Purchasing bulk landscaping materials — including crushed gravel, river stone, pea gravel, and shredded mulch — requires converting square foot surface measurements into cubic yards and freight tonnage.
Quarries and landscape supply yards sell material by the ton or cubic yard. Underestimating depth leaves weeds breaking through thin patches, while overestimating depth causes garden plant suffocation and heavy delivery surcharges.
The Contractor Volume Shortcut Formula
Volume (Cubic Yards) = (Area in Square Feet × Depth in Inches) ÷ 324
Recommended Depth Standards by Application
- Driveway Base Layer: 4 to 6 inches of 3/4\" crushed dense grade aggregate with stone dust for compaction.
- Walkway Surface / Paver Infill: 2 to 3 inches of pea gravel or decomposed granite.
- French Drains & Drainage Trenches: 8 to 12 inches of 3/4\" washed clean drain rock surrounding perforated pipe.
- Garden Flowerbed Mulch: 2 to 3 inches of organic shredded bark (prevents weed germination while retaining soil moisture).
Converting Cubic Yards to Tonnage
- 1 Cubic Yard of Crushed Stone / Gravel: Weighs approximately 1.4 to 1.5 tons (2,800 to 3,000 lbs).
- 1 Cubic Yard of Topsoil: Weighs approximately 1.1 to 1.2 tons (2,200 lbs).
- 1 Cubic Yard of Mulch: Weighs approximately 800 to 1,000 lbs.
👉 Calculate your exact gravel tonnage, mulch cubic yards, and 50lb bag counts instantly with the free CraftCalc Gravel Calculator.
Top comments (0)