Crusher Run Calculator
Crusher run — also called crush-and-run or three-quarter-inch minus — mixes angular stone with the stone dust left in, so it packs down into a hard, stable surface. It is the go-to base for driveways, sheds, and paver patios.
Bags are always rounded up. Order about 5–10% extra for settling and waste — this is a planning estimate only, not a guaranteed quantity. Density is typical; confirm the exact figure with your supplier.
Density
| Typical density | 1.5 t/yd³ |
|---|---|
| Range | 1.4–1.6 t/yd³ |
| Default depth | 4 in |
| Source | Reviewed default — published loose/delivered figures span ~1.2–1.5 t/yd³ (vCalc; aggregate suppliers); held at the safe over-order end because crusher run also needs 15–20% extra for compaction. Confirm with your supplier. |
Worked example
A 10 ft × 10 ft area at 4 in deep is 33.3 cubic feet — about 1.23 cubic yards, roughly 1.85 tons at 1.5 t/yd³, or 67 half-cubic-foot bags. Add 5–10% for settling.
Use notes
- Compact in two-inch lifts with a plate compactor for a firm, load-bearing base.
- The fines bind when damp, so a light water spray helps it lock up tight.
- Four inches is typical under a driveway; add depth over clay or poorly drained ground.
Frequently asked questions
What is the difference between crusher run and #57 stone?
Crusher run keeps the stone dust so it compacts hard; #57 is washed clean of fines so it drains but stays loose. Use crusher run for a base you can drive on.
How thick should crusher run be for a driveway?
Four inches compacted is a common minimum for cars. Heavier vehicles or soft ground call for six inches or more, built up in lifts.
How much does crusher run weigh per cubic yard?
Around 1.4 to 1.6 tons per cubic yard because the fines fill the voids. Verify with your supplier for an exact figure.
Related gravel calculators
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- #57 Crushed Stone Size #57 crushed stone in cubic yards, tons, or bags for driveway base and drainage.
- All Gravel calculators Angular and rounded stone for driveways, drainage, paths, and paver bases — estimate any grade by the yard, ton, or bag.