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How Much Gravel for 16×8 ft at 6 Inches Deep?
16×8 ft of ground at 6 inches needs this much gravel, converted to cubic yards, tons and 50 lb bags. Here is the answer, plus a calculator you can adjust if your measurements are slightly different.
Answer: 2.37 cubic yards
How it changes with depth (in)
Same area, different depth (in):
| Depth (in) | 2 | 4 | 6 |
|---|---|---|---|
| Gravel needed | 0.79 cubic yards | 1.58 cubic yards | 2.37 cubic yards |
| Depth | 2 in | 4 in | 6 in |
What 16×8 ft at 6 inches deep actually involves
16×8 ft at 6 in is 3.32 tons: a small bulk order. It is 5 pickup loads if you collect it, or one small dump delivery. Collecting it yourself is usually cheapest, but check the real payload of your truck: a half-ton pickup is only rated for about 1,000 lb, which is a third of a cubic yard, and most people quietly overload it. Go by the rated payload, not by what fits.
The area is 128 ft². At 6 in deep that is 64.0 ft³ of stone, or 2.37 yd³. Gravel is sold by weight, so the number that matters at the yard is 3.32 tons, assuming the usual ≈1.4 tons per cubic yard. Everything below is worked out from those figures.
Base course or surface dressing?
6 in is base-course depth for a driveway or parking area. Stone this deep only works if it is placed in two lifts and compacted between them — dumping 6 in at once leaves the lower half loose, and the surface will rut the first time a loaded vehicle crosses it. Below the gravel you still want geotextile or a compacted sub-base on soft ground.
Match the depth to the job rather than picking a number:
| Use | Depth | What goes below |
|---|---|---|
| Decorative bed, top-up | 2 in | woven weed fabric over soil |
| Garden path, foot traffic | 2–4 in | compacted sub-base or fabric |
| Driveway surface layer | 2–3 in | 4–6 in compacted crushed base |
| Driveway base, bare ground | 6 in+ | geotextile on soft soil |
Ordering: bags, tons or trucks
| Option | Quantity | Estimated cost |
|---|---|---|
| 50 lb bags | 133 bags | $798 |
| Bulk, loose | 2.37 yd³ — 3.32 tons | $107 |
| Pickup collection | 5 trips | $107 + fuel |
| Dump truck delivery | 1 load | $107 + delivery |
| Perimeter edging | 51 lin ft | 16 ft + 8 ft doubled, plus 5% for corners |
The area is 16 ft × 8 ft, so the longest single run is 16 ft and the short side is 8 ft. Rake in strips along the long run rather than across it — you will do fewer, longer passes and the surface comes out more even. Perimeter edging is about 51 linear ft.
Bulk comes to about $107 for 2.37 yd³ against $798 in 50 lb bags — a large saving that gets bigger as the order grows. Bagged stone only makes sense when the quantity is tiny or the truck cannot reach the spot.
Costs assume $6 per 50 lb bag and $45 per cubic yard loose. Weight uses 1.4 US tons per cubic yard, though decorative and lighter stone runs nearer 1.25 and dense crushed rock up to 1.45. Delivery and minimum-order charges are local, so get a delivered price before you decide.
Laying gravel so it stays put
- Strip the topsoil. Gravel spread over grass or soft earth sinks within a season — the soil pumps up through it and the surface turns to mush.
- On soft ground lay a woven geotextile before any stone. It separates the stone from the soil so the two do not mix, and it does most of the work of keeping the surface firm.
- Build in lifts. Compact each ≤4 in layer with a plate compactor before the next, and water it lightly as you go so the fines bind.
- You are moving 3.32 tons — about 2.37 yd³. Work from the far end back toward the entrance so you are not walking on the finished surface.
- Edge it, or it will migrate into the lawn. Timber, steel strip or a shallow concrete curb all work; without an edge the stone spreads a little further every month.
- Weed fabric belongs under decorative beds, not under a driveway base: traffic tears it, and once it rucks it creates a soft spot right where you need the surface firmest.
Common questions
How much gravel for 16×8 ft at 6 inches deep?
About 2.37 cubic yards, or 3.32 tons. The area is 128 ft² and 6 in deep gives 64.0 ft³ of stone; dividing by 27 gives cubic yards and multiplying by 1.4 gives the tonnage. That is roughly 133 × 50 lb bags if you buy bagged.
How many tons are in a cubic yard of gravel?
Roughly 1.4 US tons. It ranges from about 1.25 tons for lightweight decorative stone to 1.45 for dense crushed rock, and wet stone weighs more than dry. This calculator uses 1.4, a safe middle figure. At this depth one cubic yard covers about 54 ft².
How many pickup loads is 3.32 tons of gravel?
About 5 trips allowing half a cubic yard per trip. Be careful here: a half-ton pickup is rated for about 1,000 lb, which is only 0.35 cubic yards, and a full load of stone is well over that. Check your payload sticker rather than filling the bed.
How deep should gravel be for a driveway?
Six inches of compacted crushed base for a driveway, placed in lifts and compacted between them, topped with two to three inches of decorative stone if you want a finished look. Paths need two to four inches. This page is worked at 6 in — 6 in is base-course depth for a driveway or parking area.
Other sizes
- How Much Gravel for 10×10 ft at 2 Inches Deep?
- How Much Gravel for 10×10 ft at 4 Inches Deep?
- How Much Gravel for 10×10 ft at 6 Inches Deep?
- How Much Gravel for 12×12 ft at 2 Inches Deep?
- How Much Gravel for 12×12 ft at 4 Inches Deep?
- How Much Gravel for 12×12 ft at 6 Inches Deep?
- How Much Gravel for 20×10 ft at 2 Inches Deep?
- How Much Gravel for 20×10 ft at 4 Inches Deep?
- How Much Gravel for 20×10 ft at 6 Inches Deep?
- How Much Gravel for 20×20 ft at 2 Inches Deep?