Do you need to order dirt for a landscaping project? You might be wondering, “How much yard of dirt do I need?” The answer depends on the size and depth of the area you plan to fill. This guide will help you figure that out.
Dirt is typically sold by the cubic yard. This means you need to calculate the volume of the space you want to fill with dirt. Don’t worry; it’s not as complicated as it sounds. We’ll break down the steps so you can confidently order the right amount of dirt for your project.
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Figuring Out Your Dirt Needs
To accurately determine how much dirt you need, you’ll have to do some measuring and a bit of math. The good news is that if you can measure length, width, and depth, you can calculate your dirt needs.
How to Measure for Dirt
Before you can use a soil volume calculator, you need to get the right measurements. For simple, rectangular or square areas, this is straightforward.
- Measure the Length: Use a tape measure to find the longest side of the area.
- Measure the Width: Measure the shortest side of the area.
- Measure the Depth: This is how deep you want the dirt to be. For example, if you’re adding a layer of soil for a garden bed, you’ll measure how deep that bed needs to be.
Important Note on Depth: Always measure depth in feet, just like you measure length and width. If you’re measuring in inches, you’ll need to convert it to feet later. There are 12 inches in one foot. So, if you need 6 inches of dirt, that’s 0.5 feet (6 inches / 12 inches/foot = 0.5 feet).
Calculating Volume: The Basics
Once you have your measurements, you’ll use a simple formula to find the volume.
Volume = Length × Width × Depth
However, this will give you the volume in cubic feet. Since dirt is sold in cubic yards, you’ll need to convert this.
Converting Cubic Feet to Cubic Yards
This is where many people get a bit mixed up. You need to know how many cubic feet in a yard of dirt.
- One yard is equal to 3 feet.
- A cubic yard is a cube that is 3 feet long, 3 feet wide, and 3 feet high.
- So, a cubic yard is 3 feet × 3 feet × 3 feet = 27 cubic feet.
Therefore, to convert your cubic feet measurement to cubic yards, you will divide your cubic feet total by 27.
Cubic Yards = Cubic Feet / 27
Let’s walk through an example.
Example: You have a garden bed that is 10 feet long, 5 feet wide, and you want to add 6 inches (0.5 feet) of topsoil.
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Calculate Volume in Cubic Feet:
- Length = 10 feet
- Width = 5 feet
- Depth = 0.5 feet
- Volume = 10 ft × 5 ft × 0.5 ft = 25 cubic feet
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Convert to Cubic Yards:
- Cubic Yards = 25 cubic feet / 27 cubic feet/cubic yard ≈ 0.93 cubic yards
In this case, you’d likely want to round up to at least 1 cubic yard to be safe.
Using a Cubic Yard Dirt Calculator
Most people don’t want to do the math manually every time. Fortunately, there are many online tools available to help. A cubic yard dirt calculator or soil volume calculator can save you time and prevent errors.
How Online Calculators Work
These calculators typically have fields where you enter your length, width, and depth measurements. You might also be able to select the units you used (feet or inches). The calculator then automatically performs the conversion and gives you the total cubic yards needed.
Tips for Using Online Calculators:
- Double-Check Your Measurements: Make sure you entered the correct numbers.
- Be Specific with Depth: If your project has varying depths, it’s best to calculate each section separately or use an average depth.
- Look for Built-in Conversion: Some calculators handle inch-to-foot conversions automatically, but it’s always good to check the instructions.
Dealing with Irregular Shapes
Not all areas are perfect rectangles or squares. If you have an oddly shaped area, like a circular flower bed or a long, winding path, you’ll need to adapt your measurements.
Circular Areas
For a circular area, you’ll need the radius. The radius is the distance from the center of the circle to its edge.
- Measure the Diameter: Measure straight across the circle through the center.
- Calculate the Radius: Radius = Diameter / 2.
The formula for the volume of a cylinder (which is what you’re filling) is:
Volume = π × Radius² × Depth
(Where π, or pi, is approximately 3.14159)
Let’s use an example: A circular flower bed with a diameter of 6 feet and a desired depth of 4 inches (0.33 feet).
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Calculate Radius:
- Diameter = 6 feet
- Radius = 6 ft / 2 = 3 feet
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Calculate Volume in Cubic Feet:
- Volume = π × (3 ft)² × 0.33 ft
- Volume = 3.14159 × 9 sq ft × 0.33 ft
- Volume ≈ 9.33 cubic feet
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Convert to Cubic Yards:
- Cubic Yards = 9.33 cubic feet / 27 cubic feet/cubic yard ≈ 0.34 cubic yards
Again, you’d round up to 1 cubic yard.
Irregular Shapes
For truly irregular shapes, you can try breaking them down into smaller, more manageable shapes like rectangles, squares, and triangles. Calculate the volume of each section and then add them together.
Another method for very complex shapes is to use a grid system. You can lay out a grid over your area and estimate the volume of dirt needed for each grid square.
Types of Dirt and Their Costs
The type of dirt you need can significantly impact the price. Knowing the difference between topsoil, fill dirt, and compost will help you make the right choice and manage your budget.
Topsoil
Topsoil is the uppermost layer of soil, rich in organic matter and nutrients. It’s ideal for planting, gardens, lawns, and general landscaping where healthy plant growth is a priority.
- Cost of Topsoil per Yard: The cost of topsoil per yard can vary widely depending on your location, the quality of the topsoil, and whether it’s screened or unscreened. Generally, expect to pay between $25 and $60 per cubic yard for good quality topsoil.
Fill Dirt
Fill dirt is often less refined than topsoil. It’s typically used for leveling ground, filling holes, or building up areas. It might contain more rocks, clay, or sand and less organic matter.
- Fill Dirt Cost: Fill dirt cost is usually lower than topsoil. You might find it ranging from $10 to $30 per cubic yard. However, it’s crucial to ensure the fill dirt is suitable for your specific purpose and doesn’t contain anything harmful.
Other Soil Amendments
You might also encounter compost, sand, or gravel, which are often used in combination with topsoil or fill dirt to improve drainage or soil structure.
Dirt Delivery Cost Per Yard
When you order dirt, you’ll likely need it delivered. The dirt delivery cost per yard is an important factor to consider.
- Delivery Fees: Delivery charges are typically based on the distance from the supplier to your location and the quantity of dirt being delivered. Some suppliers might charge a flat delivery fee, while others might charge per cubic yard delivered or by the trip.
- Minimum Orders: Many suppliers have minimum order quantities, often around 5 to 10 cubic yards. If you need less than this, you might still be charged for the minimum amount.
- Accessibility: Ensure your delivery location is accessible for a large truck. If the truck has trouble reaching your site, there might be additional charges.
Average Delivery Costs: Delivery fees can range from $50 to $200 or more, depending on these factors. It’s always best to get a quote that includes both the dirt and the delivery.
Calculating Total Cost
Once you’ve figured out how many cubic yards you need and researched the types of dirt and delivery costs, you can estimate your total expense.
Total Cost = (Quantity of Dirt × Dirt Price per Cubic Yard) + Delivery Cost
Example: You need 8 cubic yards of topsoil, which costs $40 per cubic yard, and the delivery fee is $100.
- Cost of Dirt: 8 cubic yards × $40/cubic yard = $320
- Total Cost: $320 + $100 = $420
How to Order Dirt
Ordering dirt is usually a straightforward process, but following these steps will make it smoother.
Step 1: Measure and Calculate
As we’ve covered, the first step is to determine the exact volume of dirt you need using your measurements and a soil volume calculator or by doing the math yourself. Remember to add a little extra (about 10%) to account for settling and any slight measurement inaccuracies.
Step 2: Identify Your Needs
Decide what type of dirt you require: screened topsoil for gardens, fill dirt for leveling, or a mix.
Step 3: Find Local Suppliers
Search online for “soil suppliers near me,” “topsoil delivery,” or “bulk dirt delivery.” Look for companies that specialize in landscaping materials.
Step 4: Get Quotes
Contact several suppliers to get quotes. Be sure to ask for:
- The price per cubic yard for the type of dirt you need.
- The dirt delivery cost per yard or total delivery fee.
- Any minimum order requirements.
- The typical delivery timeframe.
- Whether the dirt is screened or unscreened.
Step 5: Place Your Order
Once you’ve compared prices and services, place your order. Be prepared to provide:
- Your delivery address.
- The type and quantity of dirt.
- Your preferred delivery date and time (if possible).
- Any specific instructions for the delivery driver (e.g., where to dump the dirt).
Step 6: Prepare for Delivery
- Ensure the delivery area is accessible and clear of obstacles.
- Mark the exact spot where you want the dirt dumped if you have specific requirements.
- Be present for the delivery if possible to confirm the quantity and quality.
Factors Affecting Dirt Price
Besides the type of dirt, several other factors can influence the dirt per cubic yard price.
Quality and Screening
- Screened Dirt: This dirt has been put through a screen to remove rocks, roots, and debris. It’s generally more expensive but ideal for fine landscaping and gardening.
- Unscreened Dirt: This dirt is usually cheaper but may contain more organic matter, rocks, and other materials.
Organic Content
Topsoil with a higher percentage of organic matter will command a higher price because it’s richer and better for plant growth.
Location and Transportation
The distance from the soil quarry or source to the supplier, and then to your location, plays a significant role in the cost. Suppliers closer to you will likely have lower delivery fees.
Seasonality
Demand for landscaping materials can fluctuate throughout the year. Prices might be higher during peak spring and summer seasons.
Volume Discounts
Some suppliers offer discounts for larger orders, so if you need a substantial amount of dirt, it might be worth negotiating for a better price.
Common Mistakes to Avoid
Even with careful planning, mistakes can happen. Here are a few common pitfalls to watch out for when calculating and ordering dirt.
Underestimating Needs
It’s always better to order slightly more dirt than you think you need. A 10% buffer is a good rule of thumb. Running out of dirt mid-project means you’ll have to place another order, potentially incurring extra delivery fees and delays.
Overestimating Needs
While it’s good to have a little extra, ordering far too much can be wasteful and costly. Accurate measurements are key to avoiding this.
Incorrect Depth Measurement
Not converting inches to feet correctly is a very common error. Always ensure your depth measurement is in feet before plugging it into volume calculations.
Ignoring Delivery Costs
The price of the dirt itself is only part of the equation. Delivery fees can sometimes double the overall cost, so always factor them in when comparing suppliers.
Not Specifying Dirt Type
If you order generic “dirt” without specifying, you might receive fill dirt when you really needed premium topsoil for your flower beds, leading to disappointing results.
When to Call a Professional
For very large or complex projects, or if you’re unsure about your measurements or the best type of soil, it’s wise to consult with a landscaping professional or a reputable landscape supply company. They can help you accurately calculate your needs and recommend the best materials for your specific project.
Frequently Asked Questions (FAQ)
How do I calculate how much soil I need for a garden bed?
To calculate soil for a garden bed, measure its length, width, and desired depth in feet. Then, multiply these three numbers together (Length × Width × Depth) to get the volume in cubic feet. Finally, divide the cubic feet by 27 to convert it to cubic yards. You can use a soil volume calculator online to simplify this process.
What is the difference between topsoil and fill dirt?
Topsoil is the nutrient-rich, uppermost layer of soil, ideal for planting and gardening. Fill dirt is generally less refined and is used for leveling ground, filling holes, or building up areas. Topsoil is typically more expensive than fill dirt.
Can I order less than a cubic yard of dirt?
While you can technically order less, many suppliers have minimum order quantities, often around 5 to 10 cubic yards. If you need a small amount, you might still be charged for the minimum delivery, or you might be better off buying bagged soil from a garden center.
How do I calculate the amount of dirt needed for a lawn?
For a new lawn, you’ll typically need a layer of topsoil, often 4 to 6 inches deep. Measure the total area of your lawn in square feet and the desired depth in feet. Multiply the area by the depth to get cubic feet, then divide by 27 for cubic yards. For example, a 1000 sq ft lawn needing 4 inches (0.33 ft) of topsoil would require approximately 1000 × 0.33 / 27 = 12.2 cubic yards.
How much does dirt delivery cost per yard?
The dirt delivery cost per yard varies significantly based on your location, the distance from the supplier, and the total volume ordered. Delivery fees can range from $50 to $200 or more. It’s best to get a specific quote from your chosen supplier.
By following these guidelines and using a cubic yard dirt calculator, you can confidently calculate exactly how much yard of dirt you need for your next project.