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Fill Dirt Calculator

Calculate fill dirt volume, weight, and delivery costs

Fill Dirt Needed

13.33 yd³

Weight

18.00 tons

Truck Loads

2

Total Cost

$350

Units
$
$
Cubic Yards

13.33

Weight

18.00 tons

Truck Loads

2

Total Cost

$350

Volume Breakdown

Area600.0 sq ft
Fill Depth6 in
Base Volume11.11 yd³
Compaction (+20%)2.22 yd³
Total Needed13.33 yd³

Cost Breakdown

Material Cost$200
Delivery Cost$150
Material (13.3 yd³ @ $15/yd³)$200
Delivery (2 loads @ $75/load)$150
Total Cost$350

Example Calculations

1Backyard Grading (30 × 20 ft, 6 inches deep)

Inputs

Length30 ft
Width20 ft
Depth6 inches
Fill TypeClean Fill (100 lbs/ft³)
Compaction20%
Cost per Yd³$15
Delivery Fee$75

Result

Fill Dirt Needed13.33 yd³
Base Volume11.11 yd³
Weight15.00 tons
Truck Loads2
Total Cost$350

Volume = 30 × 20 × (6/12) = 300 cu ft = 11.11 yd³. With 20% compaction = 13.33 yd³. Weight = (300 × 1.2 × 100) / 2000 = 18.00 tons. 2 truckloads. Material $200 + delivery $150 = $350.

2Foundation Fill (15 × 15 ft, 12 inches deep)

Inputs

Length15 ft
Width15 ft
Depth12 inches
Fill TypeClay (110 lbs/ft³)
Compaction20%
Cost per Yd³$15
Delivery Fee$75

Result

Fill Dirt Needed10.00 yd³
Base Volume8.33 yd³
Weight14.85 tons
Truck Loads1
Total Cost$225

Volume = 15 × 15 × (12/12) = 225 cu ft = 8.33 yd³. With 20% compaction = 10.00 yd³. Weight = (225 × 1.2 × 110) / 2000 = 14.85 tons. 1 truckload. Material $150 + delivery $75 = $225.

Frequently Asked Questions

Q

How much fill dirt do I need?

Measure the area length, width, and fill depth. Volume = Length × Width × (Depth / 12) in cubic feet, then divide by 27 for cubic yards. Add 20% for compaction since fill dirt settles after placement.

  • Formula: L × W × (Depth in inches / 12) ÷ 27 = cubic yards
  • Always add 20% compaction factor—fill dirt compresses significantly when packed
  • Irregular shapes: break the area into rectangles and sum volumes
  • For slopes, use the average depth between high and low points
  • One cubic yard of fill dirt covers about 108 sq ft at 3" depth before compaction
Q

How much does a cubic yard of fill dirt weigh?

Fill dirt weighs 2,000-3,000 lbs per cubic yard depending on type. Clean fill averages 2,700 lbs/yd³, topsoil about 2,025 lbs/yd³, and clay about 2,970 lbs/yd³.

  • Wet fill dirt weighs 20–30% more than dry—factor this into truck load limits
  • A standard dump truck holds 10–12 yd³ by volume but is limited by weight (40,000 lbs)
  • Clay fills are heaviest—trucks may carry only 8–9 yd³ of wet clay per load
  • Know the truck weight limit before ordering to avoid extra delivery trips
Fill TypeDensity (lbs/ft³)Weight per yd³Primary Use
Topsoil75~2,025 lbsGardens, lawns, planting beds
Sandy Loam90~2,430 lbsGeneral landscaping, good drainage
Clean Fill100~2,700 lbsGrading, foundations, structural fill
Clay110~2,970 lbsDrainage barriers, dam construction
Q

What is the difference between clean fill and topsoil?

Clean fill is subsoil free of organic matter, debris, and contaminants, used for grading and filling. Topsoil is the nutrient-rich top layer used for gardens and lawns. Clean fill compacts better for structural support.

  • Never use topsoil as structural fill—organic matter decomposes and causes settling
  • Clean fill is often free or very cheap from local excavation sites (check Craigslist)
  • For yards, place clean fill underneath and top with 4–6" of topsoil for grass
  • Regulations vary by area—some jurisdictions require certified clean fill for permits
PropertyClean FillTopsoil
Organic matterNone—inert subsoil5–10% organic content
CompactionCompacts well, stableSettles unevenly, not structural
DrainageGood to moderateVariable, can retain water
Cost per yd³$10–$20$20–$50
Best useGrading, foundations, fillGardens, lawns, planting
Q

How many truck loads of fill dirt do I need?

A standard dump truck holds 10-12 cubic yards of fill dirt. Divide your total cubic yards (including compaction factor) by the truck capacity. For example, 25 cubic yards requires 3 truckloads at 10 yd³ per truck.

  • Delivery fees range from $50–$150 per load depending on distance
  • Multiple loads on the same day may qualify for a per-load discount
  • Ensure your property has truck access—dump trucks need 10–12 ft of clearance
  • Schedule deliveries near the fill site to minimize wheelbarrow distance
Truck TypeCapacity (yd³)Weight LimitBest For
Pickup truck1–1.5~2,000 lbsSmall garden projects
Single-axle dump5–6~13,000 lbsSmall to mid-size jobs
Tandem-axle dump10–12~26,000 lbsMost residential projects
Tri-axle dump14–18~40,000 lbsLarge excavation/grading
Q

Why do I need extra fill dirt for compaction?

Fill dirt compresses 15-25% when compacted with heavy equipment. Adding a compaction factor (typically 20%) ensures you order enough material to reach the desired final grade after settling.

  • Loose fill dirt is 15–25% air—compaction removes air voids for stability
  • Standard compaction factor: 20% (order 1.2 yd³ for every 1 yd³ of compacted fill)
  • Sandy soils compact 10–15%; clay soils compact 20–25%
  • Compact in 6–8" lifts (layers) with a plate compactor or roller for best results
  • Under-ordering fill dirt is costlier than over-ordering—extra delivery fees add up fast

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Last Updated: Mar 11, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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