Moisture
Water adds mass, so the same soil can weigh more when it is wetter. Dry and field-moist measurements should not be treated as interchangeable.
Soil weight guide
How Much Does a Cubic Yard of Soil Weigh?
Understand why a cubic yard tells you how much space soil occupies—not how heavy the load will be—and how a known bulk density can be converted into a planning estimate.
Start with the unit
A cubic yard is volume, not weight
1 cu yd = 27 cu ft
A cubic yard describes the space occupied by a material. Two materials can fill the same 27-cubic-foot volume while having different weights because the amount of mass packed into that space is different.
That mass-per-volume relationship is called bulk density. The USDA NRCS defines soil bulk density as soil weight divided by soil volume. A supplier selling soil by the cubic yard is therefore stating volume; the listing alone does not tell you a universal number of pounds. USDA Natural Resources Conservation Service
Density conversion
Why soil weight can vary so much
Penn State's conversion table gives 1,685.564 pounds per cubic yard for each 1 g/cm³ of bulk density. Multiplying a known density by that factor provides the values below.
| Bulk density | Approx. pounds per cubic yard |
|---|---|
| 1 g/cm³ | 1,686 lb |
| 1.2 g/cm³ | 2,023 lb |
| 1.33 g/cm³ | 2,242 lb |
| 1.4 g/cm³ | 2,360 lb |
| 1.6 g/cm³ | 2,697 lb |
This is a density-conversion table, not a guaranteed retail-topsoil weight chart.
NRCS describes approximately 1.0–1.6 g/cm³ as a normal bulk-density range for agricultural soils. That scientific context demonstrates variability; it is not a promised weight range for delivered topsoil, compost, or a raised-bed mix. The conversion factor comes from Penn State Extension.
Material conditions
What makes one cubic yard heavier or lighter?
Soil composition and texture
Different proportions of mineral particles and organic material can produce different bulk densities even when the measured volume is the same.
Organic matter
An organic-rich blend can have a different density from mineral-heavy soil. A label such as topsoil, compost, or raised-bed mix is not a universal density value.
Compaction
Less pore space generally means more soil mass is packed into the same volume, so handling and measurement conditions matter.
NRCS Soil Survey materials distinguish air-dry, oven-dry, and field-moist bulk-density records and their measurement methods. This is why a density value should be used with its stated condition and method rather than treated as a product-wide constant. USDA Natural Resources Conservation Service
Worked example
A density-based example
Penn State demonstrates the conversion with a bulk density of 1.33 g/cm³. Applying the published factor gives:
1.33 × 1,685.564
≈ 2,241.8 lb per cu yd
≈ 1.12 short tons per cu yd
This is a unit-conversion example, not an average weight for every topsoil or soil mix.
Raised-bed example
From bed volume to a hypothetical weight
A 4 ft × 8 ft bed filled 12 inches deep has this calculated volume:
4 × 8 × (12 ÷ 12) = 32 cu ft
32 ÷ 27 = 1.185... cu yd
1.185... × 2,241.8 ≈ 2,657 lb
This uses a hypothetical 1.33 g/cm³ density. It is a mathematical example, not a prediction of what your actual raised-bed mix will weigh.
Planning beyond volume
Why soil weight matters
A reasonable weight estimate can help you recognize the scale of a delivery, plan how material will be moved around the yard, and identify projects where a trailer, pickup, or load-bearing structure needs closer review. It does not replace product-specific or vehicle-specific information.
- Delivery planning
- Moving soil around the yard
- Trailer or pickup payload review
- Structures where load matters
Do not use a generic soil-weight estimate to determine whether a vehicle can safely carry a load. Confirm the material weight with the supplier and check the vehicle's actual payload rating.
Use product-specific information
For hauling, ask your supplier for the actual material weight
If transport weight matters, supplier-specific information is more useful than a generic internet estimate. Moisture can change, soil mixes can differ, and separate stockpiles may not have the same condition. The supplier knows the actual product being loaded and may have a measured or documented weight for it.
Before collecting material in your own pickup or trailer, ask for the expected load weight and confirm it against the vehicle and trailer documentation that applies to your setup. Do not convert cubic yards into a safe hauling capacity using a generic soil figure alone.
Plan the volume first
Need to know how many cubic yards you need first?
Enter your raised-bed dimensions to calculate soil volume, whole bag counts, and buying quantities. The calculator does not predict the actual weight of a soil mix.
Reviewed references
Sources and methodology
Scientific definitions and conversion factors on this page are paraphrased from USDA NRCS and Penn State Extension materials. Display values are rounded for readability; calculations retain the 1,685.564 conversion factor. See the site's Methodology for the separate volume and buying-plan formulas.
USDA Natural Resources Conservation Service
Soil Health Glossary ↗USDA Natural Resources Conservation Service
National Cooperative Soil Survey Data Content Standard ↗Penn State Extension
Conversion Factors for English and SI (Metric) Units ↗
Sources reviewed August 24, 2026.