Topsoil Calculator — Cubic Yards, Bags & Raised Beds
Convert lawn, garden-bed, or raised-bed dimensions into cubic yards, bag counts, settlement allowance, and cost.
Topsoil volume is bed or lawn area × added depth, converted to cubic yards or bags. Settlement, existing grade, drainage, soil blend, and whether the dimensions are inside or outside a raised bed affect the order.
51 bags at 1 cu ft each.
- Topsoil51 bags
Raised-bed mixes often include compost or other amendments; do not assume pure topsoil is the complete planting mix.
Step by step
- 1
Measure the fillable inside area and the added depth after accounting for existing soil or other layers.
- 2
Apply a settlement allowance appropriate to the soil blend and intended use.
- 3
Compare bulk delivery with the exact local bag volume, then confirm access and avoid overfilling against structures.
Check the estimate before you buy
Estimate topsoil for lawns, garden beds, and raised beds in cubic yards and common bag sizes.
A 12 × 4 ft raised bed filled 12 in deep holds 48 cubic feet, or 1.78 cubic yards before the selected settlement allowance.
How the calculation works
Length × width × depth produces cubic feet. The tool converts to cubic yards, adds the selected allowance, and rounds bag purchasing up.
Topsoil Calculator — Cubic Yards, Bags & Raised Beds FAQ
Should I buy exactly the calculated amount of topsoil?
Usually no. Cuts, spillage, breakage, uneven surfaces, batch matching, and package rounding can increase the order. Use the editable allowance and confirm the product label.
Why does the result round up?
Stores sell full bags, boxes, cans, rolls, panels, or pieces. The tool keeps the mathematical amount visible, then rounds the purchasing quantity up separately.
Is topsoil the same as raised-bed mix?
No. Raised-bed mixes commonly include compost and other components. Use an appropriate mix and treat the calculator as a volume tool.
How many bags are in one cubic yard?
Divide 27 cubic feet by the bag's cubic-foot volume, then round up. The calculator does this after allowance.
Reference: University of Minnesota Extension raised-bed guidance. Results are practical estimates; complete labels, package directions, product specifications, and qualified professional advice take priority.