Use this free gravel calculator to estimate volume, cubic yards, tons, and gravel coverage for driveways, landscaping beds, and base layers. If you are asking how much gravel do I need, this page gives you a quick answer and the formulas behind it.
Calculate gravel needed
Pick a project type, choose the gravel material, and get instant results for yards, tons, truckloads, and a copy-friendly supplier summary.
Depth suggestion
Driveway projects often start around 0.10 meters before compaction and top-off.
Volume
5.00 m³
Cubic Feet
176.57 cu ft
Cubic Yards
6.54 cu yd
Estimated Tons
9.48 tons
Estimated Truckloads
1
Estimated Cost
Add price
Supplier-ready summary
You need about 6.54 cubic yards of crushed stone, or 9.48 tons, for this driveway project.
Gravel order summary
Driveway: 10.00 x 5.00 x 0.10 m
Gravel type: Crushed stone
Volume: 176.57 cu ft / 6.54 cu yd
Estimated tons: 9.48
Estimated truckloads: 1
What is a Gravel Calculator?
A gravel calculator is a digital tool used to determine the exact amount of stone required for a project. It converts your measurements into volume in cubic yards and weight in tons so you can order material with less guesswork.
Whether you are planning a garden path, a patio base, or gravel needed for driveway work, using a dedicated gravel volume calculator helps you avoid running short or over-ordering expensive material.
How to Calculate How Much Gravel You Need
Calculating gravel is a three-dimensional measurement problem. You are not only covering surface area, you are filling space to a specific depth. That is why length, width, and depth all matter when you estimate gravel coverage.
1. Measure the surface area
For rectangular projects, multiply length by width. For irregular layouts, split the area into smaller rectangles and total them. If you need area first, a square footage calculator can help.
2. Convert the depth
Convert inches into feet before calculating. For example, 3 inches becomes 0.25 feet, and 4 inches becomes 0.333 feet.
3. Find cubic feet
Multiply length, width, and depth in feet. This tells you the total volume your project requires.
4. Convert to cubic yards
Most suppliers sell by cubic yards, so divide cubic feet by 27. That is the same ordering logic used in a cubic yard calculator.
Pro tip: Measure depth at multiple points on uneven ground and use the average. That gives a more realistic gravel per square foot estimate before ordering.
Gravel Calculation Formula
Use these standard formulas to turn raw project dimensions into orderable quantities.
Volume = Length x Width x Depth
Step 1: Cubic feet
Length x Width x Depth = Cubic Feet
Step 2: Cubic yards
Cubic Feet / 27 = Cubic Yards
Step 3: Estimated tons
Cubic Yards x 1.4 = Total Tons
Density note
If you are comparing lighter aggregates, your ton multiplier may be closer to 1.2 or 1.3, similar to how a sand calculator uses a different density assumption.
Recommended Gravel Depth
Choosing the right depth affects drainage, durability, and cost. A shallow layer may not hold up, while an overbuilt section can waste material.
Project Type
Recommended Depth
Why It Works
Decorative landscaping
2 inches
Provides full coverage without adding unnecessary cost.
Walkways and footpaths
3 to 4 inches
Improves stability and keeps the subsoil from showing through.
Standard driveway
4 to 6 inches
Supports vehicle traffic more reliably than a shallow surface layer.
New driveway base
8 to 10 inches
Usually installed in layers for drainage and long-term strength.
Gravel Weight vs. Volume
Both measurements matter, and they answer different questions when you buy material.
Volume tells you how much physical space the gravel occupies.
Weight tells you how heavy the delivery is and how many tons you will be billed for.
That is why a gravel calculator in tons is so helpful. The volume tells you what fits the site, and the tonnage helps you compare quotes and truck capacity.
Unit Conversion Guide
If your measurements switch between feet, inches, yards, or meters, keep conversions consistent before you calculate.
Conversion
Value
1 yard
3 feet
1 cubic yard
27 cubic feet
1 cubic yard
About 1.4 tons
Inches to feet
Inches / 12
Meters to cubic yards
Cubic meters x 1.30795
Example Calculations
Here are two real-world scenarios to show how much gravel needed for driveway and landscape projects can vary with depth.
Driveway example: 40 ft x 10 ft
Area: 40 x 10 = 400 sq ft
Depth: 4 inches = 0.333 ft
Volume: 400 x 0.333 = 133.2 cu ft
Order size: 133.2 / 27 = 4.93 cubic yards
Landscape bed: 60 sq ft
Depth: 2 inches = 0.167 ft
Volume: 60 x 0.167 = 10 cu ft
Order size: 10 / 27 = 0.37 cubic yards
10 m x 5 m x 0.1 m = 5.00 m³5.00 m³ = 6.54 yd³6.54 yd³ x 1.4 = 9.16 tons
Gravel Coverage Guide
Coverage changes quickly as depth increases. This table gives a practical view of how many square feet one cubic yard can cover.
Depth
Coverage
Usage Case
1 inch
324 sq ft
Refreshing existing gravel beds
2 inches
162 sq ft
Standard landscaping and flower beds
3 inches
108 sq ft
Garden paths and foot traffic
4 inches
81 sq ft
Light driveway use and heavy paths
6 inches
54 sq ft
New driveway base layer
Ordering 10 to 15 percent extra is a practical buffer for compaction, settling, and uneven subgrade.
Ignoring compaction: Gravel settles, so order 10 to 15 percent extra for a safer buffer.
Mixing units: Switching between meters, feet, inches, and yards without converting leads to large errors.
Skipping a weed barrier: Without separation fabric, gravel can mix into the soil below over time.
Underestimating driveway depth: Vehicle traffic usually needs more depth than decorative areas.
Conclusion
A good gravel calculator turns a rough idea into a practical order size. By checking volume first, then converting to cubic yards and estimated tons, you can plan delivery more confidently and reduce waste.
Whether you are covering a garden bed or estimating gravel needed for driveway work, measure carefully, account for settling, and confirm material density with your supplier before you place the final order.
Frequently Asked Questions
How much gravel do I need for a 20x20 area?
For 400 square feet at 3 inches deep, you need 3.7 cubic yards, or about 5.2 tons of gravel.
How many tons are in a cubic yard of gravel?
A common planning estimate is 1.4 tons per cubic yard of standard gravel, although exact weight varies by material and moisture.
How deep should gravel be for a driveway?
Use at least 4 inches for resurfacing an existing driveway and around 8 inches for a new driveway build.
How do I convert cubic yards to tons?
Multiply the total cubic yards by 1.4 to get an estimated tonnage for standard gravel.
How much gravel is usually needed for landscaping?
A 2-inch depth is a common standard for decorative landscaping beds and light coverage areas.
How much gravel per square foot do I need for a path?
At a 3-inch depth, you will need approximately 12.5 pounds of gravel per square foot.
How can I estimate gravel quickly?
A quick rule of thumb is that 1 cubic yard covers about 100 square feet at 3 inches deep, then you can scale up or down.
How much does a cubic yard of gravel cover at 2 inches?
One cubic yard covers about 162 square feet at a 2-inch depth.
Why is my gravel calculation different from the supplier's?
Suppliers often estimate compacted volume. If you are compacting the stone, you may need to order around 20 percent more to keep the target depth after settling.
