How Much Gravel for a 4x40 Walkway?
A 4 by 40 foot walkway is 160 square feet. How much gravel for a 4x40 walkway depends on depth: at 3 inches it is about 1.48 cubic yards or 2.1 tons. Suppliers usually sell by the ton, so the tonnage is the number to give them.
Volume and tonnage calculator →The math for a 4x40 walkway
- Area: 4 × 40 = 160 sq ft.
- Depth in feet: 3 ÷ 12 = 0.250 ft.
- Cubic feet: 160 × 0.250 = 40.0 cu ft.
- Cubic yards: ÷ 27 = 1.48 yd³.
- Tons: × 1.4 = 2.1 tons.
The volume and tonnage calculator does this for any size.
Gravel needed by depth
| Depth | Cubic yards | Tons (approx.) | Tons +10% |
|---|---|---|---|
| 2 in | 0.99 | 1.4 | 1.5 |
| 3 in | 1.48 | 2.1 | 2.3 |
| 4 in | 1.98 | 2.8 | 3.0 |
| 6 in | 2.96 | 4.1 | 4.6 |
About gravel
Plain gravel is a loose term. Yards use it for rounded bank or river stone as well as for crushed rock, so ask whether the load is washed, crushed or a mix before you lock in a tonnage. Ask your supplier for their own tons-per-yard figure, since stone source and moisture shift it.
Preparing the walkway
Dig the path a few inches below grade, compact the bottom, add fabric if needed and install edging on both sides so the material stays on the walk. Since the walkway carries foot traffic, a little extra depth is cheap insurance.
Ordering tips
- Round up. Compaction and uneven ground eat material. Adding about 10 percent is common.
- Delivery size. 2.3 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 walkway as firm ground allows.
Where gravel fits
Good uses:
- Rural driveways and lanes where low upfront cost matters
- Drainage areas and around downspouts
- Temporary access while a site is under construction
Less suited to:
- Steep slopes, where loose stone washes downhill
- Spots plowed often, since plows push gravel into the lawn
- Areas next to doors, because stone tracks inside
Quick reference numbers
- Per inch over 100 sq ft: about 0.43 tons of gravel (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.3 tons.
- Another size for comparison: a 15x30 area at 3 inches takes about 5.8 tons.
- Weight used here: about 1.4 tons per cubic yard.
Common estimating mistakes
- Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
- Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.
- Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.
- Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.
Questions people ask
How many tons of gravel for a 4x40 walkway?
About 2.1 tons at 3 inches deep, or 2.3 tons with 10 percent extra.
How many cubic yards is a 4x40 walkway at 3 inches?
About 1.48 cubic yards.
How much does a cubic yard of gravel weigh?
Usually around 1.3 to 1.5 tons, depending on stone size, fines and moisture.
How deep should gravel be for a walkway?
The table above shows 2 to 6 inches. Shallower depths suit top dressing; deeper depths suit new installs and heavier use.
How many square feet is 4x40?
160 square feet.
Related guides
- How Much Does a Ton of Gravel Cover? Depth Chart
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Many Tons of Gravel in a Dump Truck? Loads and Coverage
- How Much Gravel for a 4x25 Walkway?
- How Much Gravel for a 4x30 Walkway?
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