Most of the people has interest in gardening and making garden bed ,but they have no idea about the land required for these things from there whole land . Whether you are on a landscaping project, garden bed, or construction site, and want to knowing how much dirt you need is crucial. A Dirt Yardage Calculator helps you to estimate the volume of soil, topsoil, or fill dirt required in cubic yards—the standard measurement for bulk materials.
How Does a Dirt Yardage Calculator Work?
Working of Dirt Yardage Calculator is very simple . here we are see the process of working with formula. A dirt yardage calculator takes three simple measurements:
- Length (in feet)
- Width (in feet)
- Depth (in inches)
The feet unit are converts into cubic yards, the standard unit for ordering soil, mulch, or gravel.
Why Cubic Yards? There are many reason, why we are take the unit in cubic yard.
- We see in market the Suppliers sell dirt by the cubic yard (not by weight, as moisture content changes weight).
- Where 1 cubic yard = 27 cubic feet (3ft × 3ft × 3ft).
The Dirt Yardage Formula
The formula to calculate dirt volume is:
Cubic Yards
The formula to calculate dirt volume is:

Why 324?
First, convert depth from inches to feet :

Then, divide by 27 to convert cubic feet to cubic yards:

Combining these steps simplifies to:

Step-by-Step Calculation Examples
Example 1: Garden Bed
You want to add 6 inches of topsoil to a 10 ft × 15 ft garden.
Calculation: (10×15×6)/324 = 900/324 ≈ 2.78 cubic yards
Example 2: Lawn Leveling
You need to level a 20 ft × 30 ft yard with 3 inches of fill dirt.
Calculation:
= (20×30×3)/324=1800/324 ≈5.56 cubic yards
Example 3: French Drain
Digging a trench 2 ft wide × 15 ft long × 12 inches deep for gravel.
Calculation: (2×15×12)/324 =360/324 ≈ 1.11cubic yards
