Soil Calculator
Estimate cubic yards of soil for garden beds, lawn repair and landscape fill.
Project details
Estimate
Planning estimate only. Verify product dimensions, manufacturer coverage, local requirements and field conditions before purchasing.
How soil volume is calculated
Multiply length, width and depth to get cubic feet, then divide by 27 to convert to cubic yards.
Settling and compaction can change the final quantity needed.
Soil planning guide
Soil volume is driven by the area being filled and the finished depth, but delivered soil can settle or compact after placement. Break irregular beds into simple shapes, measure depth realistically and ask the supplier how the chosen topsoil or fill is sold so the cubic-yard estimate matches local delivery increments.
Turning the estimate into an order
Calculate the base requirement first, then convert it into cubic yards or whole bags. Before ordering, verify area, settled depth and the supplier’s selling unit. Round only at the final purchasing step so intermediate rounding does not quietly inflate the estimate.
What changes the field quantity
Loose soil settles after spreading, and screened topsoil, compost blends and garden mixes have different densities. Existing grade may also require varying depth across the site.
Handling a non-rectangular project
Divide beds or grading areas into zones with similar target depth. Calculate deep low spots separately from thin top-dressing areas rather than applying one average depth to the whole site.
Mistakes worth checking
- Using inches as feet for depth
- Assuming the same depth is needed everywhere on an uneven grade
- Converting yards to bags without checking bag volume
- Ignoring settlement when a finished elevation matters
Soil Calculator FAQ
Can I use this for raised beds?
Yes, if the bed can be approximated as a rectangular volume.
Should I account for settling?
Yes. Freshly placed soil can settle, so a small allowance may be appropriate.
Can I use this for compost?
Yes. The same volume calculation works for compost and similar bulk landscape materials.
Soil ordering notes
For bulk delivery, order by cubic yard and ask the supplier about minimum loads and typical settlement. For bagged products, convert using the exact bag volume. Compost-rich mixes may be selected by purpose rather than by density alone.
Use the calculator result as a planning quantity, then compare it with the packaging, minimum order, delivery rules and technical data for the exact soil you intend to use. Where drawings, codes or manufacturer instructions conflict with a general estimate, follow the project-specific requirement.
Before placing the order
- Recheck the final measured dimensions after the project scope is fixed.
- Confirm area, settled depth and the supplier’s selling unit.
- Convert the calculated requirement into the supplier’s actual selling units and round up only where whole units are required.
- Keep labor, delivery, tax, equipment and site-specific requirements separate unless the calculator explicitly includes them.
How to use this soil estimate in a real project
Estimate soil or topsoil volume for beds and grade changes from area and average depth, then convert to bags or bulk yards.
Worked planning check: 300 ft² bed with 4 in added soil
300 × (4/12) = 100 ft³ = 3.70 yd³ before allowance for settlement or irregular grade.
What to verify before you buy
- Measure the project after the layout is fixed, not from an early sketch.
- Replace every default value with the specification, package coverage or local quote for the exact material you will use.
- Round to whole bags, boards, sheets, bundles or cartons only at the final purchasing step.
- Keep delivery, tax, labor, equipment, permits and structural/code requirements separate unless a calculator field explicitly includes them.
Reference sources and cross-checks
- Calculator.net Concrete Calculator — Benchmark example of pairing a calculator with shape-specific explanations and educational context.
- Omni Calculator — Construction — Benchmark example of organizing many construction tools into clearly explained topic clusters.
BuildCalc Guide is an independent planning tool. External references are used to check terminology, typical estimating methods and manufacturer-specific cautions; they do not sponsor or endorse this site. Product labels, project documents and locally adopted codes take priority.