Just enter the length, width, and depth of the area you want to cover, and the calculator will give you the total volume in cubic yards.
Decomposed granite (DG) is a popular and affordable material used for landscaping, pathways, patios, and garden beds. It’s crushed granite that compacts well and provides a natural look. To ensure you purchase the right amount, use this Decomposed Granite Calculator to estimate the required volume, weight, and total cost based on your project's dimensions.
Formula Used
1. Volume (in cubic yards)
To find the volume of decomposed granite required:
Formula:
Volume (cubic yards)=324Length (ft)×Width (ft)×Depth (in)
Why 324? Because: 1 yard³ = 27 ft³ Depth (in inches) must be converted to feet
2. Weight (in tons)
Once we have the volume, we multiply it by the average density of decomposed granite.
Formula:
Weight (tons)=Volume (yd3)×1.35
Average density of decomposed granite is 1.35 tons per cubic yard.
3. Total Cost
Formula:
Total Cost=Weight (tons)×Price per ton
Example
Let’s say you are creating a DG pathway that is:
- Length: 20 ft
- Width: 6 ft
- Depth: 3 inches
- Price per ton: $45
Step 1: Calculate Volume
Volume=32420×6×3=324360≈1.11 yd3
Step 2: Calculate Weight
Weight=1.11×1.35≈1.50 tons
Step 3: Calculate Total Cost
Cost=1.50×45=67.5
✅ You’ll need approximately 1.5 tons of DG, which will cost around $67.50.
Final Thoughts
Using this calculator, you can avoid over- or under-purchasing decomposed granite. It’s especially helpful when you’re working on a budget or ordering in bulk.
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