edging, and compaction equipment are not included.

This is a quantity estimator, not a structural design tool. Pavement, foundation, retaining-wall, and load-bearing base specifications should follow project drawings, local requirements, and supplier or professional guidance.