Rectangular and circular areas
Area = length × width, or π × (diameter ÷ 2)²
Multiple-area mode totals each rectangle multiplied by its quantity. Every area uses the same depth.
How it works
How to calculate how much topsoil you need.
We calculate the surface area, multiply by your chosen depth, then apply only the extra soil percentage you enter.
Topsoil volume
Geometric volume = measured area × depth
US results use cubic yards with cubic feet alongside them; metric results use cubic meters.
Extra soil
Order volume = geometric volume × (1 + allowance %)
The allowance starts at 0%. It is a user-selected planning buffer, not an automatic physical correction.
Bagged topsoil
Bags = round up(order volume ÷ actual volume per bag)
The calculator uses only the volume you copy from the package and never assumes a universal bag size.
Practical planning notes
Depth and soil use depend on the project.
Choosing a topsoil depth
Measure the depth you plan to add rather than relying on an automatic preset. Existing grade, project goals, and site conditions all affect that decision.
Lawns and topdressing
Shallow topdressing may use decimal inches. Enter only the layer you intend to spread and confirm that plan against the needs of the lawn.
Topsoil and raised beds
Rectangle mode can estimate a raised-bed fill volume. Use the intended fill depth, but choose the growing-medium composition separately from this quantity calculation.
Bagged vs bulk topsoil
Use the exact volume for a bulk quote. For bags, enter the volume printed on the product and compare the resulting whole-bag count with local delivery terms.
Before you order
What this topsoil estimate assumes
- Entered surfaces are regular rectangles or circles and do not overlap.
- Every area in one calculation uses the same uniform depth; calculate different depths separately.
- The depth is chosen by you and is used directly without an automatic recommendation.
- Extra soil is optional and starts at 0%; it is a user-selected planning allowance, not an automatic compaction or settling correction.
- Bag counts depend only on the actual package volume you enter. No universal bag format or net-weight conversion is assumed.
- Supplier increments, truckloads, local prices, soil type, composition, density, and weight are outside this estimate.
Use horticultural and product information
Appropriate depth and growing-medium composition depend on the project, while bag volumes vary by product. Confirm those choices before ordering.
Extension guidance informs the educational notes only; it does not create calculator presets. Manufacturer packaging remains the source for volume per bag.
Soil guidance
Topsoil questions
Frequently asked questions
How much topsoil do I need?
Multiply the measured area by the depth you plan to add, then include only the extra planning allowance you choose. This calculator performs the conversions and keeps geometric and order volumes separate.
How many cubic yards of topsoil do I need?
Measure the project area and multiply it by the intended depth. The calculator converts that geometric volume to cubic yards without rounding it to a supplier increment.
How deep should topsoil be?
There is no single depth for every lawn, garden, grading, or raised-bed project. Enter the depth required by your specific plan and consult appropriate horticultural guidance when deciding it.
How much topsoil do I need for a lawn?
Enter the lawn area and the layer you intend to add. Decimal inches can represent shallow topdressing, while deeper work should follow the needs of the lawn and site.
How much soil do I need for a raised bed?
Use rectangle mode with the inside length, width, and intended fill depth. The result estimates volume only; choose the appropriate growing-medium composition separately.
How many bags of topsoil make a cubic yard?
There is no universal bag count. One cubic yard is 27 cubic feet, so divide 27 by the actual cubic-foot volume printed on the bag and round up for a whole-bag purchase count.
Should I add extra topsoil for settling?
Only add an allowance when it fits your plan. The calculator starts at 0% and never applies an automatic settling or compaction factor; site conditions and supplier guidance should inform your choice.
Related calculators
Keep planning your project.
Use another Measivo calculator to estimate the next material on your list.