Gravel answer guide

How much gravel do I need?

Estimate gravel quantity from area, depth, cubic yards, tons, density, waste, truckloads, supplier weight, delivery, and spreading cost.

Reviewed - May 27, 2026

Short answer

For a simple gravel area, multiply length by width, convert depth from inches to feet, multiply for cubic feet, divide by 27 for cubic yards, add waste, then convert cubic yards to tons with the selected gravel density.

For a 30 ft by 10 ft area at 3 in deep, the current calculator estimates 75.0 cu ft before waste, 3.1 cu yd for ordering, and 4.5 tons of crushed stone after the 10% waste and compaction buffer.

If a supplier quotes a known weight, use known-tons mode instead of adding waste again. For example, 22.0 tons of crushed stone converts to about 15.2 cu yd and 3 truckloads at 8.0 tons per load.

Use driveway-layer mode when the project has separate sub-base, base, and top layers instead of one uniform gravel depth.

Use the gravel calculator

Gravel quantity method

Calculate area: length x width.
Convert gravel depth from inches to feet by dividing by 12.
Calculate cubic feet: area x depth in feet.
Convert to cubic yards: cubic feet / 27.
Add waste and compaction buffer, then round the order volume up to the nearest tenth of a cubic yard.
If you already have supplier tons, divide tons by the selected material density to estimate cubic yards instead of adding another waste buffer.
Convert cubic yards to tons using the selected gravel type's density, then round up for ordering and truckload planning.

Quick examples

10 ft by 10 ft path

1.6 tons

3 in deep, crushed stone, 10% waste

30 ft by 10 ft area

4.5 tons

3 in deep, crushed stone, 10% waste

5 cu yd pea gravel

6.8 tons

Known supplier volume, 10 ton truckload

22 tons known crushed stone

22.0 tons

Supplier weight, 8 ton truckload

50 ft by 12 ft parking pad

12.9 tons

4 in road base, 12% waste

40 ft by 12 ft driveway

26.2 tons

Layered road base, crushed stone, and pea gravel

These generated examples use the current U.S. default gravel assumptions: 27 cu ft per cubic yard, selected gravel density, rounded order volume, known-tons conversion, and a waste or compaction buffer where area is entered.

Worked example

30 ft by 10 ft area, 3.0 in deep.

Gravel weight

4.5 tons

3.1 cu yd including 10% waste

Order volume

3.1 cu yd

4.5 tons at 1.45 tons/cu yd

Truckloads

1 truckload

10.0 tons per load planning capacity

Calculated volume

75.0 cu ft

300 sq ft at 3.0 in deep

Density

1.45 tons/cu yd

crushed stone planning factor

DIY material total

$203–$543

Gravel plus directional delivery fee

Installed total

$353–$1,203

Material, delivery, and labor

Starter shopping list

crushed stone 4.5 tons
Landscape fabric, edging, compactor rental As needed
Truckload planning 1 truckload at 10.0 tons per load
Delivery Confirm minimum load and drop location

This example is generated from the same calculator logic used on the Gravel calculator page.

Depth and compaction

Decorative paths may only need a few inches, while driveways often need compacted layers and a stronger base design.
Waste and compaction buffer covers settling, uneven grade, spreading loss, and supplier rounding, but it is not a substitute for base design.

Tons or cubic yards

Suppliers may quote by cubic yard, ton, or truckload, so keep both cubic yards and tons in the estimate.
Density changes by gravel type, moisture, stone size, and compaction; use the supplier's conversion when it is available.

Supplier quotes and load sizes

Use known-volume mode when a landscape yard quotes cubic yards, and known-tons mode when the quote or scale ticket is already in tons.
Truckload count rounds up from tons divided by the load size you enter, but local minimums, split loads, and access limits can still change delivery planning.

Delivery and site work

Confirm truck access, dump location, minimum load, delivery fee, and wheelbarrow distance before ordering.
Plan edging, geotextile fabric, drainage, grading, and compaction separately from the basic material quantity.

Common mistakes

Using gravel depth in inches directly instead of converting it to feet.
Ordering cubic yards without checking whether the supplier quotes gravel by ton.
Using one density conversion for crushed stone, pea gravel, decomposed granite, and road base.
Adding waste again after entering a supplier-provided known volume or known weight.
Skipping waste, compaction, and truckload rounding.
Treating a driveway like a single decorative layer instead of separate sub-base, base, and top layers.
Forgetting delivery access, edging, fabric, drainage, grading, and compactor rental.

FAQ

How do I calculate how much gravel I need?

Multiply length by width for area, multiply by depth in feet for cubic feet, divide by 27 for cubic yards, add waste, then convert to tons using the selected gravel density.

How many tons of gravel do I need for a 30 by 10 area?

For a 30 ft by 10 ft area at 3 in deep with 10% waste, the generated example estimates 3.1 cu yd and 4.5 tons of crushed stone.

Should I order gravel by tons or cubic yards?

Use the unit your supplier quotes, but compare both. Cubic yards measure volume, tons measure weight, and the conversion depends on gravel type and density.

How many cubic yards is 22 tons of crushed stone?

Using the calculator's current crushed stone planning factor of 1.45 tons per cubic yard, 22.0 tons converts to about 15.2 cu yd. With an 8.0 ton load size, that rounds to 3 truckloads.

How deep should gravel be?

A few inches can work for decorative paths and beds. Driveways usually need a compacted base and may require separate sub-base, base, and top layers based on soil, drainage, and expected loads.

Does the gravel estimate include delivery and spreading?

The worked example includes a directional delivery allowance and spreading labor range, but local delivery minimums, dump location, grading, compaction, and access can change the actual cost.