Gravel Calculator
How to use this calculator
Calculate the amount of gravel, sand, or crushed stone you need. Get estimates in cubic yards and tons for any landscape or driveway project.
Introduction to Gravel Calculator
How to Use the Gravel Calculator
- Step 1: Measure Your Project Area: Measure the length and width of the area in feet. For curved driveways, measure the average width and the total centerline length.
- Step 2: Determine Desired Depth: Choose the thickness of the gravel layer in inches. (Standard: 2-3" for paths, 4-6" for driveways, 6-8" for heavy-duty bases).
- Step 3: Select Gravel Type: Choose the type of stone (e.g., Pea Gravel, #57 Crushed Stone, or Crusher Run). This determines the density and compaction rate.
- Step 4: Account for Compaction: If you are using "Crusher Run" or a base material that will be vibrated/rolled, add 15-20% to your volume to account for material settling.
- Step 5: Review Tons and Yards: Our tool provides the total in both cubic yards (volume) and tons (weight), as quarries sell by both units.
Understanding Gravel
The key to a successful gravel project is Sub-Base Preparation. You cannot simply pour gravel onto bare soil and expect it to stay there. Over time, the gravel will sink into the dirt, creating mud and ruts. Professionals always use a Geotextile Fabric (weed barrier) between the soil and the gravel. This fabric prevents the two layers from mixing while still allowing water to drain. For driveways, a "multi-layer" approach is best: start with a 4-inch base of large #3 or #4 crushed stone for drainage, followed by a 2-inch "topping" of smaller #57 stone. Our calculator allows you to estimate each layer separately to ensure your driveway has the structural integrity to support vehicles without shifting.
Understanding the difference between Weight and Volume is critical when ordering. Gravel is typically sold by the "ton," but it is measured by the "cubic yard." One cubic yard of standard crushed stone weighs approximately 2,800 to 3,000 pounds (1.4 to 1.5 tons). However, wet gravel or denser stones like granite can weigh significantly more. Our tool uses a standard conversion factor of 1.4 tons per yard, which is the industry average for dry construction gravel. Always check with your local supplier for the specific "density" of their stone to refine your order. Additionally, consider the Delivery Access; a standard dump truck can carry 10-15 tons. If your project requires 20 tons, you will need to budget for two delivery fees.
Formula & Calculation Method
Volume is Length x Width x Depth. Weight is Volume x Density.
Example Calculation:
A 20x20 patio with 3 inches of gravel: (20 x 20 x 0.25) / 27 = 3.7 yards. 3.7 x 1.4 = 5.2 tons.
Tips for Accurate Results
- 1Order 10% more than the calculated amount to account for low spots in the sub-grade and material lost during spreading.
- 2Use a landscape rake to spread gravel; it has wider teeth than a garden rake and will help you achieve a perfectly level surface.
- 3For driveways, use "Crushed Concrete" or "Recycled Asphalt" as a budget-friendly base layer.
- 4Install a solid border (wood, plastic, or metal edging) to keep your gravel from migrating into your lawn or flower beds.
- 5If your gravel is for drainage (like a French drain), use "washed" stone that is free of "fines" (dust) to prevent clogging.
Key Facts About Gravel
- •One cubic yard of gravel weighs approximately 1.4 tons (2,800 lbs).
- •Standard dump trucks carry 10-15 tons of material per load.
- •A 4-inch depth is the minimum recommended for a stable gravel driveway.
- •Geotextile fabric prevents gravel from sinking into the subsoil over time.
- •Crushed stone #57 is the most common size for residential driveways.
Frequently Asked Questions
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