Decomposed Granite Calculator
Calculate how much decomposed granite (DG) you need for paths, patios, and xeriscaping projects.
Results
Visualization
How It Works
Decomposed granite (DG) is granite rock that has naturally weathered into small fragments and fine particles. It creates a natural, rustic look for paths, patios, and drought-tolerant landscapes, and it compacts well for a relatively firm walking surface.
The Formula
Volume (cu ft) = Length x Width x Depth / 12
Cubic Yards = Volume / 27
Tons = Cubic Yards x 1.35
Cubic Yards = Volume / 27
Tons = Cubic Yards x 1.35
Variables
- L — Length of the area in feet
- W — Width of the area in feet
- D — Desired depth in inches
- 1.35 — Approximate weight of decomposed granite in tons per cubic yard
Example
A 20 ft x 4 ft garden path at 2 inches deep needs 13.3 cu ft = 0.49 cubic yards = 0.67 tons. At $55/ton that costs about $37.
Tips
- DG with stabilizer resin creates a firmer surface that resists erosion and stays in place.
- Plain DG is the cheapest option but will wash away in heavy rain without proper edging and grading.
- Apply DG in 1-inch layers, compacting each layer before adding the next.
- DG is ideal for xeriscaping and drought-tolerant landscapes because it allows water to permeate.
- Available in gold, tan, brown, and red tones to match your landscape color scheme.