Soil for a 4x4 Raised Bed 12 Inches Deep
A raised bed 4 by 4 feet and 12 inches tall holds 16.0 cubic feet. How much soil for a 4x4 raised bed 12 inches deep in bags: 8 two-cubic-foot bags. In bulk: about 0.59 cubic yards.
Volume and tonnage calculator →The math
- Volume: 4 × 4 × (12 ÷ 12) = 16.0 cu ft.
- Cubic yards: 16.0 ÷ 27 = 0.59 yd³.
- Bags: 16.0 ÷ 2 = 8 bags (2 cu ft), or ÷ 1.5 = 11 bags (1.5 cu ft).
The topsoil calculator handles any bed size.
Related: Soil for a 4x4 Raised Bed 18 Inches Deep
Soil for a 4x4 bed at other depths
| Depth | Cubic feet | Cubic yards | 2 cu ft bags |
|---|---|---|---|
| 6 in | 8.0 | 0.30 | 4 |
| 8 in | 10.7 | 0.40 | 6 |
| 10 in | 13.3 | 0.49 | 7 |
| 12 in | 16.0 | 0.59 | 8 |
| 18 in | 24.0 | 0.89 | 12 |
| 24 in | 32.0 | 1.19 | 16 |
When bulk soil pays off
For a single bed this size, bagged mix keeps things tidy. Many yards sell a blended raised-bed mix of topsoil and compost by the yard.
Related: Soil for a 4x10 Raised Bed 12 Inches Deep
A good raised bed mix
Many gardeners blend topsoil with compost, around 50 to 60 percent topsoil. The compost adds nutrients and keeps the mix loose. Bagged potting soil alone is light and can dry out fast in a deep bed.
Settling
New soil settles, often by 10 to 20 percent in the first season. Overfill slightly or plan to top up with compost next spring. Line the bottom with cardboard to smother grass instead of digging it out.
Weight and hauling
Soil is heavy and mulch is bulky. A half-ton pickup can usually carry only a fraction of a yard of soil safely, even if it looks like more would fit. Delivery is often the safer and faster option.
Checking quality
Squeeze a handful: quality topsoil holds together loosely and breaks apart, rather than forming a sticky ball of clay or falling apart like sand. Avoid soil that smells sour or contains debris.
Questions people ask
How many bags of soil for a 4x4 raised bed?
About 8 bags of 2 cubic feet at 12 inches deep.
How many cubic feet in a 4x4x12 inch bed?
16.0 cubic feet.
How many yards of soil for a 4x4 raised bed?
About 0.59 cubic yards at 12 inches deep.
What soil mix is best for raised beds?
Topsoil blended with compost, roughly 60/40, is a common starting point.
Will raised bed soil settle?
Yes, often 10 to 20 percent in the first season.
Related guides
- How Much Does a Yard of Topsoil Cover?
- How Many Bags of Topsoil in a Yard? Size Chart
- Fill Dirt vs Topsoil: Differences, Uses and Tons to Order
- How Much Does a Yard of Dirt Weigh? Topsoil, Fill, Clay
- Soil for a 3x8 Raised Bed 18 Inches Deep
- Soil for a 4x4 Raised Bed 10 Inches Deep
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