What Is the Fill Dirt Calculator?
The Fill Dirt Calculator is a free online tool designed for contractors and DIY builders who need quick, accurate calculations in the construction and building space. By entering your area input method, length, width, you get instant results including cubic yards, weight. No formulas to memorize, no spreadsheets to build — just enter your numbers and get the answer in seconds. Whether you're a beginner or experienced professional, this calculator saves you time and eliminates guesswork.
Why This Calculation Matters
Getting cubic yards right can make the difference between success and costly mistakes. In construction and building, small errors compound quickly. Manual calculations are error-prone and time-consuming, especially under pressure. This calculator applies proven formulas used by contractors and DIY builders worldwide, giving you confidence that your numbers are correct. Use it to plan your projects with precision and avoid common pitfalls that trip up beginners.
When Should You Use This Calculator?
This tool is most useful when you know your area input method and need to find the right cubic yards. It's also great for quick estimates before committing to a decision, and to double-check manual calculations or professional quotes, and when comparing different scenarios side by side. Bookmark this page and come back whenever you need a fast, reliable answer — the calculator is always free and requires no signup.
Fill Dirt Calculator
Quick Presets
Fill Dirt Volume & Weight Reference
Includes 20% compaction factor. Weight at 2,000 lbs/yd³.
| Area (sq ft) | 6" Compacted (yd³) | Order (with 20%) | Weight (tons) | Truckloads |
|---|---|---|---|---|
| 100 | 1.85 | 2.22 | 2.22 | 1 |
| 250 | 4.63 | 5.56 | 5.56 | 1 |
| 500 | 9.26 | 11.11 | 11.11 | 2 |
| 1,000 | 18.52 | 22.22 | 22.22 | 3 |
| 2,500 | 46.30 | 55.56 | 55.56 | 6 |
| 5,000 | 92.59 | 111.11 | 111.11 | 12 |
How to Use This Calculator
- Enter Your Area Input Method: Start by entering your area input method — this is the primary input for the calculation.
- Fill In Additional Details: Complete the remaining fields: length, width, total area, depth, compaction factor, price per cubic yard. Each value refines the calculation for greater accuracy.
- Click Calculate: Hit the Calculate button to run the numbers. Results appear instantly below.
- Review Your Results: Check your cubic yards, weight. Use these figures to inform your next decision or compare against alternative scenarios.
How It Works
Fill dirt is used to raise grades, fill holes, and prepare building sites. The key to ordering the right amount is accounting for compaction — loose dirt settles 15-25% when compacted.
The basic rule:
- Volume: Area (sq ft) × Depth (inches) / 12 = cubic feet. Divide by 27 for cubic yards
- Compaction factor: If you need 10 yd³ of compacted fill, order 12 yd³ (20% extra) to account for settling
- Fill dirt weighs approximately 2,000 lbs (1 ton) per cubic yard. Clean fill may weigh slightly more
Clean fill dirt is free of organic matter, debris, and contaminants. It is required for most construction projects. Structural fill must be placed in 6-8 inch lifts and compacted to 95% density with a plate compactor or roller.
Tips & Considerations
- Double-check your area input method before calculating — even small input errors can significantly change your results.
- Run the calculator with different values to compare scenarios and find the optimal approach for your situation.
- Pay attention to both cubic yards and weight — they work together to give you the full picture.
- Bookmark this page for quick access next time you need to plan your projects.
- If you're unsure about your price per cubic yard, start with a conservative estimate and adjust from there.
Frequently Asked Questions
What is the difference between fill dirt and topsoil?
Fill dirt is subsoil — it lacks organic matter and nutrients, making it stable for building on. Topsoil is the nutrient-rich top layer used for growing plants. Never use topsoil as structural fill (it settles) and never plant in fill dirt (nothing grows well in it).
How much does fill dirt weigh?
Fill dirt weighs approximately 2,000 lbs (1 ton) per cubic yard when dry and loose. Compacted fill dirt weighs about 2,400-2,600 lbs per yard. Wet fill dirt can weigh up to 3,000 lbs per yard. Always account for moisture when estimating truck capacity.
What is a compaction factor?
Loose fill dirt contains air pockets. When compacted (tamped, rolled, or vibrated), it loses 15-25% of its volume. If you need 10 cubic yards of compacted fill in place, you need to order 12-12.5 cubic yards of loose fill dirt to end up with the right amount.
How much does fill dirt cost?
Fill dirt costs $5-$25 per cubic yard, plus $50-$200 for delivery. Clean fill (tested, debris-free) costs $10-$30/yard. Some excavation contractors give away fill dirt for free — check local classifieds. Delivery is the biggest cost for small quantities.
How do I compact fill dirt properly?
Place fill in 6-8 inch lifts (layers). Compact each lift with a plate compactor or jumping jack before adding the next. Moisten the dirt slightly for best compaction — not muddy, just damp. For structural fill, compact to 95% Proctor density per engineering specs.
Can I use fill dirt for grading around my house?
Yes, fill dirt is ideal for grading. Slope the grade away from your foundation at 1 inch per foot for the first 6 feet. Cap the fill dirt with 4-6 inches of topsoil for planting. Do not use fill dirt that contains debris, concrete chunks, or organic matter.