🌳 LANDSCAPING

Gravel Calculator

Find out how much gravel, crushed stone, or aggregate you need for driveways, paths, or drainage projects.

Area Size

Length

Width

Depth

Material Type (for weight)

Typical Coverage

1 cubic yard ≈ 108 sq ft at 3″ depth Most common depth for paths and light landscaping

Estimated Gravel Needed

0 cubic yards

How to Use the Gravel Calculator

This gravel calculator helps you estimate the volume (and approximate weight) of gravel, crushed stone, or aggregate needed for rectangular areas such as driveways, walkways, or drainage beds.

Measure the length Measure the longest side of the area. Enter the value in feet or meters.

Measure the width Measure the shorter side. Use the same unit system you selected.

Choose the depth Typical depths: 2–3 inches for paths, 4–6 inches for driveways, and 6–12 inches for drainage or base layers.

Select material type (optional) This adjusts the estimated weight in tons. Choose “Volume only” if you just need cubic yards.

Get your estimate Click the button to see cubic yards and approximate tons required.

What Measurements Do You Need?

Only three measurements are required for an accurate estimate:

Length The longer side of the area.

Width The shorter side of the area.

Depth How thick the gravel layer should be.

How the Gravel Calculation Works

The calculator multiplies length × width to get the surface area, then multiplies by the depth (converted to feet or meters) to produce volume in cubic feet. That volume is divided by 27 to convert to cubic yards — the unit most suppliers use. An optional density factor converts the volume into approximate tons.

Gravel Formula Volume (cu yd) = (Length × Width × Depth in feet) ÷ 27
Weight (tons) ≈ Volume × Density factor (usually 1.3–1.5)

💡 Keep in mind

This is a reliable estimate. Actual needs can vary due to compaction, uneven ground, and the specific type of aggregate. Most contractors recommend ordering 5–10% extra to account for settling and waste.

Gravel Coverage Guide

Coverage depends on the depth you choose. These are the most useful planning numbers:

2 inches deep 1 cubic yard covers about 162 sq ft

3 inches deep 1 cubic yard covers about 108 sq ft

4 inches deep 1 cubic yard covers about 81 sq ft

Always confirm with your supplier — actual coverage can vary slightly by stone size and how the material is compacted.

What Can Affect How Much Gravel You Need?

Several real-world factors influence the final quantity:

🪨 Stone Size Larger stones leave more voids and may require slightly more material.

🚚 Compaction Driveways need heavier compaction, which reduces volume after installation.

🌧️ Settling Fresh gravel settles after the first few rains or heavy use.

📐 Base Layer Many projects require a separate compacted base that is not included in the surface gravel calculation.

Gravel Calculator FAQ

How much gravel do I need for a 20 × 10 driveway?

At a typical 4-inch depth you will need approximately 2.5 cubic yards (around 3.5 tons of standard crushed stone). Enter your exact dimensions above for a precise figure.

How many square feet does one cubic yard of gravel cover?

At 3 inches deep, one cubic yard covers about 108 square feet. At 4 inches it covers roughly 81 square feet.

How many tons are in a cubic yard of gravel?

Most crushed stone and gravel weighs between 1.3 and 1.5 tons per cubic yard. The calculator uses a common average of 1.4 tons unless you select a different material type.

Should I buy by the cubic yard or by the ton?

Suppliers usually sell bulk gravel by the cubic yard or by the ton. Use the calculator’s weight estimate so you can compare prices accurately.

Is 3 inches of gravel enough for a driveway?

Three inches works for light traffic or decorative areas. Most residential driveways perform better with 4–6 inches of surface gravel over a compacted base.