How Much Decomposed Granite for a 14x18 Patio?
A 14 by 18 foot patio is 252 square feet. How much decomposed granite for a 14x18 patio depends on depth: at 3 inches it is about 2.33 cubic yards or 3.2 tons. Suppliers usually sell by the ton, so the tonnage is the number to give them.
Volume and tonnage calculator →The math for a 14x18 patio
- Area: 14 × 18 = 252 sq ft.
- Depth in feet: 3 ÷ 12 = 0.250 ft.
- Cubic feet: 252 × 0.250 = 63.0 cu ft.
- Cubic yards: ÷ 27 = 2.33 yd³.
- Tons: × 1.35 = 3.2 tons.
The volume and tonnage calculator does this for any size.
Decomposed granite needed by depth
| Depth | Cubic yards | Tons (approx.) | Tons +10% |
|---|---|---|---|
| 2 in | 1.56 | 2.1 | 2.3 |
| 3 in | 2.33 | 3.2 | 3.5 |
| 4 in | 3.11 | 4.2 | 4.6 |
About decomposed granite
Decomposed granite (DG) is weathered granite broken into small particles and fines. It packs into a firm, natural-looking path surface, and stabilized versions include a binder. Ask your supplier for their own tons-per-yard figure, since stone source and moisture shift it.
Preparing the patio
Remove sod, level the area with a slight slope away from the house, and lay landscape fabric if weeds are a concern. Edging keeps loose material inside the patio footprint. This patio sees foot traffic and furniture, so match the depth to that load rather than to the minimum.
Ordering tips
- Round up. Compaction and uneven ground eat material. Adding about 10 percent is common.
- Delivery size. 3.5 tons fits in a single typical dump truck load; small loads may carry a delivery fee. See how many tons of gravel in a dump truck.
- Bulk vs bags. At this size bulk delivery is usually the practical choice.
- Where it drops. Have the truck dump as close to the patio as firm ground allows.
When to choose decomposed granite
Good uses:
- Garden paths and patios with a natural look
- Around trees and in xeriscape designs
- Stabilized DG for accessible paths
Think twice for:
- Steep grades without a stabilizer
- Areas right outside doors, since fines track in
- Driveways with heavy turning traffic
Quick reference numbers
- Per inch over 100 sq ft: about 0.42 tons of decomposed granite (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.2 tons.
- Another size for comparison: a 20x25 area at 4 inches takes about 8.3 tons.
- Weight used here: about 1.35 tons per cubic yard.
Common estimating mistakes
- Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.
- Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
- Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
Questions people ask
How many tons of decomposed granite for a 14x18 patio?
About 3.2 tons at 3 inches deep, or 3.5 tons with 10 percent extra.
How many cubic yards is a 14x18 patio at 3 inches?
About 2.33 cubic yards.
How much does a cubic yard of decomposed granite weigh?
Usually around 1.25 to 1.45 tons, depending on stone size, fines and moisture.
How deep should decomposed granite be for a patio?
The table above shows 2 to 4 inches. Shallower depths suit top dressing; deeper depths suit new installs and heavier use.
How many square feet is 14x18?
252 square feet.
Related guides
- Crushed Stone vs Gravel: Differences and Best Uses
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Many Tons of Gravel in a Dump Truck? Loads and Coverage
- How Much Does a Ton of Gravel Cover? Depth Chart
- How Much Decomposed Granite for a 14x14 Patio?
- How Much Decomposed Granite for a 14x16 Patio?
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