| Scenario | Shape | Dimensions | Depth | Waste | Order (yd³) | Loads (10 yd³) |
|---|---|---|---|---|---|---|
| Lawn leveling | Rectangle | 40 ft × 25 ft | 2 in | 10% | 3.25 | 1 |
| Vegetable bed | Rectangle | 18 ft × 6 ft | 4 in | 12% | 1.50 | 1 |
| Round planter zone | Circle | Diameter 10 ft | 3 in | 8% | 1.00 | 1 |
- Rectangle area: A = L × W
- Circle area: A = π × (D/2)²
- Triangle area: A = 0.5 × B × H
- Volume: V = A × Depth
- Unit conversion: 1 yd³ = 27 ft³ = 0.764554857984 m³
- Add-ons: Vadj = V × (1 + Waste% + Compaction%)
- Rounding: Vorder = ceil(Vadj/step) × step
- Select a shape that matches your garden area.
- Choose the plan unit and enter the required dimensions.
- Enter the depth and select its unit.
- Set waste and compaction allowances as needed.
- Pick a rounding step that matches supplier increments.
- Optionally enter truck capacity, bag volume, and price.
- Press Calculate. Download CSV or PDF from the result box.
1) Why cubic yards matter for garden ordering
Bulk topsoil is commonly sold by the cubic yard because it matches truck and loader capacities. One cubic yard equals 27 ft³ (about 0.7646 m³), which helps you compare bagged and bulk purchases. This calculator converts your dimensions and depth into a consistent ordering quantity.
2) Depth selection and coverage guidance
Small depth changes create large volume changes across a yard. As a quick reference, 1 yd³ spread at 1 inch depth covers about 324 ft². At 2 inches, coverage is roughly 162 ft², and at 3 inches it is about 108 ft². Use an average depth if the surface is uneven.
3) Waste and compaction allowances
Waste accounts for spillage, edge trimming, and reshaping. For hand spreading, 8–12% is typical. Compaction allowance covers settlement after watering and foot traffic; 0–10% is common for loose fills. For precise work, base the allowance on your site method and supplier notes.
4) Rounding and delivery logistics
Suppliers may deliver in quarter-yard or half-yard increments and may have minimum order quantities. This tool can round your adjusted volume up to a chosen step so you order enough material. Use the truck capacity field to estimate loads and reduce scheduling surprises on delivery day.
5) Weight checks for access and handling
Weight varies with moisture, organics, and density. The calculator provides an estimate so you can consider driveway limits, wheelbarrow effort, and equipment needs. If you have a laboratory or supplier bulk density, select custom density for a closer estimate, especially when planning access on soft ground or tight landscaping.
For best results, verify dimensions on site, keep units consistent, and document your assumptions. Save the CSV or PDF report with your material submittals, delivery tickets, or homeowner notes to support repeatable ordering on future projects.
1) How do I choose the right depth for topsoil?
For leveling, 1–2 inches often works. For new beds, 4–8 inches may be needed. Use an average depth from several measurements for uneven areas.
2) Why does the calculator add waste and compaction?
Spreading and grading cause losses, and soil settles after watering. Adding allowances helps prevent under-ordering, which can delay finishing and increase delivery costs.
3) Should I use rectangle, circle, triangle, or custom area?
Use the shape that best matches your plan view. For irregular lawns or beds, measure the area separately and use the custom area option for the cleanest input.
4) How accurate is the weight estimate?
It is an estimate. Moisture can change weight significantly. If you know the supplier’s bulk density, enter it as a custom density for more reliable planning.
5) How do I compare bulk topsoil to bags?
The tool converts cubic yards to cubic feet, then estimates bags using your selected bag volume. This helps compare costs when small quantities are needed.
6) Why does it round the order quantity upward?
Rounding up ensures you have enough material after waste and settling. Ordering slightly more is usually cheaper than paying for a second small delivery.
7) What if my garden area slopes or has dips?
Take multiple depth readings, average them, and consider increasing waste slightly. For major regrading, split the area into sections and calculate each section separately.