A cubic yard, next to you
A cubic yard is a cube 3 feet on a side — 27 cubic feet, or about 202 gallons. On the ground it stands about waist-high on an adult, and it is the unit every bulk yard in the country sells soil, mulch and stone by. Here it is at true scale beside a 5′-9″ person:
The cube is deceptive. It looks manageable — until you remember that the same 27 cubic feet can weigh anywhere from a couple of bath tubs of water to two tons, and that every shovelful of it has to move twice: off the pile and into place. The three questions that follow — how far does it spread, how many trips is it, what does it weigh — are the whole practical math of a yard.
What a cubic yard covers, by depth
Coverage is 27 divided by the depth in feet. Slide the depth and watch the patch a single yard covers redraw to scale — the 4 × 8 sheet of plywood is your reference:
At this depth one cubic yard covers 108 ft² — a square about 10.39 ft on a side. The lever is steep: halve the depth and the patch doubles; a bed dug to a full foot swallows a yard in a 5 × 5 ft corner. This is why the honest first question at the yard is never “how many yards?” but “how deep are you spreading it?”
How many wheelbarrow loads is a cubic yard?
A yard rarely gets dumped where it belongs — it gets wheeled there. Pick your barrow and the material, and the trip math updates:
One cubic yard is 9 full loads — call it 9 trips — and each full load of this material weighs about 311 lb. That last number is the one that governs on real jobs: the math says a 6 ft³ contractor barrow moves a yard of gravel in 4½ loads, but a 620 lb barrow is a two-person argument, so crews run half-loads and double the trips. Budget the wheeling time, not just the material.
What a cubic yard weighs
The cube never changes size; the scale ticket swings by a factor of five. The same yard, by material:
A useful anchor: a cubic yard of water weighs about 1,685 lb (62.4 lb/ft³ × 27). Mulch floats far under that; every soil and stone lands well over it; and cured concrete, at 4,050 lb, is a fully loaded pallet rack in a 3-foot cube. Weight — not volume — is what decides whether a load is a wheelbarrow job, a pickup job, or a delivery.
Coverage and weight, tabulated
Table 1 is the coverage math at the common depths; Table 2 is the weight by material, in pounds and tons.
| Depth | Coverage |
|---|---|
| 1 in | 324 ft² |
| 2 in | 162 ft² |
| 3 in | 108 ft² |
| 4 in | 81 ft² |
| 6 in | 54 ft² |
| 12 in | 27 ft² |
| Material | lb | tons |
|---|---|---|
| Mulch | 800 | 0.4 |
| Compost | 1,000 | 0.5 |
| Topsoil | 2,000 | 1.0 |
| Fill dirt | 2,200 | 1.1 |
| Sand (dry) | 2,700 | 1.35 |
| Crushed stone / gravel | 2,800 | 1.4 |
| Concrete | 4,050 | 2.03 |
Worked example: a 10 × 12 ft garden bed
Say you’re topping a 10 × 12 ft bed with 3 inches of compost — the classic “how many yards do I need?” job, worked line by line:
volume = 120 × (3 ÷ 12) = 30 ft³ ÷ 27 = 1.11 yd³
or by coverage: 120 ÷ 108 ft²-per-yard = 1.11 yd³
supplier rounds to the ¼ yard → order 1.25 yd³
Both routes land on the same 1.11 yards, because they are the same math worn two ways. The quarter-yard rounding at the end is how bulk yards actually sell — the cubic yard calculator does the whole chain, including the weight of what you just ordered, and the material pages turn it into bags and tons.
Three things a cubic yard is not
- It is not a ton. A yard is volume; a ton is weight. Gravel runs ~1.4 tons per yard, mulch 0.4 — the converter translates by material.
- It is not a “scoop.” Loader buckets vary by yard — many run ½ to 1 yd³, but the only honest move is to ask what their bucket holds before you count scoops.
- It is not a pickup load. The bed might hold 2 yards of gravel by space; the payload sticker says otherwise by about 4×. Run the truck bed calculator first.
Cubic yard FAQ
How big is a cubic yard?
A cubic yard is a cube 3 feet on each side — 3 × 3 × 3 ft, or 27 cubic feet, which is about 202 gallons. It stands roughly waist-high on an adult and fills about nine 3 ft³ wheelbarrow loads. It is the standard unit bulk landscape material is sold by in the US.
How many square feet does a cubic yard cover?
Divide 27 by the depth in feet: a cubic yard covers 324 ft² at 1 in deep, 108 ft² at 3 in, 81 ft² at 4 in, and 54 ft² at 6 in. Spread thinner it goes surprisingly far; dug deep it disappears fast — at a full 12 in it covers just 27 ft², a 5 × 5 ft patch and change.
How many wheelbarrow loads are in a cubic yard?
A 3 ft³ homeowner wheelbarrow takes 9 heaped loads to move a cubic yard; a 4 ft³ barrow about 7 loads; a big 6 ft³ contractor barrow 4½ loads. The load weight is the real limit: a 6 ft³ barrow of gravel is over 600 lb, which is why crews run smaller loads than the math allows.
How much does a cubic yard weigh?
It depends entirely on the material: mulch is about 800 lb per cubic yard, compost 1,000, topsoil 2,000, sand 2,700, crushed stone 2,800, and cured concrete 4,050 lb. For reference, a cubic yard of water weighs about 1,685 lb — so soil and stone are heavier than water, mulch far lighter.
How many bags equal a cubic yard?
By bag size: 13.5 of the 2 ft³ mulch bags, about 36 of the 40 lb topsoil bags, or 45 of the 80 lb concrete bags make one cubic yard. Past a half yard or so, bagged material costs more and hauls harder than bulk — that crossover is why yards sell by the scoop and the ton.
Will a cubic yard fit in a pickup truck?
By volume, easily — a full-size bed holds about 2.1 cubic yards level full. By weight, usually not for stone: a typical 1,500 lb half-ton payload carries only about 0.54 yd³ of gravel, a 5 in layer in the bed. Check the truck bed calculator before you promise the yard you can haul it.
Is a cubic yard the same as a ton?
No — a yard is volume, a ton is weight, and the material connects them. Crushed stone runs about 1.4 tons per cubic yard, so one ton of gravel is only about 0.71 yd³. Suppliers quote either unit; the cubic yards to tons converter translates both ways by material.
Sources and standards
The geometry is exact; the densities are the site-wide estimating figures:
- Exact conversions: 27 ft³ per cubic yard; 7.48 gallons per ft³ (≈ 202 gal/yd³); 62.4 lb/ft³ for water.
- Densities: the same loose lb/yd³ figures used by each material’s calculator — mulch 800 through concrete 4,050.
- Wheelbarrow sizes: the common sold tray sizes, 3–6 ft³ — check yours, they’re stamped or listed.
- Supplier practice: bulk yards batch in ¼-yd³ increments and weigh what matters — the scale ticket governs.