Soil & Topsoil Calculator
Estimate Soil Volume, Weight & Bags
Planning a raised vegetable bed, leveling your yard lawn, or topdressing garden soil? Estimating bulk topsoil is key to a healthy yard and avoiding extra delivery fees. Use our free calculator to estimate the exact soil volume in cubic yards, weight in tons, and the number of retail soil bags needed.
How to Calculate Topsoil Needed
Topsoil calculations depend on geometric volume. Find the area of your garden bed in square feet, multiply by depth in feet, and convert cubic feet into cubic yards or tons:
- Area calculation: `Length × Width = Area`. A 10x8 ft bed has an area of 80 sq ft.
- Volume in cubic yards: `(Area × (Depth in inches ÷ 12)) ÷ 27`. Adding a 10% waste buffer is standard to cover settling and compaction.
- Density / Weight: Standard loam or organic topsoil weighs approximately **2,000 to 2,200 pounds per cubic yard** (1 to 1.1 tons). Wet soil is much heavier. Our calculator assumes **1.1 tons per cubic yard** density.
Soil Bags vs Bulk Soil Delivery
If your project requires less than 2 cubic yards of soil, buying packaged bags at a local home center is usually easiest. If you need more than 2 or 3 yards, bulk soil delivery from a local soil yard or nursery is usually far cheaper, saving 30% to 50% compared to bagged options.
Soil Particle Classifications (USDA)
| Particle Type | Diameter Range | Water Drainage | Nutrient Retention |
|---|---|---|---|
| Sand (Coarse) | 0.05 mm – 2.0 mm | Very High (fast) | Low |
| Silt (Medium) | 0.002 mm – 0.05 mm | Moderate | Medium |
| Clay (Fine) | Under 0.002 mm | Very Low (slow) | High |
| Loam (Ideal blend) | Balanced Mix | Excellent | Very High |
Frequently Asked Questions
How much does a cubic yard of topsoil cost?
Bulk topsoil averages $15 to $35 per cubic yard at local nurseries. Delivery fees run $40 to $100 depending on distance. Organic compost and specialty potting soil blends cost $40 to $70 per yard.
How deep should topsoil be for a raised bed?
For most vegetables, flowers, and turf grass, a topsoil depth of 6 to 8 inches is ideal. Shallow root systems (like lettuce or strawberries) can thrive with 4 to 6 inches, while deep root systems (like tomatoes or carrots) require 12 to 18 inches.
- Soil Science Society of America (SSSA) - Soil texture and composition tables.
- USDA Soils Guide - Classification maps and soil conservation recommendations.