Gravel Tonnage and Cost Calculator
Estimate gravel volume, compacted tonnage, bags, supplier minimums, delivery, and cost for multiple zones.
How to use the gravel calculator
- Measure the actual project. Break irregular work into separate sections and record finished dimensions consistently.
- Enter the core measurements. The quick view focuses on project geometry; add or subtract sections where the calculator supports multiple areas.
- Review purchasing assumptions. Open Advanced inputs to replace example prices, waste, coverage, density, pack size, minimum order, or delivery assumptions with current project information.
- Calculate and verify. Review the formula, limitations, whole-unit rounding, product instructions, and supplier requirements before purchasing.
Key inputs covered: Compaction allowance, Waste allowance, Material density, Bulk example price, Minimum order, Delivery charge, Bag volume, Bag example price, Area operation, Shape, and additional project-specific assumptions.
Result coverage: The gravel calculator reports 5 separate quantities so the primary estimate and its supporting purchase or planning values can be checked together.
Estimate gravel tons and cubic yards
Calculate multiple gravel zones, convert volume to tons with an editable density, and include compaction, bags, supplier minimums, delivery, and local prices.
Gravel volume and tonnage
Area times depth gives compacted volume. The calculator adds the entered compaction allowance before multiplying by material density to estimate loose order tons.
Driveways and French drains
For a complete driveway or drain assembly, use the related dedicated calculator to include fabric, pipe, truckloads, or other project-specific materials.
Gravel depth and volume reference
Installed depth changes bulk volume directly. The table shows geometric volume for 100 square feet before waste, compaction, settling, or supplier minimums.
| Installed depth | Cubic yards per 100 ft² |
|---|---|
| 1 in | 0.309 yd³ |
| 2 in | 0.617 yd³ |
| 3 in | 0.926 yd³ |
| 4 in | 1.235 yd³ |
Planning note: Volume equals area × depth, with 27 cubic feet per cubic yard. For gravel, confirm density, moisture, compaction, and delivered tonnage with the selected supplier or product.
How the estimate works
Net zone volume × compaction factor × waste factor × density gives estimated tons.
Density, moisture, grading, and compaction materially affect tonnage.
Assumptions, rounding, and limitations
Dimensions are treated as finished measurements. Only deductions and allowances entered above are included. Decimal measurements display to two places; purchase quantities round up when a whole container or piece is required.
- Use the quarry's density for the selected aggregate.
- Compaction allowance increases loose ordering quantity above finished volume.
- Prices are editable examples; delivery and minimums vary.
Sources and review
These references support unit conversions and selected planning assumptions. Product instructions and local requirements control the actual project.
Last reviewed: 2026-10-09
Editorial process
BuildPlanCalc publishes the formula, editable assumptions, limitations, and supporting references so the estimate can be checked rather than treated as a black box. See the calculation and review methodology, or report a correction.
Frequently asked questions
Are the results exact?
No. Results are planning estimates based on the dimensions and assumptions entered. Confirm product coverage, site conditions, and ordering rules with the supplier.
How do I convert gravel cubic yards to tons?
Multiply cubic yards by the supplier's tons-per-cubic-yard density. The value varies by aggregate type, grading, moisture, and compaction.