Dirt Calculator
Accurately calculate how much topsoil, fill dirt, or compost you need for your landscaping project. Convert dimensions into cubic yards, estimate the weight in tons, and calculate total dump truck deliveries required.
Project Estimate
Whether you are building raised garden beds, grading a slope away from your foundation, or filling in an old swimming pool, ordering dirt requires precision. Ordering too little halts your project, while ordering too much leaves you with a massive, heavy pile of soil to dispose of.
Our interactive dirt calculator removes the guesswork. Simply input your measurements to find the exact volume in cubic yards, estimate the weight in tons based on specific soil densities, and calculate how many dump truck deliveries you will need to finish the job.
How to Calculate How Much Dirt You Need
Landscaping materials like topsoil, fill dirt, and mulch are universally sold and delivered by volume, specifically the cubic yard.
To use our dirt calculator cubic yards formula manually, you must find the geometric volume of the space you want to fill in cubic feet, and then divide by 27 (because there are exactly 27 cubic feet in one cubic yard).
The Dirt Volume Formula
Volume (Cubic Feet) = Length(ft) × Width(ft) × Depth(ft)
Example: A 20 ft by 10 ft garden bed filled 6 inches deep (0.5 ft).
20 × 10 × 0.5 = 100 Cubic Feet.
100 ÷ 27 = 3.7 Cubic Yards.
Note on Depth: The most common mistake homeowners make is multiplying inches directly with feet. If your depth is 4 inches, you must divide it by 12 to convert it to feet (4 ÷ 12 = 0.333 ft) before multiplying.
Converting Yards of Dirt to Tons (Density)
While you order dirt by the yard (volume), you haul dirt by the ton (weight). Knowing how many tons of dirt in a yard is critical so you don’t overload your pickup truck or trailer.
The weight of dirt depends entirely on its density and moisture content. Water is extremely heavy; dry dirt is much lighter than wet dirt. Below are standard industry averages for 1 cubic yard of material:
| Material Type | Est. Weight per Cubic Yard | Tons per Yard |
|---|---|---|
| Dry Topsoil | ~ 2,000 lbs | 1.0 Tons |
| Moist Topsoil (Average) | ~ 2,500 lbs | 1.25 Tons |
| Fill Dirt (Rocks/Subsoil) | ~ 2,400 lbs | 1.20 Tons |
| Sandy Loam | ~ 2,600 lbs | 1.30 Tons |
| Heavy Clay | ~ 2,800 lbs | 1.40 Tons |
| Garden Compost | ~ 1,600 lbs | 0.80 Tons |
How Much Does a Ton of Dirt Weigh?
People frequently search “how much does a ton of dirt weigh,” which is a trick question: a ton of dirt always weighs exactly 2,000 pounds.
The better question is: How much volume is a ton of dirt? As shown in the chart above, 1 ton of typical moist topsoil equals roughly 0.8 cubic yards. Visually, 1 ton of dirt is a small mound approximately 3 feet wide, 3 feet long, and roughly 2.5 feet tall.
Dump Trucks, Wheelbarrows, and Bags
Translating cubic yards into real-world labor helps you plan your weekend properly.
How many yards of dirt in a dump truck?
A standard single-axle dump truck generally holds between 5 and 7 cubic yards. A large tandem-axle dump truck (the massive ones you see on highways) typically hauls 10 to 15 cubic yards of dirt. If you use a dirt calculator tons estimate and need 30 yards, expect at least two large dump truck deliveries.
Wheelbarrows and Shoveling
A standard homeowner-grade wheelbarrow holds about 3 cubic feet of dirt if heavily heaped. Because there are 27 cubic feet in a yard, it takes exactly 9 full wheelbarrow trips to move 1 cubic yard of dirt.
Bagged Soil vs. Bulk Delivery
If you only need a small amount, buying bags at the hardware store makes sense. A standard 40lb bag of topsoil contains roughly 0.75 cubic feet of soil. It takes about 36 to 40 bags to equal one single cubic yard. If your dirt calculator for raised bed project requires 2 cubic yards, you are far better off paying for a bulk delivery rather than hauling 80 heavy bags in your car.
Cost of Dirt: Topsoil vs. Fill Dirt
The cost of dump truck of dirt depends heavily on the quality of the material you are buying.
- Fill Dirt ($10 – $20 per yard): This is unrefined subsoil containing rocks, clay, and sand. It lacks organic nutrients and is used strictly for building grades, filling massive holes, or creating a base layer.
- Topsoil / Loam ($20 – $45+ per yard): This is the nutrient-rich, dark top layer of earth that has been mechanically screened to remove rocks and roots. It is used for planting grass, gardens, and surface leveling.
Note on Delivery Fees: Most landscaping supply yards charge a flat delivery fee ranging from $50 to $150 per truckload, regardless of whether you order 2 yards or 10 yards. Always try to order all your material in a single delivery.
Special Cases: Pools, Slopes, and Compaction
The Compaction Factor
When soil is dug out of the earth and loaded into a truck, it becomes “fluffed” and full of air. When you dump it into your yard and it rains, it will settle and compress. If you are filling a deep hole (over 12 inches deep), you should use the fill dirt calculator with compaction feature and add an extra 20% to your total volume to account for this settling.
Filling a Swimming Pool
A common massive undertaking is filling an old in-ground pool. How many yards of dirt to fill a 20,000 gallon pool?
There are exactly 201.97 gallons in one cubic yard. Therefore, 20,000 gallons ÷ 202 = 99 cubic yards. Because a pool is a very deep hole, you must add 20% for compaction. 99 × 1.20 = 119 cubic yards of fill dirt required (approximately 8 to 10 massive dump truck loads).
Frequently Asked Questions
Reference: https://en.wikipedia.org/wiki/Dirt