Planning a garden, lawn, flower bed, raised bed, landscaping project, or other outdoor improvement often starts with one important question: How much soil do I need?

Buying too little soil can leave your project unfinished, while ordering too much can increase costs and leave you with excess material. Our Yards of Soil Calculator provides a quick way to estimate the amount of soil required based on the length, width, and depth of your project area.

The calculator uses three simple measurements: length in feet, width in feet, and depth in inches. After entering these values, it calculates the estimated cubic yards of soil needed, cubic feet, total surface area, and approximate weight.

Whether you are preparing a garden bed, spreading topsoil over a lawn, filling a planting area, or planning a landscaping project, this tool can help you make a more informed estimate before ordering soil.

What Is a Yards of Soil Calculator?

A yards of soil calculator determines the volume of soil needed for a particular area.

Soil and landscaping materials are commonly sold by the cubic yard, rather than by square feet or individual bags. Because of this, you need to know the three-dimensional volume of your project before ordering material.

The basic measurements needed are:

• Length
• Width
• Depth

The calculator converts the depth from inches to feet and then determines the volume in cubic feet. Since one cubic yard contains 27 cubic feet, the cubic-foot result is divided by 27 to calculate the required cubic yards.

Why Calculate Soil in Cubic Yards?

Cubic yards are one of the most common units used when ordering bulk landscaping materials.

A supplier may ask how many cubic yards of:

• Topsoil
• Garden soil
• Compost
• Mulch
• Fill dirt
• Landscape material

you need.

For example, if your calculation shows that your project requires approximately 3.5 cubic yards, you can use that figure when requesting a delivery quote.

Knowing the volume beforehand makes it easier to compare prices and avoid significantly overestimating or underestimating your order.

How to Use the Yards of Soil Calculator

The calculator is designed to be simple. Follow these steps.

Step 1: Measure the Length

Measure the length of the area you want to cover and enter the measurement in feet.

For example:

20 feet

If your area is 20 feet long, enter 20.

Step 2: Measure the Width

Measure the width of the project area in feet.

For example:

10 feet

Step 3: Determine the Soil Depth

Decide how deep you want the soil layer to be and enter the depth in inches.

For example:

6 inches

Depth is especially important because doubling the depth doubles the amount of soil required.

Step 4: Click Calculate

After entering all three measurements, click Calculate.

The calculator will provide four results:

• Cubic yards needed
• Cubic feet
• Total area
• Estimated weight

Step 5: Review the Estimate

Use the cubic-yard figure when determining how much bulk soil to order.

The other results can help you understand the size and approximate weight of the material involved.

Soil Calculation Formula

The volume calculation is based on a straightforward formula.

First, convert the depth from inches to feet:

Depth in feet = Depth in inches ÷ 12

Next, calculate cubic feet:

Cubic feet = Length × Width × Depth in feet

Then convert cubic feet to cubic yards:

Cubic yards = Cubic feet ÷ 27

This works because:

1 cubic yard = 27 cubic feet

The calculator also determines the surface area:

Area = Length × Width

The estimated weight is based on an assumed value of approximately 2,000 pounds per cubic yard.

Therefore:

Estimated weight = Cubic yards × 2,000 pounds

The weight should be considered an approximation because actual soil weight varies significantly.

Example: How Much Soil for a 20 × 10 Foot Area?

Suppose you want to fill a garden area that measures:

• Length: 20 feet
• Width: 10 feet
• Depth: 6 inches

First convert 6 inches into feet:

6 ÷ 12 = 0.5 feet

Now calculate the volume:

20 × 10 × 0.5 = 100 cubic feet

Convert cubic feet to cubic yards:

100 ÷ 27 = 3.70 cubic yards

So the calculator would show approximately:

• Cubic yards: 3.70 yards³
• Cubic feet: 100.00 feet³
• Total area: 200 sq ft
• Estimated weight: approximately 7,407 pounds

The weight is only an estimate because different soil products have different densities.

Why Soil Depth Matters

Depth can have a major effect on the amount of soil required.

Consider a 20 × 10 foot area.

At 3 inches deep, the soil requirement is approximately half of what it would be at 6 inches.

At 12 inches deep, the requirement is approximately twice the amount needed at 6 inches.

This is why you should measure or estimate the desired depth carefully before ordering.

Common Soil Depths

Different projects often require different depths.

Lawn Topdressing

A relatively shallow layer may be used when adding topsoil to an existing lawn.

Garden Beds

Vegetable and flower beds may require a deeper layer depending on the existing soil and plants being grown.

Raised Beds

Raised beds can require significant quantities of soil because the entire growing area may need to be filled.

Planting Areas

Trees, shrubs, and other landscaping plants may require specific planting depths based on the plant and soil conditions.

There is no single depth that works for every project, so consider the requirements of your particular application.

How Many Cubic Feet Are in a Cubic Yard?

One cubic yard contains:

27 cubic feet

This is because a cubic yard is a cube measuring 3 feet on every side:

3 × 3 × 3 = 27 cubic feet

This conversion is essential when calculating soil volume.

For example:

• 27 cubic feet = 1 cubic yard
• 54 cubic feet = 2 cubic yards
• 81 cubic feet = 3 cubic yards
• 108 cubic feet = 4 cubic yards

How Many Square Feet Does One Cubic Yard Cover?

There is no single answer because coverage depends on the depth.

One cubic yard can cover different areas depending on how thickly it is spread.

For example, at a depth of 1 inch, one cubic yard covers approximately 324 square feet.

At 2 inches, it covers approximately 162 square feet.

At 3 inches, it covers approximately 108 square feet.

At 6 inches, it covers approximately 54 square feet.

This demonstrates why both area and depth are required when calculating soil volume.

How Much Soil Do You Need for a Garden?

The amount of soil required for a garden depends on its dimensions and desired depth.

For example, consider a garden measuring 12 feet by 8 feet with a depth of 6 inches.

The calculation would be:

12 × 8 × 0.5 = 48 cubic feet

Then:

48 ÷ 27 ≈ 1.78 cubic yards

Therefore, the theoretical requirement is approximately 1.78 cubic yards.

When purchasing bulk material, you may want to discuss the calculated quantity with your supplier and account for settling and project-specific requirements.

How Much Soil Do You Need for a Raised Bed?

Raised beds can be calculated using the same volume formula.

For a rectangular raised bed:

Length × Width × Depth = Cubic Feet

If the dimensions are measured in feet, convert the depth from inches to feet before calculating.

For example, a raised bed measuring 8 feet long, 4 feet wide, and 12 inches deep would require:

8 × 4 × 1 = 32 cubic feet

Then:

32 ÷ 27 ≈ 1.19 cubic yards

So the theoretical volume is about 1.19 cubic yards.

Estimating Soil Weight

The calculator estimates soil weight using 2,000 pounds per cubic yard.

This is a convenient general estimate, but actual soil can weigh considerably more or less depending on its composition and moisture content.

Factors affecting soil weight include:

• Moisture
• Organic matter
• Sand content
• Clay content
• Compost content
• Gravel or rocks
• Compaction
• Product composition

For this reason, do not assume that every cubic yard of soil weighs exactly 2,000 pounds.

If transportation or structural loading is important, ask the supplier for the actual product density.

Why You May Need Extra Soil

Your calculated volume represents the theoretical amount needed to fill the specified dimensions.

In practice, soil can settle after installation. Uneven ground can also affect how much material is required.

Other factors include:

• Uneven surfaces
• Soil settling
• Measurement inaccuracies
• Compaction
• Irregularly shaped areas
• Material loss during handling

For larger projects, it can be useful to discuss your calculated quantity with the soil supplier before placing the final order.

However, avoid automatically adding a large percentage without considering the project and material type.

Calculating Soil for Irregular Areas

The calculator works best for rectangular areas because it uses:

Length × Width × Depth

If your landscaping area has an irregular shape, divide it into smaller rectangular or simple sections.

For example, an L-shaped garden could be divided into two rectangles.

Calculate the soil required for each section separately, then add the results together.

This method can provide a better estimate than treating the entire irregular area as one large rectangle.

Soil Calculator for Landscaping Projects

A soil calculator can be useful for many landscaping applications.

You may use it when planning:

• New lawns
• Flower beds
• Vegetable gardens
• Raised garden beds
• Tree planting areas
• Shrub beds
• Landscape renovations
• Topsoil applications
• Lawn leveling
• General yard improvements

The same volume principles apply whenever you need to determine how much material is required to fill a three-dimensional space.

Tips for Getting an Accurate Soil Estimate

Measure Carefully

Use a tape measure to determine the length and width rather than estimating whenever possible.

Measure Multiple Locations

If the ground is uneven, measure depth at several points and use a reasonable average.

Use Consistent Units

The calculator expects length and width in feet and depth in inches.

Consider the Final Grade

Think about the desired finished soil level before determining depth.

Check With Your Supplier

Bulk soil products can vary considerably in density and composition, so ask the supplier about product specifications.

Frequently Asked Questions

1. What is a yards of soil calculator?

A yards of soil calculator estimates the cubic yards of soil required based on the length, width, and depth of a project area.

2. How do I calculate cubic yards of soil?

Multiply the length by the width and the depth in feet to find cubic feet. Then divide the cubic-foot result by 27.

3. How many cubic feet are in one cubic yard?

There are 27 cubic feet in one cubic yard.

4. Why is soil depth entered in inches?

Depth is commonly measured in inches for landscaping projects. The calculator converts the depth to feet before calculating volume.

5. How much soil do I need for a 10 × 10 area?

The amount depends on the depth. For example, at 6 inches deep, a 10 × 10 foot area requires approximately 1.85 cubic yards.

6. How much soil does one cubic yard cover?

Coverage depends on depth. At 1 inch deep, one cubic yard covers approximately 324 square feet. Increasing the depth reduces the coverage area.

7. How much does a cubic yard of soil weigh?

The calculator estimates approximately 2,000 pounds per cubic yard, but actual weight varies by soil type and moisture content.

8. Does wet soil weigh more than dry soil?

Yes. Water adds weight, so wet soil can be substantially heavier than dry soil.

9. Can I use this calculator for garden soil?

Yes. The calculator can estimate the volume required for garden beds, provided you know the area's length, width, and desired depth.

10. Can I calculate soil for a raised bed?

Yes. Enter the raised bed's length and width and use the desired soil depth in inches.

11. Can this calculator be used for mulch?

The same volume calculation can be used for mulch, compost, and other bulk landscaping materials. However, material weight will vary.

12. What if my yard is an irregular shape?

Divide the area into smaller rectangles or other simple sections, calculate each section separately, and add the volumes together.

13. Should I order exactly the amount calculated?

The calculated amount is a theoretical volume. Soil settling, uneven ground, and measurement differences can affect the actual quantity required.

14. Why is my supplier's soil weight different from the calculator?

The calculator uses a general estimate of 2,000 pounds per cubic yard. Actual weight varies according to moisture, density, composition, and the specific soil product.

15. What measurements do I need before using the calculator?

You need the length in feet, width in feet, and desired soil depth in inches. With these three measurements, you can estimate the required soil volume.

Final Thoughts

Knowing how much soil to buy is an important part of planning a successful landscaping or gardening project. Ordering too little can create delays, while ordering too much can result in unnecessary expense and leftover material.

Our Yards of Soil Calculator simplifies the process by converting your length, width, and depth measurements into cubic yards and cubic feet. It also provides the total surface area and an estimated material weight.

For the best results, measure your project carefully, use the correct depth, and remember that actual soil weight can vary depending on moisture and composition. For irregular spaces, divide the project into manageable sections and calculate each section separately.

With the right measurements and a reliable volume estimate, you can approach your next soil, garden, or landscaping project with a much clearer idea of how much material you'll need.