Yards of Dirt Needed Calculator

Measure length, width, depth, waste, and compaction. Convert volume into clear yards for safer ordering. Plan soil deliveries with coverage, weight, and load details.

Calculator

Example Data Table

Project Size Depth Base cubic yards Suggested allowance
Small garden bed 12 ft × 4 ft 6 in 0.89 10% waste
Lawn low spot 20 ft × 15 ft 3 in 2.78 10% waste
Round planting area 10 ft diameter 4 in 0.97 10% waste
Utility trench backfill 60 ft × 2 ft 18 in 6.67 15% compaction

Formula Used

Rectangle or trench area: Area = length × width

Circle area: Area = π × radius²

Triangle area: Area = base × height ÷ 2

Volume in cubic feet: Volume = area in square feet × depth in feet × quantity

Cubic yards: Cubic yards = cubic feet ÷ 27

Order amount: Order yards = base yards × (1 + waste %) × (1 + compaction %)

Estimated weight: Weight = rounded order yards × density per cubic yard

How to Use This Calculator

  1. Select the area shape that matches your project.
  2. Enter the needed dimensions and choose the correct unit.
  3. Enter the depth. Use average depth for uneven ground.
  4. Add the number of matching areas when the same bed repeats.
  5. Enter waste, compaction, swell, density, and truck capacity.
  6. Press the calculate button.
  7. Review cubic yards, rounded order yards, weight, and truck loads.
  8. Download the CSV or PDF for your project notes.

Planning Dirt Orders With Better Measurements

Why Volume Matters

Yards of dirt are used for many outdoor jobs. They help level a lawn, fill a low spot, raise a garden bed, or backfill a trench. The hard part is not the math. The hard part is using the right depth and adding enough allowance. A shallow layer across a wide area can still need a large load. A deeper fill in a small bed can also grow fast.

How the Tool Works

This calculator starts with area. You can enter a rectangle, a circle, a triangle, a trench, or a known area. Then it changes the selected units into feet. Depth is handled the same way. When two depth values are used, the tool averages them. This helps with uneven ground, sloped beds, or low spots that are deeper at one end.

Allowances and Rounded Orders

After the base volume is found, the calculator applies quantity, waste, and compaction allowance. Waste covers spillage, trimming, grading loss, and small measuring errors. Compaction allowance is useful for fill dirt because loose soil settles when it is placed and packed. The final result is shown in cubic feet and cubic yards. A rounded order amount is also shown, so you can call a supplier with a practical number.

Weight and Delivery Notes

The weight estimate is optional. Dirt weight changes with moisture, soil type, and stone content. Dry screened topsoil can be lighter. Wet clay can be much heavier. The density field gives a planning estimate only. It should not replace limits from your truck, trailer, driveway, or delivery company.

Truck Loads and Site Checks

Use the truck load result to compare delivery options. A small dump trailer may hold only a few cubic yards. A larger truck may carry much more. Ordering a little more than the exact calculated amount is often better than stopping the job short. Still, very large waste factors can create disposal problems.

Best Measurement Practice

For best results, measure the project after rough grading. Use several depth checks. Remove inches from the depth if mulch, sod, gravel, or pavers will sit above the dirt. Keep drainage in mind. Dirt should not slope water toward buildings. Check local rules before filling near property lines, easements, utilities, or protected areas. Careful measurements make the order cleaner, cheaper, and safer. Simple records also make repeat orders easier next season.

FAQs

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

One cubic yard contains 27 cubic feet. That equals a cube measuring three feet long, three feet wide, and three feet tall.

2. Should I round dirt orders up?

Yes, rounding up is usually wise. Dirt can settle, spill, or grade unevenly. A small extra amount helps finish edges and low areas.

3. What depth should I use for topsoil?

Many lawn topdressing jobs use one to three inches. New beds may need six inches or more. Match depth to the project goal.

4. What is compaction allowance?

Compaction allowance adds extra dirt for settling and packing. Loose fill often becomes lower after watering, traffic, or mechanical tamping.

5. What is excavated swell?

Swell estimates how much soil expands after digging. Removed dirt usually becomes looser and takes more space than it did in the ground.

6. Can I use this for mulch or gravel?

The volume math works for many bulk materials. Change density and allowances as needed. Material behavior, weight, and compaction can differ.

7. Why is dirt weight only an estimate?

Moisture changes weight a lot. Wet clay can weigh much more than dry screened soil. Always confirm hauling limits before transport.

8. Can I calculate an uneven area?

Yes. Use average two depths. For complex sites, divide the space into smaller sections and add the separate results together.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.