How to calculate gravel for your project
Start by measuring the longest length and widest width of the area. For irregular spaces, divide the project into smaller rectangles, calculate each one, and add the results together.
- Measure the area.Use consistent units and measure to the outside edge of the finished surface.
- Enter your planning depth.Use the depth specified for your project. The calculator does not choose an installation depth.
- Add an optional allowance.Optional extra for handling, site variation or waste starts at zero. No percentage is recommended.
- Confirm with your supplier.Enter bulk density, selling increment and price only from the material and supplier information you are using.
Use the depth specified for your project
Enter the planning depth specified for your project. Appropriate depth may depend on project design, material, base or subgrade, drainage, loading or use, and local or project requirements.
For projects with different layers or materials, calculate each layer separately. BuiltTally does not recommend a universal installation depth or provide engineering approval.
Why gravel density changes the order
A cubic yard describes space. A ton describes weight. Two materials can fill the same space but place very different loads on a truck—and on your budget.
Use the bulk density from your supplier, product data or project documentation when estimating weight. Density varies by material, grading, moisture and supplier condition.
Imperial density is US short tons / yd³; Metric density is kg/m³. Project volume × entered density gives estimated mass. Blank density leaves volume available without assuming weight.
Hypothetical geometry example
A hypothetical rectangle measuring 24 ft × 12 ft × 3 in has 288 ft² of area. Depth 3 ÷ 12 = 0.25 ft; 288 × 0.25 = 72 ft³; 72 ÷ 27 = 2.6667 yd³. 3 in is example input only. This is arithmetic, not an installation specification.
The geometric volume is 2.67 cubic yards when displayed to two decimals. Optional extra changes project volume. Enter valid density for weight, then your supplier's mass increment for upward ordering. Enter USD per short ton or metric tonne for material cost; confirm delivery, tax and other charges separately.
Gravel calculator FAQ
How much gravel do I need?+
Multiply length by width by your entered depth in compatible units to find volume. Add optional extra if needed. Enter bulk density for estimated weight. No separate compaction model is applied.
How much area does one ton of gravel cover?+
Coverage is volume divided by entered depth. Weight divided by your supplier's bulk density gives volume. Without both density and depth, one ton cannot determine coverage.
Should I order gravel by the ton or cubic yard?+
Use the basis your supplier quotes. This calculator provides volume directly and optional mass estimates from entered density. It does not choose a supplier or selling basis.
How deep should gravel be?+
BuiltTally calculates the depth you enter. It does not recommend a universal installation depth. Follow your project's design and requirements; the initial 3 in is example input only.
Can I calculate an irregular area?+
Yes. Break the project into rectangles, calculate each section separately, and add the quantities before applying the extra-material allowance.
Why doesn't BuiltTally provide one gravel density?+
Bulk density varies by material, grading, moisture and supplier condition. Enter a value from the material, supplier or project information you are using. No density is selected automatically.
Why are order and cost unavailable?+
Mass ordering requires valid entered density and supplier increment. Exact mass cost requires density and price; rounded-order cost also requires an increment. Blank or invalid optional inputs do not erase valid volume.
Does the estimate include compaction?+
Only the optional extra allowance entered above is included. Compaction is not separately modeled.