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Whether you’re leveling out a sloped backyard, filling in an old swimming pool, or prepping a foundation for a new shed, fill dirt is the unsung hero of landscaping.

However, buying dirt isn’t as simple as grabbing a few bags from the hardware store. If you buy too little, you’ll pay extra for secondary delivery fees. If you buy too much, you’re left with a massive pile of earth that’s difficult to move and unsightly.

To get the job done right, you need to calculate your volume accurately. Here is a simple guide to figuring out how much fill dirt you need.

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The Basic Formula: How to Measure

Because dirt is sold by volume (typically in cubic yards), you need to calculate the volume of the space you want to fill.

The Formula:

(Length x Width x Depth) / 27 = Cubic Yards

Step-by-Step Breakdown:

1. Measure in feet: Measure the length, width, and depth (height) of the area in feet. If you measure in inches, divide by 12 to get the foot measurement.
   • Example: 10 feet long, 10 feet wide, and 1 foot deep.
2. Calculate Cubic Feet: Multiply Length x Width x Depth.
   • Example: 10 x 10 x 1 = 100 cubic feet.
3. Convert to Cubic Yards: Since dirt is sold by the cubic yard, divide your cubic feet total by 27 (because there are 27 cubic feet in one cubic yard).
   • Example: 100 / 27 = 3.7 cubic yards.

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Don’t Forget the “Compaction Factor”

This is the mistake most DIYers make. When fill dirt sits in a dump truck, it is “fluffed up” and aerated. Once you dump it into your yard and start walking on it, driving over it, or tamping it down, the air pockets collapse, and the dirt settles.

The Rule of Thumb: Increase your total by 15–20% to account for compaction and settling.

• Using the example above (3.7 cubic yards):
  • 3.7 x 1.20 (20% extra) = 4.44 cubic yards.

• Order 4.5 or 5 cubic yards to ensure you don’t run short.

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Tips for Ordering Your Dirt

• Check the Type: “Fill dirt” is subsoil—it contains clay, rocks, and sand. It is not topsoil. Don’t use fill dirt to grow a garden; use it only for raising grades or filling large gaps. If you plan to plant grass on top, make sure you save 4–6 inches at the top for high-quality topsoil.
• Ask about Delivery: Most companies deliver by the “dump truck load.” A standard single-axle dump truck usually holds between 5 and 10 cubic yards. If you need less than a full truckload, expect to pay a “short load” fee.
• Access Matters: Before ordering, ensure the delivery driver has enough space to back the truck in and dump the load without hitting overhead power lines or low-hanging tree branches.

The Bottom Line

Calculating your fill dirt doesn’t require a degree in engineering, just a tape measure and a little bit of math. By accounting for https://everycalculators.com/ and adding that crucial 20% buffer for compaction, you’ll save yourself time, money, and a massive headache on delivery day.

Ready to start digging? Grab your tape measure and get calculating!