How Much Crushed Stone for a 12x16 Greenhouse Floor?
A 12 by 16 foot greenhouse covers 192 square feet. At 3 inches of crushed stone, plan on 1.78 cubic yards, or about 2.5 tons, which answers how much crushed stone for a 12x16 greenhouse floor.
Volume and tonnage calculator →The math
- Area: 192.0 sq ft.
- Depth in feet: 3 ÷ 12 = 0.250 ft.
- Cubic yards: 192.0 × 0.250 ÷ 27 = 1.78 yd³.
- Tons: × about 1.4 tons per yard = 2.5 tons.
The crushed stone calculator does this for any size.
Related: How Much #57 Stone for a 12x16 Greenhouse Floor?
Crushed stone needed by depth
| Depth | Cubic yards | Tons of crushed stone | Tons +10% |
|---|---|---|---|
| 2 in | 1.19 | 1.7 | 1.8 |
| 3 in | 1.78 | 2.5 | 2.7 |
| 4 in | 2.37 | 3.3 | 3.7 |
| 6 in | 3.56 | 5.0 | 5.5 |
Stone for a greenhouse
A stone floor drains spilled water, holds some heat and is easy to rake clean. Many growers use about 3 inches of pea gravel or washed stone over fabric, with paver or concrete stepping paths if they roll carts.
Related: How Much Crushed Stone for a 12x16 Patio?
Before the stone goes in
Clear vegetation, rake the soil level and compact it. Lay fabric overlapped at the seams and set edging before spreading the stone.
Buying the stone
Small dump trucks commonly carry around 5 to 10 tons and tri-axles more, but loads vary by truck and state, so ask the yard what fits in one trip. Crushed stone has angular faces that lock together under a compactor, which is why it holds a pad shape. Ask your supplier for their own tons-per-yard number, since stone source and moisture change it.
Measuring the area
Measure length and width in feet at a few points and use the largest figures, since real sites are rarely square. For odd shapes, split the area into rectangles and circles, work out each one and add them together. Depth is the number most people underestimate: drive a stake, run a level string and measure down to the dug-out surface in several spots.
Tools for the job
A flat shovel, a steel rake, a wheelbarrow and a rented plate compactor cover most residential pads. A landscape rake or the back of a rake levels the top layer, and a long straightedge or a level string shows high and low spots before the final pass.
Questions people ask
How many tons of crushed stone for a 12x16 greenhouse floor?
About 2.5 tons at 3 inches deep.
How many yards of crushed stone for a 12x16 greenhouse floor?
About 1.78 cubic yards.
How many tons of crushed stone are in a cubic yard?
Roughly 1.4 tons for planning, but suppliers vary with stone size and moisture.
Do I need to compact it?
Yes for anything that carries weight. Compact in lifts of a few inches with a plate compactor.
Related guides
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- Compacting a Driveway Gravel Base in Lifts
- How Much Pea Gravel for a 12x16 Greenhouse Floor?
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