Gravel Calculator

Introduction

The Gravel Calculator helps you figure out how much gravel you need for your project. Whether you are filling a driveway, building a path, or laying a foundation, this tool makes it easy to get the right amount. Just enter the length, width, and depth of the area you want to cover, and the calculator will tell you how many tons or cubic yards of gravel to buy. Getting the right amount saves you money and avoids extra trips to the supply yard. No more guessing — use this gravel calculator to plan your next project with confidence.

How to Use Our Gravel Calculator

Enter the dimensions of your project area and the type of gravel you need. This calculator will tell you how much gravel to buy in both volume and weight.

Length: Enter the length of the area you need to cover with gravel. You can use feet, inches, yards, or meters. If you need help determining the total area, our Square Footage Calculator can assist with that step.

Width: Enter the width of the area you need to cover. Use the same unit of measurement as the length.

Depth: Enter how deep you want the gravel layer to be. Most driveways need about 2 to 4 inches of gravel, while a base layer may need 4 to 6 inches or more.

Gravel Type: Pick the type of gravel you plan to use. Different types of gravel have different weights per cubic foot, so this choice affects how many tons you need to order. For specific gravel types, you can also try our Pea Gravel Calculator or River Rock Calculator.

Price Per Unit (optional): If you know the cost of gravel from your supplier, enter the price per ton or per cubic yard. The calculator will estimate your total material cost.

Gravel Calculator

A gravel calculator helps you figure out how much gravel you need for a project. Whether you are filling a driveway, building a patio base, or laying a garden path, knowing the right amount of gravel saves you time and money. Ordering too little means extra trips to the supply store. Ordering too much means wasted material and higher costs.

How Gravel Is Measured

Gravel is usually sold by the cubic yard or by the ton. To find out how much you need, you measure three things: the length, width, and depth of the area you want to cover. These measurements are multiplied together to get the total volume. That volume is then converted into cubic yards or tons depending on how your supplier sells it.

Common Types of Gravel

Not all gravel is the same. Here are some common types used in construction:

• Pea gravel – Small, rounded stones great for walkways and drainage. Use our Pea Gravel Calculator for precise estimates on this specific material.
• Crushed stone – Angular pieces that pack tightly, ideal for driveways and base layers.
• River rock – Smooth, decorative stones used in landscaping. Our River Rock Calculator can help you estimate the right amount.
• Crushed gravel (Class 5) – A mix of crushed stone and fine particles, perfect for road bases.

Gravel Weight

One cubic yard of gravel typically weighs between 2,400 and 2,900 pounds (about 1.2 to 1.45 tons), depending on the type and moisture content. Dry gravel is lighter than wet gravel. Crushed stone tends to be heavier than pea gravel because its angular shape allows the pieces to pack more closely together.

How Deep Should Gravel Be?

The right depth depends on your project:

• Driveways: 4 to 6 inches
• Walkways: 2 to 3 inches
• Patio bases: 4 to 6 inches
• Decorative ground cover: 2 inches

Using the correct depth ensures your gravel layer is strong enough to handle foot traffic or vehicle weight without shifting or wearing away too quickly.

Tips for Ordering Gravel

It is a good idea to order about 10% more gravel than your calculated amount. This accounts for uneven ground, compaction, and spillage during delivery. Gravel compacts down after it is spread and packed, so a little extra goes a long way toward making sure your project is fully covered. If your project also involves other materials, consider using our Sand Calculator, Concrete Calculator, or Topsoil Calculator to estimate everything you need. For paving projects, our Asphalt Calculator can also be helpful. And if you are planning landscaping around your gravel area, our Mulch Calculator can help you determine the right amount of mulch for garden beds and borders.

Frequently Asked Questions

How much gravel do I need for a 10x10 area?

For a 10 ft × 10 ft area at 3 inches deep, you need about 0.93 cubic yards or roughly 1.25 tons of standard gravel. Adjust the depth based on your project — driveways need 4 to 6 inches, while walkways only need 2 to 3 inches.

How do I calculate gravel for a circular area?

Click the Circle tab in the calculator and enter the diameter of your circle. Then enter the depth. The calculator uses the formula π × radius² × depth to find the volume automatically. This is great for fire pits, round patios, or tree rings.

What is the difference between volume and weight when ordering gravel?

Volume measures how much space the gravel fills (cubic yards or cubic feet). Weight measures how heavy it is (tons or pounds). Some suppliers sell by volume and others by weight. This calculator gives you both so you can order correctly no matter how your supplier sells it.

Why does the calculator ask for a material type?

Different gravel types weigh different amounts per cubic foot. For example, pea gravel weighs about 96 lb/ft³ while gravel mixed with sand weighs about 120 lb/ft³. Picking the right material gives you an accurate weight estimate so you order the correct number of tons.

What does the overage percentage do?

The overage percentage adds extra gravel to your estimate to account for spillage, uneven ground, and natural settling. A 10% overage is standard for most projects. This helps make sure you don't run short during installation.

When should I enable the compaction adjustment?

Enable compaction when your gravel will be packed down with a compactor or heavy equipment. This is common for driveways, parking areas, and road bases. Gravel can lose up to 30% of its volume when compacted, so you need to order more to reach your desired finished depth.

Can I enter my own custom gravel density?

Yes. Select Custom from the Material Type dropdown. A new field will appear where you can type your own density in lb/ft³, kg/m³, or g/cm³. This is useful if your supplier gives you a specific density for their product.

How do I switch the results to metric units?

Click the Metric button below the result cards. The calculator will show volume in cubic meters and weight in kilograms instead of cubic yards and tons.

What if I already know the volume I need?

Click the Volume tab and enter your known volume in cubic feet, cubic yards, cubic meters, or liters. The calculator will skip the area and depth steps and go straight to calculating weight and cost.

How much does a cubic yard of gravel cost?

Gravel prices vary by location and type, but most standard gravel costs between $30 and $75 per cubic yard. Specialty or decorative gravel can cost more. Enter your supplier's price in the Price per Unit field to get an accurate cost estimate for your project.

How many tons is 1 cubic yard of gravel?

One cubic yard of standard gravel weighs about 1.35 tons (2,700 lb). This varies by type — pea gravel is about 1.30 tons per cubic yard, while gravel with sand can be around 1.62 tons per cubic yard.

Can I use this calculator for sand or topsoil?

Yes. The Material Type dropdown includes options for dry sand, wet sand, and topsoil. Select the material you need and the calculator will use the correct density to estimate volume, weight, and cost.

How do I calculate gravel if my area is not a rectangle?

If your area is an odd shape, break it into smaller rectangles or circles. Calculate each section separately using the appropriate tab, then add the results together. You can also use the Area tab if you already know the total square footage of your irregular shape.

What does the estimated cost include?

The estimated cost only covers the price of the gravel material itself. It does not include delivery fees, labor, equipment rental, or taxes. Contact your supplier for a full quote that includes these extras.

How accurate is this gravel calculator?

The calculator gives a close estimate based on standard material densities and the dimensions you enter. Real-world results can vary slightly due to moisture content, gravel shape, ground conditions, and how tightly the material is packed. Adding 10% overage helps cover these differences.