🚜 Dirt Calculator - Free 2026
Calculate the exact amount of dirt, fill dirt, or topsoil you need for any landscaping or construction project. Get instant results in cubic yards, tons, and truckloads with accurate cost estimates based on 2026 USA market prices. Our dirt calculator handles rectangular areas, slopes, raised beds, and excavation projects.
Key Dirt & Soil Facts 2026
Standard Weight
Average weight of moist fill dirt (1.1 tons per cubic yard for ordering)
Average Cost
Fill dirt price range (topsoil $12-$50/yd³, plus $50-$150 delivery)
Truck Capacity
Standard dump truck load (tri-axle trucks carry 15-18 cubic yards)
Compaction Factor
Settling allowance for structural fills (5-10% for raised beds and gardens)
Who Needs a Dirt Calculator?
Homeowners
Calculate dirt for raised garden beds, lawn leveling, landscaping projects, and filling low spots in yards. Estimate topsoil needs for new lawns and planting areas.
Landscapers
Estimate fill dirt and topsoil for grading, berms, landscape installations, and site preparation. Calculate material quantities for accurate client quotes.
Contractors
Determine fill dirt volumes for foundation backfill, site grading, excavation fill, and utility trenches. Plan dump truck deliveries and equipment needs.
Builders
Calculate dirt for lot grading, foundation prep, drainage slopes, and site development. Estimate costs for material and delivery in project budgets.
🧮 Calculate Dirt & Topsoil Now
How the Dirt Calculator Works
Select Project Type
Choose your area shape: rectangular, circular, triangular, sloped surface, raised bed, or enter a known volume. Each shape uses appropriate calculation formulas for accuracy.
Enter Dimensions
Input measurements in feet and inches. The calculator automatically converts all measurements and handles mixed units for easy data entry without manual conversions.
Set Options
Choose dirt type (fill dirt, topsoil, clay), compaction factor, and cost estimation preferences. Advanced options let you customize calculations for your specific project needs.
Get Results
Instantly see volume in cubic yards and cubic feet, weight in tons, truckloads needed, and detailed cost breakdown with material and delivery estimates for budget planning.
Understanding Dirt Calculations for Construction Projects
Calculating dirt quantities accurately is essential for landscaping, construction, and grading projects. Whether you need fill dirt for leveling a yard, topsoil for a garden, or material for foundation backfill, understanding volume calculations prevents costly ordering mistakes. Our material calculators help you determine exact quantities needed for any project.
The basic calculation multiplies length × width × depth to get cubic feet, then divides by 27 to convert to cubic yards (the standard ordering unit for bulk dirt). However, factors like compaction, settling, moisture content, and dirt type significantly affect how much material you actually need. Professional contractors typically order 10-20% extra to account for these variables.
Dirt Types and Their Uses
Fill dirt is subsoil excavated from below topsoil layers, containing minimal organic matter. It costs $8-$15 per cubic yard and works well for grading, leveling, filling holes, and foundation backfill. Fill dirt compacts well and provides stable support for structures, driveways, and hardscaping projects.
Topsoil is nutrient-rich surface soil ideal for planting, costing $12-$50 per cubic yard depending on quality. Standard topsoil contains 20-50% organic matter, while premium screened loam ($18-$60/yd³) has higher nutrient content and finer texture. Use topsoil for gardens, raised beds, lawns, and any planting area. Our topsoil calculator helps estimate quantities for specific planting projects.
| Dirt Type | Weight (lbs/yd³) | Cost Per Yard | Best Use |
|---|---|---|---|
| Fill Dirt | 2,000-2,200 | $8-$15 | Grading, leveling, foundation fill, structural projects |
| Topsoil | 2,200-2,400 | $12-$50 | Gardens, raised beds, lawns, planting areas |
| Clay Soil | 2,400-2,700 | $10-$20 | Pond liners, dam construction, compaction projects |
| Sandy Fill | 2,000-2,200 | $15-$30 | Drainage, pipe bedding, base material |
| Screened Loam | 2,200-2,300 | $18-$60 | Premium gardens, new lawns, high-quality planting |
Compaction and Settling Factors
Loose dirt compacts 10-25% after placement, depending on soil type and moisture content. Clay soil compacts less (10-15%) due to its dense structure, while sandy fill dirt can compact up to 25% in deep fills. For raised beds and gardens with minimal foot traffic, use 5-10% extra. Structural projects like driveway base or foundation backfill require 15-20% additional material to achieve proper compaction.
When calculating dirt for grading projects, account for both compaction and natural settling over time. A 100 cubic yard fill area may require 115-120 cubic yards of loose dirt to achieve the desired final grade after compaction. For projects requiring specific elevations or grades, consult with a site engineer to determine accurate compaction factors based on soil testing results.
Weight and Delivery Considerations
Dirt weight varies significantly with moisture content. Dry fill dirt weighs approximately 2,000 pounds per cubic yard (1 ton), while saturated topsoil can reach 2,700 pounds per cubic yard (1.35 tons). This weight difference affects delivery costs, truck capacity, and equipment requirements. Always confirm weight specifications with your supplier before ordering.
Standard dump trucks carry 10-14 cubic yards (11-15 tons), while tri-axle trucks hold 15-18 cubic yards. Small pickup trucks manage 2-3 cubic yards, and dump trailers handle 6-8 cubic yards. For residential projects under 10 cubic yards, consider multiple smaller loads to avoid heavy trucks damaging driveways or yards. Delivery fees range from $50-$150 depending on distance, typically included in orders of 10+ cubic yards.
💡 Pro Tip: Ordering Dirt Efficiently
Order dirt in bulk (10+ cubic yards) to get better pricing and included delivery. For small projects under 5 cubic yards, compare bulk delivery costs versus buying bagged topsoil ($3-$8 per bag at garden centers). Calculate total project volume including compaction allowance before ordering to avoid costly second deliveries or excess material disposal.
Project Planning and Cost Estimation
Budget dirt projects by calculating material cost (volume × price per yard) plus delivery fees and equipment rental if needed. A typical 20 cubic yard project costs $200-$400 for fill dirt plus $100-$150 delivery, totaling $300-$550. Topsoil projects cost more - 20 cubic yards runs $240-$1,000 plus delivery depending on quality. Equipment rental (skid steer, compactor) adds $150-$300 per day.
For large grading projects, consider hiring professionals for spreading and compaction. Labor costs $40-$80 per hour, with experienced operators moving 50-100 cubic yards per hour using appropriate equipment. DIY projects save money but require physical labor - plan one person-hour per cubic yard for spreading and compacting by hand. Use our gravel calculator if you need base material under dirt fills.
⚠️ Important Safety and Legal Considerations
Call 811 before any excavation or fill project to locate underground utilities. Verify local ordinances for fill permits - many municipalities require permits for fills over 12 inches deep or 10 cubic yards total. Ensure proper drainage to avoid water pooling or runoff onto neighboring properties. Never place dirt within 6 inches of home siding or within tree drip lines without consulting an arborist.
Moisture Content and Seasonal Factors
Dirt moisture affects both weight and workability. Dry dirt is lighter but creates dust during spreading. Moderately moist dirt (10-15% moisture) compacts best and is easiest to work with. Saturated dirt is heavy, difficult to spread, and won't compact properly until it dries. Order dirt during dry weather for easier placement and better compaction results.
Spring and fall are ideal seasons for dirt projects due to moderate temperatures and soil moisture levels. Summer heat dries dirt quickly, requiring watering for proper compaction. Winter projects face frozen ground challenges and limited contractor availability. Plan projects during favorable weather to reduce labor time and achieve better compaction results.
Real Dirt Calculation Examples
🏡 Example 1: Backyard Leveling
Dimensions: 40 ft × 30 ft × 6 inches deep
Volume: 1,200 sq ft × 0.5 ft = 600 cubic feet (22.2 cubic yards)
Dirt Type: Fill dirt with 10% compaction allowance
Total Needed: 24.4 cubic yards fill dirt (26.8 tons)
This requires 2 dump truck loads. With fill dirt at $12/yd³ and $100 delivery, total cost is approximately $393. Add topsoil layer (2-3 inches) if seeding grass. Allow 2-3 days for spreading and compaction. For foundation grading projects, use our concrete calculator to estimate footing materials.
🌿 Example 2: Raised Garden Beds
Dimensions: 4 beds, each 8 ft × 4 ft × 12 inches deep
Volume Each: 32 sq ft × 1 ft = 32 cubic feet (1.19 cubic yards per bed)
Soil Type: Premium topsoil/compost mix with 5% settling
Total Needed: 5 cubic yards topsoil (5.6 tons)
At $35/yd³ for quality topsoil plus $75 delivery, total cost is approximately $250. Mix 50/50 topsoil and compost for best results. Consider adding perlite or vermiculite for drainage. One cubic yard fills approximately 13.5 square feet at 12 inches deep. Use bagged soil for projects under 2 cubic yards. Calculate mulch needs with our mulch calculator for bed topping.
🏗️ Example 3: Driveway Base Preparation
Dimensions: 60 ft × 12 ft × 8 inches base + 4 inches subgrade
Volume: 720 sq ft × 1 ft total = 720 cubic feet (26.7 cubic yards)
Material: Compacted fill dirt with 20% compaction factor
Total Needed: 32 cubic yards fill dirt (35.2 tons)
This requires 3 dump truck loads. At $10/yd³ plus $120 delivery, material costs approximately $440. Compact in 4-inch lifts with plate compactor or roller. Allow 3-5 days for proper compaction and settling. Add 6-8 inches of gravel base over compacted fill before pouring concrete or asphalt. For concrete driveways, use our driveway calculator to estimate concrete needs.
Frequently Asked Questions
How much does a cubic yard of dirt weigh?
A cubic yard of dirt weighs between 2,000 and 2,700 pounds depending on moisture content and composition. Dry fill dirt weighs approximately 2,000 pounds per cubic yard, while moist topsoil can weigh up to 2,700 pounds per cubic yard. Clay-heavy dirt weighs more (2,400-2,700 lbs) than sandy fill dirt (2,000-2,200 lbs).
Moisture content significantly affects weight. Bone-dry dirt weighs 15-20% less than moderately moist dirt, while saturated dirt can be 25-35% heavier. For ordering purposes, use 2,200 pounds (1.1 tons) per cubic yard as the standard estimate for most dirt types. Confirm actual weight with your supplier to ensure truck capacity isn't exceeded.
How many cubic yards of dirt do I need for my project?
Calculate cubic yards by multiplying length × width × depth (in feet), then dividing by 27. For example, a 20 ft × 10 ft area with 6 inches of depth needs 3.7 cubic yards (20 × 10 × 0.5 = 100 cubic feet ÷ 27 = 3.7 cubic yards). Always add 5-10% extra for settling and compaction.
For irregular shapes, divide the area into rectangles and triangles, calculate each separately, then add the totals. Measure depth at multiple points and use the average for sloped or uneven areas. For raised beds, multiply inside length × inside width × depth to get accurate volume without counting frame thickness.
How much does dirt cost per cubic yard in 2026?
In 2026, fill dirt costs $8-$15 per cubic yard, topsoil costs $12-$50 per cubic yard, and screened loam costs $18-$60 per cubic yard. Delivery fees add $50-$150 depending on distance and load size. Bulk orders (10+ cubic yards) typically receive discounted pricing. Prices vary by region and supplier.
Budget dirt costs $8-$12/yd³ (fill dirt, unscreened topsoil), mid-grade topsoil runs $15-$30/yd³, and premium screened loam or compost-enriched topsoil costs $35-$60/yd³. Some suppliers offer free delivery on large orders (15+ yards). Call multiple suppliers for quotes - prices can vary 30-50% in the same area.
How many tons of dirt equal one cubic yard?
One cubic yard of dirt equals approximately 1 to 1.35 tons. Fill dirt weighs about 1 ton per cubic yard (2,000 lbs), while moist topsoil weighs 1.2-1.35 tons per cubic yard (2,400-2,700 lbs). For ordering purposes, use 1.2 tons per cubic yard as the standard conversion for most dirt types.
The ton-to-yard conversion depends on soil type and moisture: dry sandy fill (0.9-1.0 tons/yd³), standard fill dirt (1.0-1.1 tons/yd³), topsoil (1.1-1.2 tons/yd³), moist topsoil (1.2-1.35 tons/yd³), clay (1.3-1.35 tons/yd³). Some suppliers sell by ton rather than cubic yards - ask for both measurements to compare pricing accurately.
How many dump truck loads do I need for my dirt project?
Standard dump trucks carry 10-14 cubic yards of dirt per load. A small pickup truck holds 2-3 cubic yards, a dump trailer holds 6-8 cubic yards, and tri-axle dump trucks carry 15-18 cubic yards. For a 20 cubic yard project, you would need 2 standard dump truck loads or 1 tri-axle truck load.
Truck capacity depends on both volume and weight limits. A truck rated for 14 cubic yards may only carry 10-11 cubic yards of heavy, wet clay due to weight restrictions (typically 10-15 ton weight limits). Confirm both volume and weight capacity with your supplier. For residential projects, request smaller loads to avoid heavy trucks damaging driveways or compacting yard soil.
Do I need to account for soil compaction?
Yes, loose dirt compacts 10-25% after placement and settling. Order 15-20% extra dirt for projects requiring compaction (driveways, foundations). For raised beds and garden areas with minimal compaction, order 5-10% extra. Clay soil compacts less (10-15%) than sandy fill dirt (20-25%).
Compaction varies by application: hand-tamped raised beds (5% allowance), landscaping fills (10%), mechanically compacted base material (15%), structural fills under driveways (20%), deep foundation backfill (25%). Proper compaction requires moisture control and mechanical equipment (plate compactor, roller) for projects over 6 inches deep. Compact in 4-6 inch lifts for best results.
What's the difference between fill dirt and topsoil?
Fill dirt is subsoil used for grading, leveling, and filling holes. It contains little organic matter and costs $8-$15 per cubic yard. Topsoil is nutrient-rich surface soil for planting, containing organic matter and microorganisms, costing $12-$50 per cubic yard. Use fill dirt for structural projects and topsoil for gardens and lawns.
Fill dirt provides structural stability because it lacks organic matter that decomposes and causes settling. It's ideal for foundation backfill, leveling yards, and raising grades. Topsoil contains 20-50% organic matter (decomposed plant material) plus beneficial soil organisms. It holds moisture and nutrients for plant growth but shouldn't be used under structures. For multi-layer projects, use fill dirt as base and topsoil as the top 6-12 inches.
Can I calculate dirt volume for irregular shapes?
For irregular shapes, divide the area into rectangles, triangles, and circles, then calculate each section separately. Alternatively, measure the area in square feet and multiply by depth in feet, then divide by 27 to get cubic yards. For complex slopes, measure at multiple points and use the average depth for more accurate estimates.
Advanced technique: For curved or very irregular areas, use a measuring wheel to determine perimeter, then use the area formula A = perimeter × average width ÷ 2. For kidney-shaped or free-form areas, divide into smaller geometric shapes and sum the volumes. When in doubt, overestimate by 10-15% rather than running short mid-project. Professional landscapers use GPS measuring tools or laser measurement for large irregular sites.
Data Sources and Accuracy
- Soil weights and densities: USDA Natural Resources Conservation Service (NRCS), Soil Survey Manual 2026
- Material costs: National Association of Landscape Professionals (NALP), Regional supplier surveys 2026
- Compaction factors: American Society of Civil Engineers (ASCE), Geotechnical Engineering Standards
- Truck capacities: US Department of Transportation weight regulations, industry standard equipment specs
- Construction standards: International Building Code (IBC) 2024 edition, local code references
Last Updated: January 2026
Disclaimer: All calculations provide estimates based on industry-standard formulas and 2026 USA market data. Actual quantities and costs may vary based on local conditions, soil composition, moisture content, and supplier pricing. Always verify measurements on-site and confirm material specifications with your supplier before ordering. For structural projects, consult a licensed engineer or contractor for professional assessment and recommendations.
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Your privacy is our priority. This dirt calculator performs all calculations locally in your web browser - no data is transmitted to our servers, stored in databases, or shared with third parties. We do not collect, store, or track your project measurements, locations, or calculation results. Use this tool with confidence knowing your project details remain completely private.