Soil Weight Calculator
Enter dimensions and density to calculate soil weight.
Soil Weight Formula
Understanding Soil Weight
Soil Weight by Type and Moisture
Soil is far more variable in weight than manufactured materials like gravel or concrete. The weight of a cubic yard of soil depends on three factors: mineral composition (clay is denser than loam), organic matter content (reduces weight), and moisture level (can change weight by 20–30%). Unlike stone products that have predictable densities, soil requires you to account for the specific type being delivered.
| Soil Type | Dry (tons/yd³) | Moist (tons/yd³) | Saturated (tons/yd³) |
|---|---|---|---|
| Topsoil (screened) | 1.00 | 1.10 | 1.30 |
| Garden Soil (amended) | 0.90 | 1.05 | 1.25 |
| Clay Soil | 1.20 | 1.40 | 1.70 |
| Sandy Soil | 1.10 | 1.25 | 1.45 |
| Loam (balanced mix) | 1.05 | 1.15 | 1.35 |
| Compost-Rich Blend | 0.70 | 0.85 | 1.10 |
| Potting Mix | 0.35 | 0.50 | 0.75 |
Potting mix (peat, perlite, vermiculite) is dramatically lighter than natural soil because it is engineered for aeration and drainage, not structural support. One cubic yard of potting mix weighs about one-third of natural topsoil.
Why Soil Weight Matters for Raised Beds and Containers
Elevated planters, rooftop gardens, and balcony containers must support the full saturated weight of their soil — not just the dry weight. A 4 × 8 foot raised bed filled 12 inches deep contains about 1.2 cubic yards of soil. Dry topsoil in that bed weighs roughly 2,400 lbs. After a heavy rain, the same soil saturated with water can weigh 3,100+ lbs. Structural supports, deck framing, and rooftop membranes must be engineered for the wet weight, not the dry weight.
Compaction and Settling
Loose soil placed in a new garden bed or fill area will settle 10–20% over the first year as rain compacts it and organic matter decomposes. Clay soils settle more (15–20%) than sandy soils (8–12%). Always order extra to account for this — a 12-inch deep bed should be filled to 14 inches initially, expecting it to settle to the target depth.
Compacted soil (for construction sub-grade) weighs 10–15% more per cubic yard than loose soil because the air voids are mechanically squeezed out. When estimating fill dirt quantities for grading, measure the void to fill in compacted volume, then add 15–25% to account for the compaction ratio.
Excavation and Disposal Weight
Soil removed during excavation weighs more than the volume of the hole suggests because digging loosens the soil, causing it to "bulk up" by 20–40%. A 10-cubic-yard excavation might produce 12–14 cubic yards of loose soil that needs to be hauled away. When ordering dumpsters or dump truck loads for soil disposal, calculate the bulked volume rather than the in-place volume.
Clay soil excavation is particularly challenging because clay is the heaviest common soil type and it bulks the most (30–40%). A 10-cubic-yard clay excavation can produce 14 cubic yards weighing 19+ tons — enough to fill and overweight two tandem dump trucks.
Soil Weight for Erosion Control
On slopes, the weight of the soil creates a downhill force proportional to the slope angle and the soil mass. Engineers calculate this force to design retaining walls, terraces, and erosion control blankets. Heavier clay soils exert more lateral pressure than light loamy soils on the same slope, requiring more robust retention structures.
Soil Weight FAQ
A cubic yard of dry topsoil weighs about 2,000 pounds (1 ton). Moist topsoil — the typical condition at a landscape supply yard — weighs 2,200 lbs (1.1 tons). Clay soil is heavier at 2,400–2,800 lbs per cubic yard. Compost-rich garden blends are lighter at 1,400–1,700 lbs. The wide range reflects the enormous variability in soil composition and moisture content.
Yes. Moisture adds 20–30% to the weight of topsoil. A cubic yard that weighs 2,000 lbs dry can weigh 2,600 lbs when saturated. Clay soils absorb and retain more water than sandy soils, so clay has an even larger wet/dry swing (up to 40%). After extended rain, allow soil to drain for 24–48 hours before hauling to reduce weight and prevent damage to lawns during delivery.
Fill dirt is typically heavier than topsoil because it has less organic matter and more mineral content. Dry fill dirt weighs about 2,200–2,400 lbs per cubic yard (1.1–1.2 tons), compared to 2,000 lbs for topsoil. Clay-heavy fill dirt can exceed 2,800 lbs per cubic yard. Fill dirt is used for grading and structural fill where weight and compaction are advantages, not drawbacks.
Dry topsoil weighs about 74 lbs per cubic foot. Moist topsoil is 81 lbs/cf. Clay soil ranges from 89–104 lbs/cf. Compost-rich blends weigh 52–63 lbs/cf. Potting mix is the lightest at 13–19 lbs/cf. These per-cubic-foot values are useful when filling containers, window boxes, and small raised beds where you measure in cubic feet rather than cubic yards.
A full-size pickup bed holds about 1 cubic yard, but moist topsoil at 2,200 lbs often exceeds half-ton truck payload limits (1,000–1,500 lbs). A safe load for a half-ton truck is about 0.5–0.7 cubic yards of moist topsoil. Three-quarter-ton trucks can handle a full cubic yard. For larger quantities, bulk delivery by dump truck ($50–$150 per load) is safer and more cost-effective.