#57 Stone
Clean, washed crushed stone graded roughly ¾ to 1 inch with no fines — the standard drainage aggregate. Used in french drains, behind retaining walls, and under slabs where water must flow. Does not compact tight, which is exactly its job.
Where this appears in real estimates
This term isn't trivia — it's a working variable. These tools use it directly:
- french drain calculator — Drainage gravel, pipe and fabric for french drain trenches.…
- gravel calculator — Gravel tonnage and cost by area and depth, with densities for loose, crushed, pea and rive…
- retaining wall calculator — Wall blocks, cap units and drainage gravel from wall length and height.…
Go deeper
- Gravel vs Asphalt Driveway — head-to-head decision guide
- Solar + Efficiency Payback Plan — full project walkthrough
- HVAC Size in New York — local pricing & climate
- Read the field guide on the blog — practitioner-level detail
- Related engineering article — from our licensed engineer
Reviewed: · Part of the CalculatorAsphalt Construction Glossary · Sources: see methodology & standards.