Calculator For Soil Yardage – Calculator City

Cubic Yards Needed for a 100 sq ft Area
Depth (inches)	Cubic Yards (cu yd)
1	0.31
2	0.62
3	0.93
4	1.23
6	1.85
12	3.70

What is a Soil Yardage Calculator?

A calculator for soil yardage is a specialized tool designed for gardeners, landscapers, and homeowners to determine the precise volume of bulk materials needed for a project. Whether you’re filling a raised garden bed, top-dressing your lawn with compost, or creating a new flowerbed with fresh topsoil, this calculator eliminates guesswork. It converts your area’s dimensions (length, width, and depth) into the standard unit for bulk landscaping materials: the cubic yard. Using a soil yardage calculator ensures you don’t overspend by purchasing too much material or face delays by not having enough to finish the job.

Soil Yardage Formula and Explanation

The core calculation is straightforward volume measurement, but the key is converting your initial measurements into a final cubic yardage. This calculator for soil yardage handles all the conversions automatically.

The Formula:

1. Calculate Area: Area = Length × Width

2. Calculate Volume: Volume = Area × Depth (ensuring all units are the same, e.g., all in feet or all in meters).

3. Convert to Cubic Yards:

If using feet: Total Cubic Yards = (Volume in Cubic Feet) / 27
If using meters: Total Cubic Yards = (Volume in Cubic Meters) × 1.30795

Formula Variables
Variable	Meaning	Unit (Auto-Inferred)	Typical Range
Length	The longest side of the rectangular area.	Feet or Meters	1 – 500
Width	The shorter side of the rectangular area.	Feet or Meters	1 – 500
Depth	The desired thickness of the material.	Inches or Centimeters	1 – 24
Cubic Yards	The final volume, the standard for purchasing bulk soil.	cu yd	0.1 – 1000+

Practical Examples

Example 1: Raised Garden Bed

You are building a raised garden bed and need to fill it with a quality soil mix.

Inputs: Length = 8 feet, Width = 4 feet, Depth = 10 inches
Units: Imperial
Calculation:
1. Area = 8 ft × 4 ft = 32 sq ft
2. Depth = 10 in / 12 = 0.833 ft
3. Volume = 32 sq ft × 0.833 ft = 26.67 cu ft
4. Cubic Yards = 26.67 cu ft / 27 = 0.99 cu yd
Result: You should order approximately 1 cubic yard of soil. For more complex projects, consider using a mulch calculator for specific material estimates.

Example 2: Top-dressing a Lawn with Compost

You want to spread a thin layer of compost over your lawn to improve soil health.

Inputs: Length = 20 meters, Width = 15 meters, Depth = 2 centimeters
Units: Metric
Calculation:
1. Area = 20 m × 15 m = 300 sq m
2. Depth = 2 cm / 100 = 0.02 m
3. Volume = 300 sq m × 0.02 m = 6 cu m
4. Cubic Yards = 6 cu m × 1.30795 = 7.85 cu yd
Result: You would need just under 8 cubic yards of compost. Our lawn seeding calculator can help plan the next steps.

How to Use This Soil Yardage Calculator

Select Your Unit System: Start by choosing between ‘Imperial (Feet / Inches)’ or ‘Metric (Meters / Centimeters)’. The input labels will update automatically.
Enter Area Dimensions: Input the length and width of your project area into the designated fields. For non-rectangular areas, break them down into smaller rectangles, calculate each one, and add the results together.
Enter Material Depth: Input how deep you want the soil, compost, or mulch to be. Note that for Imperial units, this is in inches, and for Metric, it’s in centimeters.
Interpret the Results: The calculator instantly displays the total cubic yards needed in the primary result box. It also shows intermediate calculations like total area and volume in the original units, which can be helpful for cross-referencing. The visual chart also provides a quick glance at how depth affects the total amount.

Key Factors That Affect Soil Calculations

Soil Compaction: Bulk soil is loose when delivered. It will settle and compact over time, often by 10-20%. It is wise to order about 10% more than the calculator suggests to account for this.
Irregular Shapes: This calculator is for rectangular areas. For circles, use the formula (π × radius² × depth). For complex shapes, divide the area into simple rectangles and squares and sum their volumes.
Slopes and Grades: A sloped area requires more soil than a flat one of the same surface dimensions. You may need to take multiple depth measurements and average them for a more accurate result.
Material Type: While a cubic yard is a standard volume, the weight and density of materials like soil, sand, and gravel differ. This calculator is for volume, which is how these materials are sold. A gravel calculator might be needed for heavy materials.
Project Purpose: A garden bed needs to be filled completely, but top-dressing a lawn requires a much thinner, more precise layer. Adjust your depth accordingly.
Measurement Accuracy: The old adage “measure twice, cut once” applies here. Inaccurate initial measurements are the most common source of error. Double-check your length, width, and desired depth.

Frequently Asked Questions (FAQ)

How much is a cubic yard of soil?: A cubic yard is a measure of volume, not weight. Imagine a cube that is 3 feet long, 3 feet wide, and 3 feet tall. That’s one cubic yard (3x3x3 = 27 cubic feet). The amount of soil in one of these is what you get.
Why is soil sold in cubic yards?: Cubic yards are the industry standard for bulk landscaping materials because it’s a consistent measure of volume, which is what matters when filling a space. Selling by weight would be inconsistent, as moisture content can dramatically change the weight of a load.
How do I calculate soil for a circular area?: Measure the radius of the circle (from the center to the edge). The formula for area is π × radius × radius. Multiply that area by your desired depth to get the volume. For example, for a 10ft diameter circle (5ft radius) with 6 inches of soil: (3.14 * 5 * 5) * 0.5ft = 39.25 cubic feet / 27 = 1.45 cubic yards.
Does this calculator work for mulch or gravel?: Yes. The volume calculation is the same regardless of the material. A cubic yard is a cubic yard, whether it’s filled with soil, mulch, or gravel. You can use our specific concrete calculator for building projects.
How many bags of soil are in one cubic yard?: This varies greatly by bag size. A common size for bagged topsoil is 0.75 cubic feet. In that case, you would need 36 bags to equal one cubic yard (27 / 0.75 = 36). Larger 2 cubic foot bags would require about 14 bags.
What if my depth is in feet instead of inches?: If you are using the Imperial setting, you can convert your depth to inches before entering it. Simply multiply your depth in feet by 12. For example, a 0.5-foot depth is 6 inches.
Should I buy extra soil?: Yes, it’s highly recommended. A good rule of thumb is to add 5-10% to your final calculated amount to account for settling, compaction, and any slight measurement inaccuracies. It’s always better to have a little extra than to run out mid-project.
What’s the difference between a “yard” and a “cubic yard” of soil?: In the context of landscaping and ordering bulk materials like soil, the terms are used interchangeably. When a supplier says “a yard of topsoil,” they mean one cubic yard.

Related Tools and Internal Resources

Planning a larger project? These tools can help you get the right measurements for every part of your job.

Mulch Calculator: Estimate the amount of mulch needed to cover your garden beds and protect your plants.
Gravel Calculator: Perfect for calculating the volume and weight of gravel required for driveways, paths, or drainage projects.
Paver Calculator: Plan your patio or walkway by calculating the number of pavers you’ll need for your area.
Concrete Calculator: Determine how many bags of concrete are necessary for footings, slabs, or post holes.
Lawn Seeding Calculator: Find out how much grass seed you need to start a new lawn or overseed an existing one.
Fertilizer Calculator: Apply the correct amount of fertilizer for your lawn’s square footage.

Soil Yardage Calculator

Yardage Breakdown by Depth