Topsoil Calculator

Estimate topsoil for a lawn, garden bed or surface layer. Enter your coverage area and planned depth to find cubic yards, cubic feet or cubic meters, then compare bags and material cost.

Calculate Your Topsoil Quantity

Enter the area and depth of the new soil layer. Results update automatically.

Enter only the layer you plan to add, not the depth of soil already present.

Adds your selected percentage to the geometric volume. No automatic settling or compaction factor is applied.

Bag quantity — optional

Use the labeled volume, not weight in pounds or kilograms. Leave blank for a bulk-only estimate.

Material cost — optional

Excludes delivery, tax, spreading and supplier minimums. Currency selection labels your price; it does not convert exchange rates.

Planning new turf over the prepared area? The Sod Calculator estimates rolls, pieces or pallets from your lawn area. Topsoil and sod quantities are calculated separately.

MEASURE THE LAYER YOU PLAN TO ADD

How to Use the Topsoil Calculator

Enter your coverage area and additional soil depth, then compare bulk volume, bag quantities and optional material cost.

  1. Choose your coverage area

    Select a rectangle or circle and enter its dimensions. If you have already measured the total area, choose the known-area option. Exclude paths, paving and other spaces that will not receive soil.

  2. Enter the additional soil depth

    Set the thickness of the new layer, not the depth of soil already present. Add an optional percentage allowance if required for your order. The calculator does not apply an automatic settling factor.

  3. Compare bulk soil and bags

    Review cubic yards, cubic feet and cubic meters. For bagged topsoil, enter the volume printed on the product label. The calculator rounds up to the number of whole bags needed.

  4. Add a price and review the estimate

    Choose a bulk volume price or price per bag and enter your supplier’s rate. Check the calculation steps, then copy the estimate to keep with your measurements and supplier quote.

Adding soil at different depths? Calculate each section separately and add the volumes. If purchasing the same bagged product for all sections, divide the combined volume by the bag volume before rounding up to whole bags.

COMPARE BULK AND BAGGED SOIL

Topsoil Calculation Examples

Follow two ways to plan a topsoil purchase: a bulk order priced by cubic yard and a metric estimate using liter bags. Depths, allowances, bag sizes and prices are illustrative.

BULK TOPSOIL

Estimate a new layer with an extra allowance

Add a 3-inch layer over a 24 × 12 ft area. Include a 10% purchasing allowance and calculate material cost from a cubic-yard price.

Coverage dimensions
24 × 12 ft
Additional soil depth
3 inches
Extra allowance
10%
Example bulk price
$45.00 USD / cu yd
  1. Find the area and convert depth

    24 × 12 = 288 sq ft
    3 ÷ 12 = 0.25 ft

  2. Calculate the volume before allowance

    288 × 0.25 = 72 cu ft

  3. Include the selected allowance

    72 × 1.10 = 79.2 cu ft
    79.2 ÷ 27 ≈ 2.93 cu yd

  4. Apply the price to the unrounded volume

    (79.2 ÷ 27) × $45.00 = $132.00 USD

ESTIMATED BULK QUANTITY AND MATERIAL COST 2.93 cu yd · $132.00 USD

Cost uses the unrounded volume. Supplier ordering increments, minimum quantities, delivery, tax and spreading are not included.

BAGGED TOPSOIL

Convert a metric layer into whole bags

Estimate a 4 cm layer over a 5 × 3 m area. Compare the required volume with bags containing 25 liters each.

Coverage dimensions
5 × 3 m
Additional soil depth
4 cm
Extra allowance
0%
Volume per bag
25 L
Example bag price
$4.00 USD
  1. Calculate area and convert depth

    5 × 3 = 15 m²
    4 ÷ 100 = 0.04 m

  2. Find the additional soil volume

    15 × 0.04 = 0.60 m³

  3. Convert to liters and calculate bags

    0.60 × 1,000 = 600 L
    600 ÷ 25 = 24 bags

  4. Calculate the bagged material cost

    24 × $4.00 = $96.00 USD

ESTIMATED BAG QUANTITY AND MATERIAL COST 24 bags · $96.00 USD

These example bags supply exactly 600 liters. When a calculation gives a fractional bag, round up to the next whole bag.

Check circular beds before calculating volume

For a circular planting area, the Circle Area Calculator can help you check its footprint. Subtract any inner area that will remain uncovered, then use the remaining area with your planned additional soil depth.

Check soil quality as well as quantity

A volume estimate does not assess the soil you are buying. Utah State University Extension’s topsoil quality guidelines explain factors such as texture, organic matter, pH and soluble salts to consider when evaluating a product.

Keep the depth separate from the allowance: These examples calculate the additional layer you enter. An allowance increases the purchasing estimate; it does not automatically predict settling or the final installed depth.

CHECK DEPTH, COVERAGE AND QUANTITY

Topsoil Coverage & Calculation Formulas

Compare coverage at different additional depths and check the volume needed for your soil layer. The tables assume uniform spreading without an extra allowance.

Calculate the additional soil volume

Cubic yards = area in sq ft × depth in inches ÷ 324

For metric measurements, multiply area in square meters by depth in centimeters and divide by 100 to get cubic meters.

Estimate whole bags

Bags = required volume ÷ volume per bag, rounded up

Include your selected allowance before dividing. Use the same volume unit for both quantities: one cubic meter equals 1,000 liters.

Imperial coverage

Coverage per cubic yard and volume for 100 sq ft. Volumes are rounded to two decimal places.
Added depth 1 cu yd covers For 100 sq ft
1 inch 324 sq ft 0.31 cu yd
2 inches 162 sq ft 0.62 cu yd
3 inches 108 sq ft 0.93 cu yd
4 inches 81 sq ft 1.23 cu yd
6 inches 54 sq ft 1.85 cu yd

Metric coverage

Coverage per cubic meter and volume for 10 m². No settling or compaction adjustment is included.
Added depth 1 m³ covers For 10 m²
1 cm 100 m² 0.10 m³
2 cm 50 m² 0.20 m³
4 cm 25 m² 0.40 m³
5 cm 20 m² 0.50 m³
10 cm 10 m² 1.00 m³

These depths illustrate coverage calculations. They are not recommended application depths for every lawn or planting bed.

Use additional depth, not existing soil depth

If a surface already has soil, calculate only the layer you intend to add. For example, adding 2 inches over existing ground uses a 2-inch input, regardless of how deep the existing soil extends.

Bag volume and bag weight are different

A weight label in pounds or kilograms does not directly tell you the volume available for coverage. Use the product’s stated cubic feet, liters or cubic meters. This calculator does not convert soil weight into volume.

Calculate uneven areas in separate sections

If the required depth varies substantially, divide the area into sections with suitable depth estimates and add their volumes. One uniform depth may not represent depressions or varying ground levels accurately.

Compare the final order with the calculated volume

The tool rounds bags up to whole units but does not round bulk volume to a supplier’s delivery increment. Confirm minimum orders and sale increments before comparing bulk and bagged prices.

Keep the allowance explicit: A 10% allowance multiplies the geometric volume by 1.10. It increases the estimated purchase quantity but does not predict how much the soil will settle or establish the final installed depth.

HELP WITH YOUR TOPSOIL ESTIMATE

Frequently Asked Questions

Find answers about topsoil coverage, additional depth, bag quantities and material cost.

How do I calculate how much topsoil I need?

Multiply the area receiving soil by the depth of the new layer, using compatible units. For square feet and inches, calculate area × additional depth ÷ 324 to get cubic yards.

The topsoil calculator converts your measurements and applies any allowance you select. It can also estimate whole bags when you enter the volume per bag.

How much area does a cubic yard of topsoil cover?

One cubic yard covers 324 sq ft at 1 inch, 162 sq ft at 2 inches, or 108 sq ft at 3 inches. Greater depth means less coverage for the same volume.

These values assume a uniform layer without settling, compaction or an extra allowance. The depths illustrate coverage and are not recommendations for every application.

Should I enter the existing soil depth?

Enter only the additional depth you plan to add. For example, if 4 inches of soil are already present and your plan calls for another 2 inches, use 2 inches in the calculator.

The tool does not assess whether the existing soil or your chosen final depth is suitable for the intended lawn or planting area.

How many bags of topsoil are in a cubic yard?

One cubic yard equals 27 cubic feet. It therefore takes 27 bags containing 1 cubic foot each, or 54 bags containing 0.5 cubic feet each, to supply one cubic yard.

For 2-cubic-foot bags, the calculation gives 13.5, so you would purchase 14 whole bags to supply at least one cubic yard. Always check the volume printed on the chosen product.

Can I enter a bag weight in pounds or kilograms?

No. The bag field requires a volume in cubic feet, liters or cubic meters. A weight label alone does not establish how much space the soil occupies.

This calculator does not convert topsoil weight into volume. If only weight is listed, ask the supplier for the product’s bag volume or coverage at a stated depth.

Does the estimate include settling or compaction?

No automatic settling or compaction factor is applied. The result is the geometric volume of the layer you enter, increased by your optional allowance.

An allowance does not predict the final installed depth. Confirm any required adjustment with your supplier or installer for the product and conditions of your project.

Can I estimate topsoil for uneven ground or several beds?

Combine the coverage areas when all sections need the same additional depth. For different depths, calculate each section separately and add the volumes. Avoid counting overlapping areas twice.

For uneven ground, divide the site into smaller sections with suitable depth estimates. The calculator does not survey ground levels or determine the grading needed to reach a target elevation.

How does the topsoil cost estimate work?

Bulk pricing multiplies the unrounded volume, including your allowance, by the selected unit price. Bag pricing multiplies the rounded whole-bag quantity by the price per bag.

Delivery, tax, spreading, minimum orders and bulk ordering increments are excluded. Currency selection labels your entered price; it does not apply an exchange rate.

PLAN YOUR SOIL PURCHASE

Find the Topsoil Quantity for Your New Layer

Enter your coverage area and additional depth to estimate bulk volume or whole bags. Add your supplier’s price to check material cost before ordering.

Calculate Topsoil Quantity