A volume estimate tells you how much to order. It cannot tell you whether a soil blend is suitable for your planting plan. Check both before paying for delivery.
Start with the product
Ask the supplier about soil origin, blend composition and available soil test information. University of Maryland Extension advises inspecting purchased topsoil and notes that bagged organic growing products do not necessarily contain mineral topsoil. The right blend depends on what and where you are growing.
Source: University of Maryland Extension: Soil to Fill Raised Beds. Its buying advice is a useful starting point; confirm local suitability with your extension service.
Measure the layer you will add
For 200 sq ft at 4 inches, volume is 66.667 cu ft before extra. With a 10% allowance, the order estimate is 73.333 cu ft, or about 2.716 cubic yards. In 1 cu ft bags, that means 74 bags. If a bulk supplier sells in half-yard increments, it becomes a 3 cubic yard purchase before any higher minimum.
Four inches is only the depth used in this example. It is not a universal recommendation for lawns, raised beds or planting over roots.
Check settling and access
Ask whether the volume is measured loose, what settling to expect, and whether the vehicle can reach your drop-off point. Adjust the calculator allowance for your project rather than assuming a single percentage fits every soil.
Before confirming delivery
- Confirm the soil blend and your required additional depth.
- Check whether bags are labeled by volume or weight.
- Ask about minimum quantities, sales increments and delivery charges.
- Arrange a suitable place for the material and verify the supplier’s access requirements.
General guidance: adapt tasks to your local climate, plants and soil. Confirm product specifications with your supplier.