Measure your garden area with flexible shapes and units. Add depth, waste, and compaction for accuracy. Get clear volume outputs for easy ordering.
| Scenario | Shape | Dimensions | Depth | Waste | Compaction | Adjusted Volume |
|---|---|---|---|---|---|---|
| Lawn topdressing | Rectangle | 12 m × 8 m | 2 cm | 8% | 10% | ≈ 2.28 m³ |
| Round tree bed | Circle | Radius 1.5 m | 8 cm | 10% | 10% | ≈ 0.62 m³ |
| Triangular corner fill | Triangle | Base 10 ft, Height 6 ft | 4 in | 12% | 15% | ≈ 1.05 yd³ |
Start by defining the exact area that will receive topsoil, not the whole yard. Measure straight edges with a tape, and use a string line to trace curves. Split irregular spaces into simple shapes and calculate each section separately, then sum the areas before choosing a depth. For long runs, record measurements so you can review them later. Mark corners with stakes to prevent boundary drift.
Topsoil depth depends on your goal and existing grade. Thin layers can smooth low spots and improve seed contact, while deeper layers rebuild raised beds and new lawns. Keep finished levels below edging, paving, and tree flare, and plan a gentle slope away from structures. If you are covering compacted ground, loosen it first so new soil bonds well.
Fresh topsoil rarely spreads perfectly on real sites. A waste allowance covers spillage, wheelbarrow losses, and trimming along borders. Compaction accounts for settling after watering, walking, and rainfall. Using both factors reduces the risk of ordering short and reworking the job. Where traffic is heavy, increase compaction slightly for safer planning.
Volume is area multiplied by depth, then converted into purchasing units. Bulk suppliers quote cubic yards or cubic meters, while retail bags are sold by liters or cubic feet. Comparing outputs helps you choose between bulk delivery, pickup loads, or bags for tight access. Bag estimates are helpful for narrow gates and phased work. Always match the supplier unit to the selected output before ordering.
When weight limits matter, estimate mass using bulk density, which varies with moisture and texture. Heavier soil may require more trips, stronger wheelbarrows, or a different route. Pricing fields compare suppliers by unit rate plus delivery fees, supporting a realistic budget and schedule. Request screened topsoil for leveling, and consider compost blends for planting beds. Confirm dump location, protect hard surfaces, and spread soil soon after delivery.
For turf leveling, many gardeners use a thin layer that does not bury grass blades. Apply lightly, rake evenly, and repeat in sessions if more height correction is needed.
Waste covers spillage and trimming losses. Compaction covers settling after watering, foot traffic, and rainfall. Using both gives a more reliable order quantity, especially on uneven sites.
Break the area into rectangles, circles, and triangles, calculate each, then add the areas together. If you already have a measured area from a plan, use the custom area option.
Enable density when you need a weight estimate for access limits, rooftop loading, or transport planning. Use a realistic bulk density for your soil condition, because moisture can change weight significantly.
Bulk is usually efficient for larger volumes and open access. Bags help when gates are narrow, space is limited, or you want staged applications. Compare the calculator’s m³/yd³ output against bag estimates.
This tool targets topsoil volume. Compost and mulch can be estimated the same way, but their density, settling, and recommended depth may differ. Adjust waste, compaction, and density to match the material.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.