Gravel Calculator

A gravel calculator estimates the volume of gravel required to cover a measured area at a specified depth.

The basic calculation uses:

• Length
• Width
• Gravel depth

For example, a gravel area measuring:

20 ft × 10 ft × 3 in

requires approximately:

50 cubic feet

or:

1.85 cubic yards

The estimated weight in tons depends on the density of the gravel being used.

A gravel driveway calculator uses the same basic principle but may involve larger dimensions and deeper gravel layers.

You can also explore our Home Improvement Calculators for mulch, concrete, fencing, roofing, flooring, and other project material estimates.

How to Calculate Gravel

To calculate gravel volume for a rectangular area:

Step 1: Calculate Surface Area

Area = Length × Width

Step 2: Convert Depth to Feet

Depth in Feet = Depth in Inches ÷ 12

Step 3: Calculate Cubic Feet

Cubic Feet = Length × Width × Depth in Feet

Step 4: Convert to Cubic Yards

Cubic Yards = Cubic Feet ÷ 27

because:

1 cubic yard = 27 cubic feet

If you need to measure the driveway, path, or landscaping area first, use our Square Footage Calculator to calculate the total surface area.

Worked Example

Suppose you want to cover an area measuring:

Length: 20 ft
Width: 10 ft
Depth: 3 in

Convert depth:

3 ÷ 12 = 0.25 ft

Calculate volume:

20 × 10 × 0.25 = 50 cubic feet

Convert to cubic yards:

50 ÷ 27 = 1.85 cubic yards

Estimated gravel volume:

Approximately 1.85 cubic yards

How to Use the Gravel Calculator

1. Measure the Length

Measure the project from one end to the other.

Example:

30 feet

2. Measure the Width

Measure the width of the area.

Example:

12 feet

3. Enter the Desired Depth

Enter how deep the gravel layer will be.

Example:

4 inches

4. Calculate Gravel Volume

The calculator converts the measurements into cubic feet and cubic yards.

5. Estimate Tons if Needed

If the calculator supports gravel density, it can convert volume into an estimated number of tons.

Always confirm the supplier’s material weight before placing a large order.

Gravel Calculator in Tons

A gravel calculator in tons converts volume into estimated weight.

The general formula is:

Weight = Volume × Density

If density is expressed in pounds per cubic foot:

Tons = (Cubic Feet × Density) ÷ 2,000

because:

1 U.S. short ton = 2,000 pounds

Gravel density varies by material, particle size, moisture, and compaction, so the most accurate estimate uses the density provided by the supplier.

How Much Does a Cubic Yard of Gravel Weigh?

A cubic yard of gravel does not have one fixed weight.

Different gravel types can weigh different amounts depending on:

• Rock type
• Particle size
• Moisture content
• Compaction
• Amount of fine material

For planning purposes, many gravel products may weigh roughly around 1.2 to 1.5 tons per cubic yard, but this is only a general estimate.

For final ordering, use the supplier’s stated weight or density.

2 Cubic Yards of Gravel

The volume of 2 cubic yards of gravel equals:

2 × 27 = 54 cubic feet

The estimated weight depends on the material.

If gravel weighs approximately 1.4 tons per cubic yard, then:

2 × 1.4 = 2.8 tons

So 2 cubic yards of gravel might weigh about 2.8 tons under that assumption.

Actual weight can differ significantly, so verify your material’s density.

How Much Is a Ton of Gravel?

The question “how much is a ton of gravel” can mean either volume or price.

For more information about the formulas, unit conversions, assumptions, and rounding used across My Panda Tools, review our Calculation Methodology.

Volume

The volume represented by one ton of gravel depends on material density.

If gravel weighs approximately 1.4 tons per cubic yard:

1 ton ÷ 1.4 = approximately 0.71 cubic yards

This is only an example. Actual volume per ton varies by gravel type.

Price

The cost of a ton of gravel varies based on:

• Gravel type
• Rock size
• Region
• Supplier
• Delivery distance
• Quantity ordered
• Local market conditions

Because pricing changes by location and supplier, the calculator should focus primarily on quantity rather than displaying one fixed national price.

Cubic Yards to Tons of Gravel

To convert cubic yards into tons:

Formula

Tons = Cubic Yards × Tons Per Cubic Yard

Example:

3 cubic yards × 1.4 tons/cu yd = 4.2 tons

Estimated gravel weight:

4.2 tons

Again, use the actual supplier density when available.

Tons to Cubic Yards of Gravel

To convert tons back into cubic yards:

Cubic Yards = Tons ÷ Tons Per Cubic Yard

Example:

5 tons ÷ 1.4 tons/cu yd = 3.57 cubic yards

Estimated volume:

3.57 cubic yards

Gravel Driveway Calculator

A gravel driveway calculator can estimate the amount of gravel required for a rectangular driveway.

Suppose a driveway measures:

Length: 50 ft
Width: 12 ft
Depth: 4 in

Convert depth:

4 ÷ 12 = 0.333 ft

Volume:

50 × 12 × 0.333 = approximately 200 cubic feet

Convert to cubic yards:

200 ÷ 27 = approximately 7.41 cubic yards

If the material weighs about 1.4 tons per cubic yard:

7.41 × 1.4 = approximately 10.37 tons

Estimated requirement:

7.41 cubic yards or about 10.37 tons

This is a planning estimate only.

How Much Gravel Do I Need for a Driveway?

The amount of gravel required depends on:

• Driveway length
• Driveway width
• Gravel depth
• Number of layers
• Type of gravel
• Existing base
• Compaction requirements
• Ground conditions

A driveway may also use different materials for the base and surface layers, so a single gravel volume may not represent the full construction requirement.

For structural or permanent driveway installations, verify layer depth and material specifications with a local contractor or supplier.

Gravel Coverage by Depth

For 1 cubic yard of gravel, approximate area coverage is:

These figures assume an even layer and no compaction loss.

How Much Gravel Do I Need for 100 Square Feet?

For an area of 100 square feet:

At 2 Inches Deep

100 × 2 ÷ 324 = 0.62 cubic yards

At 3 Inches Deep

100 × 3 ÷ 324 = 0.93 cubic yards

At 4 Inches Deep

100 × 4 ÷ 324 = 1.23 cubic yards

The deeper the gravel layer, the more material you will need.

How Much Gravel Do I Need for 500 Square Feet?

For 500 square feet:

2-Inch Depth

500 × 2 ÷ 324 = 3.09 cubic yards

3-Inch Depth

500 × 3 ÷ 324 = 4.63 cubic yards

4-Inch Depth

500 × 4 ÷ 324 = 6.17 cubic yards

Use the appropriate depth based on the specific project.

Gravel for Paths and Landscaping

Gravel is commonly used for:

• Garden paths
• Walkways
• Decorative landscaping
• Drainage areas
• Patio bases
• Driveways
• Shed bases
• Around buildings or garden beds

Different projects may require different gravel sizes and depths.

If you are comparing gravel with organic ground cover for a landscaping project, use our Mulch Calculator to estimate the mulch volume required.

A decorative path may use a different layer thickness than a driveway or structural base.

How Much Extra Gravel Should You Order?

The calculator provides a theoretical volume based on your measurements.

Real projects may require additional material because of:

• Compaction
• Uneven ground
• Settlement
• Spillage
• Measurement differences
• Irregular edges

Instead of assuming one universal extra percentage, consider the material, project type, and supplier recommendations before ordering.

What Affects Gravel Weight?

Gravel Type

Dense crushed stone may weigh differently from lighter decorative gravel.

Moisture Content

Wet material generally weighs more than dry material.

Particle Size

Fine material can pack differently than larger stone.

Compaction

Compacted gravel occupies less volume than loose gravel.

Rock Composition

Different minerals and stone types have different densities.

This is why a ton of gravel should not automatically be treated as a fixed number of cubic yards.