Guides / Crushed Stone USA
Crushed Stone Calculator Guide for U.S. Units
Reviewed: September 24, 2026
U.S. aggregate quotes commonly mix feet, inches, cubic yards, short tons, and truckloads. This guide keeps those units explicit so a measured layer can be compared with a quarry or landscape-yard quote.
U.S. customary-unit method
Short tons = [length ft × width ft × (depth in ÷ 12) ÷ 27] × tons per yd³
Reference basis: fixed unit conversions follow the NIST SI conversion tables. Bulk density is product- and condition-specific; the FHWA Field Materials Manual documents aggregate sampling and moisture-density testing; supplier or project data for the actual product and condition should replace the planning preset when available. The USGS aggregates program is used for aggregate terminology and scope. Read the full methodology and limitations.
A ton on these pages means a 2,000-lb short ton. Do not assume a metric tonne or 2,240-lb long ton when checking a quote. The density input must be in short tons per cubic yard for the units to remain compatible.
Checked parking-pad example
A 42 ft by 26 ft pad at a 5 in installed depth contains 42 × 26 × (5 ÷ 12) = 455 ft³. Dividing by 27 gives 16.85 installed yd³. If the entered density of 1.60 short tons/yd³ describes that installed state, the base weight is 26.96 short tons; a 10% stated field allowance gives 29.66 short tons before the quarry's loading increment.
The 1.60 value demonstrates the conversion; it is not a national density standard. If the quarry value describes loose delivered yards, use a documented loose-to-installed yield factor before applying it to the installed geometry. Product gradation, source, moisture, and condition can move the actual tons-per-yard relationship.
Product name is not enough
| Quote detail | Why to record it |
|---|---|
| Exact product or gradation | Clean #57 is commonly an open-graded product; crusher run or another dense-graded base contains fines and serves a different function. Confirm the local specification. |
| Bulk density or conversion | It connects geometric volume to scale weight only when the density and volume describe the same state. |
| Quoted ton definition | It prevents a short-ton, long-ton, or metric-tonne mismatch. |
| Minimum and maximum load | It controls truck count and supplier rounding. |
| Delivery and placement scope | A dump fee, tailgate spreading, and machine placement are not the same service. |
Depth, compaction, and multiple courses
Enter the finished depth of one specified course. A six-inch pavement section made from two materials is not one six-inch crushed-stone calculation unless both layers truly share the same product and density. Preserve each course as its own row in the takeoff.
Waste covers defined losses such as edge irregularity or unavoidable handling. Compaction describes a state change. Use a separate loose-to-compacted factor only when the supplier or project provides one; otherwise, combining arbitrary percentages can double-count the same uncertainty.
Questions this guide answers
What does “ton” mean in this crushed-stone guide?
It means a U.S. short ton of 2,000 lb. Confirm the supplier uses the same definition.
Can cubic yards be converted to tons without density?
No. Volume-to-weight conversion requires a bulk-density assumption for the exact product and condition.
Should #57 stone and crusher run use the same density?
Do not assume so. Their gradation and fines differ, and regional product names are inconsistent. Use the quarry's data.
When should I round the tonnage?
Keep the unrounded result, apply a defined allowance, then round to the quarry's scale or truckload policy.