Gravel Calculator
Estimate gravel for driveways, walkways, patios, garden beds, French drains, shed bases, parking pads, road base, and decorative rock projects.
Last Updated: May 16, 2026
Project area
Choose a shape and enter the dimensions for one or more matching sections.
Use this for repeated beds, driveway strips, or matching paths.
Gravel material and depth
Choose gravel type, depth, density, waste, and compaction. Supplier density is always best.
Driveways, base layers, drainage
Use 5% simple, 10% normal, 15% irregular, or 20% uneven.
Use 0% decorative, 5% light, 10% compacted, 15%+ heavy base.
Bags, delivery, and cost
Compare bags with bulk material, add delivery, and estimate project extras.
Used for pallet estimate only.
| Layer | Material | Depth | Volume | Weight |
|---|---|---|---|---|
| Primary layer | Crushed stone | 4 in | 5.867 cu yd | 9.09 tons |
| Option | Quantity | Material cost | Best use |
|---|---|---|---|
| Bulk delivery | 9.09 tons or 5.867 cu yd | $500.13 | Usually better for driveways, patios, parking pads, and multi-yard jobs. |
| Bagged gravel | 317 bags (6 pallets) | $1,743.50 | Useful for small beds, short paths, touch-ups, and no-delivery jobs. |
| Truckload planning | 1 load | 12 tons/load | Confirm legal payload and supplier delivery minimums. |
Cost estimate
Cost uses the selected buying method. Supplier quotes, delivery minimums, and local prices vary.
| Item | Estimated cost | Method |
|---|---|---|
| Bulk gravel material | $500.13 | Tons x price per ton |
| Delivery | $85.00 | Optional delivery or pickup fee. |
| Landscape fabric | $0.00 | Optional weed barrier cost. |
| Edging | $0.00 | Optional edging material cost. |
| Labor / equipment | $0.00 | Optional rental or installation estimate. |
| Tax / VAT | $0.00 | Applied to material and extra costs. |
| Total estimate | $585.13 | Planning estimate only. |
Cubic feet
158.4 cu ft
Cubic meters
4.485 m3
Kilograms
8,249 kg
Coverage per cu yd
81 sq ft
Gravel Planning Notice
This calculator provides material estimates only. Actual gravel needs can change with slope, subgrade, moisture, compaction, supplier density, stone size, drainage design, base-layer requirements, delivery limits, and installation method. Confirm large or structural projects with your supplier or a qualified local professional.
Checked by Jitendra Kumar
Gravel Calculator is checked for formula labels, source links, and result limits.
Jitendra Kumar, Founder & Editorial Standards Lead. Updated May 16, 2026. Scope: measurement calculators.
How to Use the Gravel Calculator
Select a project preset or choose a shape manually. Enter the area dimensions, gravel depth, gravel type, density, waste allowance, and compaction adjustment. For repeated sections, enter the number of matching areas.
Use the tons and cubic yards result for bulk supplier quotes. Use the bag count, pallets, and bag cost when the project is small enough for retail bags.
Step 1: Measure the area
Choose rectangle, square, circle, triangle, trapezoid, or known area and enter the project dimensions.
Step 2: Set gravel depth and type
Choose the gravel material, enter depth, and adjust density if your supplier gives a more precise value.
Step 3: Add waste and compaction
Use waste for cuts and uneven edges, then add compaction for driveway, patio, and base-layer projects.
Step 4: Compare bags and bulk delivery
Review bags, pallets, cubic yards, tons, truckloads, and the cost estimate before ordering.
How This Gravel Calculator Works
The calculator converts your dimensions to square feet, converts gravel depth to feet, and calculates base volume. For rectangles, the core formula is \(V=L\times W\times D\).
It then applies waste and compaction with \(\text{Adjusted quantity}=\text{Base quantity}\times(1+w)\times(1+c)\), converts cubic feet to cubic yards, and estimates tons from the selected gravel density.
Bag count is based on the entered bag volume and rounded up. Truckloads are rounded up from total tons and truck capacity. The cost estimate uses either bulk material price or bagged material price plus delivery, extras, and tax.
Gravel Planning Guide
Gravel Calculator Formula
| Formula | Expression | Use |
|---|---|---|
| Basic volume | \(V=L\times W\times D\) | Use for rectangular gravel areas after converting depth to feet. |
| Cubic feet to cubic yards | \(\text{Cubic yards}=\frac{\text{Cubic feet}}{27}\) | Bulk gravel is often quoted by cubic yard. |
| Tons estimate | \(\text{Tons}=\text{Cubic yards}\times\text{Density}\) | Density should come from the supplier when available. |
| Waste and compaction | \(\text{Adjusted quantity}=\text{Base quantity}\times(1+w)\times(1+c)\) | Adds extra material for cuts, uneven grade, settling, and compaction. |
| Total cost | \(\text{Total cost}=\text{Material}+\text{Delivery}+\text{Extras}+\text{Tax}\) | Combines bulk or bag material with optional project costs. |
Recommended Gravel Depth by Project
| Project | Typical depth | Common material |
|---|---|---|
| Decorative garden bed | 2 to 3 inches | Pea gravel, river rock, marble chips, or lava rock. |
| Walkway or path | 2 to 4 inches | Pea gravel or decomposed granite over a prepared base. |
| Patio base | 4 to 6 inches | Crushed stone or road base, compacted in layers. |
| Driveway top layer | 3 to 4 inches | Crushed stone or limestone over a stronger base layer. |
| Driveway base layer | 4 to 8 inches | Road base, crusher run, or compactable aggregate. |
| Parking or heavy vehicle area | 6 to 12 inches | Use site-specific base design for loads and soil. |
| French drain | Trench-specific | Drain rock around pipe and fabric based on drain design. |
| Shed base | 4 to 6 inches | Crushed stone or road base under a level pad. |
Gravel Density and Weight Guide
| Material | Approximate density | Typical use |
|---|---|---|
| Pea gravel | 1.3 to 1.5 tons/cu yd | Walkways, patios, garden paths. |
| Crushed stone | 1.4 to 1.7 tons/cu yd | Driveways, base layers, drainage. |
| River rock | 1.3 to 1.6 tons/cu yd | Decorative landscape beds. |
| Limestone gravel | 1.4 to 1.6 tons/cu yd | Driveways, drainage, construction. |
| Decomposed granite | 1.3 to 1.5 tons/cu yd | Paths and compacted surfaces. |
| Road base / crusher run | 1.5 to 1.8 tons/cu yd | Driveway foundation and parking areas. |
| Sand and gravel mix | 1.4 to 1.7 tons/cu yd | Backfill and construction aggregate. |
Cubic Yard Coverage Table
| Depth | Approximate coverage |
|---|---|
| 1 inch | 324 sq ft per cu yd |
| 2 inches | 162 sq ft per cu yd |
| 3 inches | 108 sq ft per cu yd |
| 4 inches | 81 sq ft per cu yd |
| 6 inches | 54 sq ft per cu yd |
| 12 inches | 27 sq ft per cu yd |
Common Gravel Sizes
| Gravel size | Common use |
|---|---|
| 3/8 inch | Pathways and decorative areas |
| 1/2 inch | Walkways and landscaping |
| 3/4 inch | Driveways, drainage, and general base material |
| 1 inch | Base layers and drainage |
| 1.5 inch+ | Heavy drainage and construction |
| Crusher run | Compacted driveway base |
| #57 stone | Drainage, driveways, and concrete base |
| #67 stone | Concrete, drainage, and paths |
Common Gravel Calculation Mistakes
| Mistake | Why it matters |
|---|---|
| Forgetting inch-to-foot conversion | Four inches is 0.333 feet, not 4 feet. |
| Confusing cubic yards and tons | Volume and weight are different; density connects them. |
| Skipping compaction | Driveways and base layers often settle or compact after installation. |
| Using a generic density | Supplier density, moisture, and stone type can materially change tonnage. |
| Ordering bags for a large job | Bulk delivery is often more practical once projects reach several tons. |
| Ignoring base layers | Decorative gravel is not a substitute for a structural driveway base. |
| Not checking delivery minimums | Suppliers may have minimum order sizes, truck limits, or access rules. |
For a driveway or patio, consider whether the top gravel layer is only one part of a deeper base system. The calculator includes an optional base layer for road base or crushed stone under the surface material.
If the project area is irregular, calculate each area first with the Room / Plot / Lot Area & Size Calculator, then return here to convert area and depth into gravel volume and tons. For nearby material projects, compare with the Concrete Calculator and Topsoil Calculator.
Keep the research moving with Concrete Calculator, Topsoil Calculator, Mulch Calculator, and Room / Plot / Lot Area & Size Calculator.
Frequently Asked Questions
Related Calculators
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Estimate topsoil cubic yards, bags, tons, and cost for lawn and garden fill projects.
Use Topsoil CalculatorMulch Calculator
Estimate mulch bags, cubic feet, cubic yards, liters, and cost for landscape beds.
Use Mulch CalculatorRoom / Plot / Lot Area & Size Calculator
Calculate area first when a gravel project has several rectangles, circles, or irregular sections.
Use Room / Plot / Lot Area & Size CalculatorSources & References
- 1.NIST Special Publication 811 - Guide for the Use of the International System of Units (SI)(Accessed March 2026)
- 2.BIPM - International System of Units (SI) resources(Accessed March 2026)
- 3.NIST Metric Program(Accessed March 2026)
- 4.UK National Physical Laboratory - Units and standards resources(Accessed March 2026)
- 5.International Bureau of Legal Metrology (OIML)(Accessed March 2026)