Decomposed Granite Calculator

Free decomposed granite calculator

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Decomposed granite quantity for paths, patios, and xeriscape areas, with or without stabilizer.

Worked example

With these inputs:

ResultValue
Decomposed granite needed2.28 tons
Volume1.63 yd³
Area160 sq ft
Estimated total$133 – $236
Area160 sq ft
Finished depth3 in compacted
DG volume1.63 yd³
DG weight2.28 tons
DG cost$91 – $194
Surface typeStabilized
Stabilizer binder27 lb (1 × 50 lb bags)
Binder cost$42
Edging (perimeter)88 linear ft

Mix the binder into the DG dry, spread it, then water and compact in 1.5-inch lifts. Stabilized DG sheds water and resists tracking far better than loose DG, at roughly 25% more cost.

How it works

Decomposed granite compacts into a firm, natural surface, which makes it the go-to for garden paths and dry-climate landscaping. This calculator sizes both loose and stabilized DG, and adds the stabilizer binder quantity when you need a surface that holds up to traffic.

Frequently asked questions

How deep should decomposed granite be?

Two inches for decorative beds, three inches for walking paths, and four inches for patios or areas that see light vehicle traffic. Always compact in lifts rather than all at once.

What is stabilized decomposed granite?

DG mixed with a binder — usually a psyllium or acrylic-based stabilizer at roughly 12 pounds per ton — that locks the fines together into a firm, water-shedding surface that resists tracking.

How much does decomposed granite cost?

Bulk DG runs $40 to $85 per ton delivered. Stabilizer binder adds roughly $40 per 50 lb bag, and a typical path needs about one bag per ton of DG.

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