Gravel Calculator
Enter the length and width of the area, choose your measurement unit, and provide the desired gravel depth. The calculator estimates the required volume and converts it into an approximate weight, so you have a better idea of how many cubic yards, cubic feet, or tons of gravel to order.
Gravel Calculator
Estimate the gravel needed for driveways, walkways, patios, landscaping and other projects. Calculate volume, cubic yards, cubic meters, weight and an optional extra allowance.
Your gravel estimate
READYNeed to know how much gravel to order? The Toolivar Gravel Calculator estimates the amount of gravel needed for a driveway, walkway, patio, parking area, garden bed, or other landscaping project.
How Much Gravel Do I Need?
The amount of gravel you need depends mainly on area and depth.
For a simple rectangular area, the calculation starts with:
Length × Width × Depth = Volume
If your measurements are in feet, the result is cubic feet. To convert cubic feet into cubic yards:
Cubic yards = Cubic feet ÷ 27
For example, suppose you have a driveway that is 40 feet long and 12 feet wide, and you want a 4-inch layer of gravel.
First convert 4 inches to feet:
4 ÷ 12 = 0.333 feet
Then calculate the volume:
40 × 12 × 0.333 ≈ 160 cubic feet
Convert that to cubic yards:
160 ÷ 27 ≈ 5.93 cubic yards
So the project requires roughly 6 cubic yards of gravel before allowing for additional material.
The calculator handles these conversions automatically.
Why Gravel Depth Matters More Than You Might Think
It is easy to underestimate how much gravel a project needs because a few extra inches of depth can make a surprisingly large difference.
For example, a 2-inch layer and a 4-inch layer cover the same surface area, but the 4-inch installation requires twice as much material.
Typical gravel depths vary depending on the job:
| Project | Common gravel depth |
|---|---|
| Garden or decorative area | 1–2 inches |
| Light walkway | 2–3 inches |
| Patio or seating area | 2–4 inches |
| Gravel driveway | 4–8 inches |
| Parking or heavier-use area | 6+ inches |
These are general planning ranges rather than construction specifications. Actual depth should account for the existing ground, drainage, base material, traffic, and the type of gravel being installed.
Gravel Calculator by Cubic Yards
Gravel is frequently sold by the cubic yard, particularly when ordering larger quantities from landscape suppliers, quarries, and aggregate companies.
One cubic yard equals:
27 cubic feet
So if your calculator result is 135 cubic feet:
135 ÷ 27 = 5 cubic yards
That means you would need approximately 5 cubic yards of gravel before adding an allowance for waste or variations in depth.
When ordering, check how your local supplier sells the material. Some suppliers quote gravel by cubic yard, while others sell it by weight.
Gravel Calculator by Tons
Weight is another common way to purchase gravel.
The exact weight of a cubic yard varies because gravel is not one uniform material. Different rock types, particle sizes, moisture levels, and packing densities can produce different weights.
For estimating purposes, gravel is often somewhere around 1.3–1.8 tons per cubic yard, but the actual value can vary.
That is why a calculator should treat the tonnage result as an estimate, rather than pretending every cubic yard of gravel weighs exactly the same.
If you’re placing a large order, the most reliable approach is to ask the supplier for the bulk density or tons-per-cubic-yard figure for the specific gravel product you’re buying.
Gravel Coverage Calculator
Another way people think about gravel is coverage:
How many square feet will one cubic yard of gravel cover?
The answer depends almost entirely on the depth.
For example, approximately:
- At 1 inch, 1 cubic yard covers about 324 square feet.
- At 2 inches, about 162 square feet.
- At 3 inches, about 108 square feet.
- At 4 inches, about 81 square feet.
- At 6 inches, about 54 square feet.
These figures are based on volume and are useful for quick planning.
The deeper the gravel layer, the smaller the area one cubic yard can cover.
Gravel Calculator Formula
The basic gravel volume formula is:
Volume = Length × Width × Depth
When using inches for depth:
Depth in feet = Depth in inches ÷ 12
Then:
Cubic feet = Length × Width × Depth in feet
And:
Cubic yards = Cubic feet ÷ 27
For an estimated weight:
Weight = Volume × Material density
Because gravel density varies, the final tonnage should be treated as an approximation unless you have a density value supplied by the gravel seller.
Pea Gravel, Crushed Stone, and Other Gravel
“Gravel” can refer to several different materials, and they don’t all behave the same way.
Pea gravel
Pea gravel consists of small, rounded stones. It is popular for decorative landscaping, garden paths, playground areas, and some walkways.
Because the stones are rounded, they can move more easily under foot or vehicle traffic.
Crushed stone
Crushed stone has angular surfaces that can interlock more effectively. It is commonly used for driveways, paths, bases, and construction applications.
River rock
River rock is generally rounded and decorative. Larger river rock usually has different coverage characteristics from small gravel, so the supplier’s information is useful when calculating quantities.
Decorative landscape gravel
Decorative gravel comes in many sizes, shapes, and densities. The product’s actual bulk density can differ considerably between suppliers.
For this reason, volume calculations are generally more reliable than assuming one universal tons-per-yard conversion.
Before You Order Gravel
Before placing an order, have these numbers ready:
1. Surface dimensions
Measure the length and width as accurately as practical.
2. Planned depth
Decide how thick the gravel layer needs to be.
3. Gravel type
Different products can have different densities and coverage characteristics.
4. Quantity unit
Find out whether the supplier sells by cubic yard, cubic foot, ton, bag, or another unit.
5. Delivery limitations
A supplier may have minimum order quantities or different delivery charges for partial loads.
6. Extra allowance
Consider adding a small amount for uneven areas, settlement, and installation loss.
Doing these checks before ordering can prevent the two most common problems: buying too little and making a second delivery, or buying significantly more material than the project needs.