Side by side
| No. 57 stone | No. 67 stone | |
|---|---|---|
| Nominal size | 1 in to No. 4 | 3/4 in to No. 4 |
| Measured weight range | 1.29 to 1.47 t/yd³ | 1.43 to 1.68 t/yd³ |
| Weight per cubic yard | 2,576 lb (1.29 t) | 2,868 lb (1.43 t) |
| Cubic yards per ton | 0.78 | 0.70 |
| Sq ft per ton at 3 in | 84 | 75 |
| Average price | – | – |
Weights and prices from the sources listed below.
Both are AASHTO M43 / ASTM D448 sizes. The lower number is the larger stone. FHWA's tests found the unit weights in the table above; see the full gradations for No. 57 and No. 67.
Working it out
Cubic yards = area × depth ÷ 324 (sq ft and inches). Tons = cubic yards × weight per cubic yard.
For 200 sq ft at 3 inches, both need 1.85 cubic yards: 2.39 tons of no. 57 stone or 2.66 tons of no. 67 stone.
Common questions
Which is heavier, no. 57 stone or no. 67 stone?
No. 67 stone at about 1.43 tons per cubic yard, against 1.29.
Related calculators
Sources
- https://www.fhwa.dot.gov/publications/research/infrastructure/structures/bridge/15034/003.cfm
- https://spinternet.dot.state.oh.us/Divisions/ConstructionMgt/OnlineDocs/Specifications/2005CMS/700/703.htm
- https://register.chattanooga.gov/sites/default/files/2024-06/73_aggregates_pages_1_16.pdf