How to calculate crushed stone
Example: a 12 ft × 40 ft driveway base of crusher run at 6 inches is 480 × 6 ÷ 12 = 240 cubic feet = 8.9 cubic yards — about 13.3 tons at 3,000 lb per yard.
Which crushed stone should I use?
| Type | Size | Common use |
|---|---|---|
| #3 | 1–2 in | Driveway base layer, drainage |
| #57 | ¾–1 in | Driveway top layer, drainage, French drains |
| #411 | ¾ in + fines | Compactable base for patios and paths |
| Crusher run | ¾ in to dust | Compacted base for driveways, slabs, pavers |
| Stone dust | ¼ in to dust | Leveling layer under pavers and flagstone |
Stone numbers follow common US aggregate gradations; sizes and names vary a little by quarry and state, so check your supplier's product sheet.
Compaction
Stone with fines (crusher run, #411, dust) compacts by around 10–20%. If you will compact it with a plate compactor, raise the extra percentage to 10–15%.
Frequently asked questions
How many tons of #57 stone are in a cubic yard?
About 1.35 tons (2,700 lb).
How much area does a ton of crushed stone cover?
About 120 sq ft at 2 inches, 80 sq ft at 3 inches or 60 sq ft at 4 inches.
What is the difference between #57 and crusher run?
#57 is clean, washed stone without fines — it drains. Crusher run includes stone dust, so it locks together and compacts into a firm base.
How thick should a gravel driveway base be?
Typically 4–8 inches of compacted crusher run or #3 stone, topped with 2–3 inches of #57.
Related calculators
These figures are estimates for planning only. Material weights and coverage vary by supplier, moisture and compaction. Always confirm quantities and prices with your supplier before ordering. See our terms & disclaimer.