What Is a Gravel Calculator and Why Do You Need One for Your Next Project?
Gravel is one of the most versatile and affordable construction materials available. Whether you are building a driveway, laying a patio base, installing a French drain, or creating a garden path, you need to know exactly how much gravel to order. Order too little and you face a second delivery charge. Order too much and you pay for material you do not need. A gravel calculator eliminates the guesswork by computing the exact volume and weight required for your project.
In 2026, gravel prices range from $10 to $50 per ton or $15 to $75 per cubic yard, depending on the type and your location. A typical 2-car driveway (24 by 24 feet) requires about 21.3 cubic yards, costing $600 to $1,800 installed. Getting the quantity right saves money and prevents project delays. For calculating the area of irregularly shaped projects, pair this with our Square Footage Calculator.
What This Calculator Does
Enter the dimensions of your project area (length, width, and desired depth) and select your gravel type. The calculator computes the volume in cubic yards and cubic feet, estimates the weight in tons, and tells you how many bags you would need if purchasing from a home center. For converting between metric and imperial units, use our Unit Converter.
Inputs Required
- Length and Width (ft): The dimensions of the area to be covered
- Depth (inches): How deep the gravel layer will be
- Gravel Type: Material type affecting weight per cubic yard
Outputs Provided
- Cubic Yards: Volume for bulk orders
- Cubic Feet: Total volume in cubic feet
- Weight (lbs and tons): Estimated material weight for delivery planning
- 50 lb Bags: Bag count for small projects purchased at hardware stores
How the Calculation Works
Volume is calculated by multiplying the area by the depth (converted to feet). The weight is then estimated by multiplying the volume by the gravel's density. Different gravel types have different densities, which is why the calculator accounts for material type.
Area (sq ft) = Length x Width
Volume (ft³) = Area x (Depth in inches / 12)
Cubic Yards = Volume / 27
Weight (lbs) = Cubic Yards x Density (lbs/yd³)
Tons = Weight (lbs) / 2000
Typical gravel densities range from about 1,300 lbs per cubic yard for lightweight lava rock to 2,700 lbs per cubic yard for dense crushed granite. Pea gravel and river rock are approximately 2,600 lbs per cubic yard. These are estimates; actual density varies by source and moisture content.
How to Use the Calculator
- Select the shape of the area to be covered
- Enter the length and width in feet (or diameter for circular areas)
- Select the desired gravel depth from the dropdown
- Choose the gravel type you plan to use
- Click Calculate to see volume and weight estimates
- Use the cubic yards figure when ordering from a bulk supplier, and the tons figure for weight-based orders
Example Calculations
Example 1: Two-Car Gravel Driveway
Mark, a homeowner in Ohio, wants to install a 24 by 24 foot gravel driveway at 4 inches deep using crushed stone #57:
- Area: 24 x 24 = 576 square feet
- Volume: 576 x (4/12) = 192 cubic feet
- Cubic Yards: 192 / 27 = 7.1 cubic yards
- Weight: 7.1 x 1.4 = 9.9 tons
- Estimated Cost: 9.9 tons x $35/ton = $346.50 (material only)
Mark adds 10% for compaction and waste, ordering 7.8 cubic yards (about 11 tons). With delivery at $75, his total material cost is approximately $420.
Example 2: French Drain Installation
Lisa, a homeowner in Oregon, is installing a 50-foot French drain that is 1 foot wide and 1.5 feet deep, using washed river rock:
- Volume: 50 x 1 x 1.5 = 75 cubic feet
- Cubic Yards: 75 / 27 = 2.8 cubic yards
- Weight: 2.8 x 1.4 = 3.9 tons
- Estimated Cost: 3.9 tons x $55/ton = $214.50 (material only)
Lisa orders 3 cubic yards to account for the pipe volume that displaces some gravel. Her total with delivery comes to about $290.
Real-World Scenarios
Driveway Installation on a Budget
Carlos, a homeowner in Texas, wants to build a 100-foot by 10-foot gravel driveway. Using crusher run at $25 per ton, he calculates 12.3 cubic yards at 4 inches deep, which is about 17.2 tons. Adding 15% for compaction brings the order to 20 tons. His material cost is $500, plus $75 delivery, totaling $575. A paved driveway of the same size would cost $4,000 to $10,000. The gravel option saves him thousands while providing a durable surface that is easy to maintain and repair.
Landscaping Project With Multiple Gravel Types
Jennifer, a homeowner in Colorado, is designing a backyard with three zones: a 10 by 20 foot pea gravel patio (3 inches deep), a 4 by 20 foot river rock walkway (2 inches deep), and a 6 by 8 foot decomposed granite fire pit area (4 inches deep). She uses the calculator for each zone separately. The patio needs 1.85 cubic yards of pea gravel ($110), the walkway needs 0.5 cubic yards of river rock ($80), and the fire pit area needs 0.9 cubic yards of decomposed granite ($65). Her total material cost is $255, plus one delivery charge.
Bulk vs Bag Cost Comparison
Tom, a DIYer in Georgia, needs 2 cubic yards of #57 crushed stone for a shed base. His local supplier charges $40 per cubic yard in bulk ($80 total) plus $50 delivery, totaling $130. The same volume in 0.5 cubic foot bags at Home Depot costs $6 per bag. That is 108 bags at $6 each = $648. Bulk saves him $518, a savings of 80%. For any project over 1 cubic yard, bulk delivery is almost always the better choice. For smaller projects under 0.5 cubic yards, bags are more practical.
Why Volume and Weight Matter
Gravel is sold by the ton, cubic yard, or bag. Knowing both volume and weight lets you compare prices across suppliers who quote in different units. In 2026, bulk gravel costs $15 to $75 per cubic yard or $10 to $50 per ton. One cubic yard contains approximately 1.4 to 1.5 tons of gravel, depending on the stone type. A cubic yard covers about 108 square feet at 3 inches deep. A ton covers approximately 77 square feet at 3 inches deep. For estimating project costs, also try our Concrete Calculator for projects that need a solid base.
Common Mistakes to Avoid
- Underestimating depth: Driveways need 4 to 6 inches of gravel. Walkways need 2 to 3 inches. French drains need enough to surround the pipe completely. Too shallow and the gravel shifts and erodes. Too deep and you waste money
- Not accounting for compaction: Crusher run and other dense-graded materials compact by about 25%. Order 25% more than the finished volume. Clean stone like #57 and pea gravel do not compact, so no extra is needed
- Ignoring waste: Add 5 to 10% for spillage, uneven spreading, and settling. This is separate from compaction. A 10% waste factor on a 10-cubic-yard order means ordering 11 cubic yards
- Using the wrong density: Different gravel types have different weights per cubic yard. Crushed stone is about 1.4 tons per cubic yard, dry sand is 1.35, and riprap is 1.85. Using a single density for all materials leads to inaccurate ton estimates
- Forgetting delivery costs: Delivery adds $50 to $150 per trip, often with a 5 to 10 ton minimum. Factor this into your total project cost. Some suppliers charge per ton for delivery ($10 to $25 per ton) rather than a flat fee
- Buying bags for large projects: Bagged gravel from home centers costs $200 to $400 per cubic yard, compared to $25 to $60 per cubic yard in bulk. For any project over 1 cubic yard, bulk delivery saves 70 to 85%
Limitations of This Calculator
This calculator uses standard density values for common gravel types. Actual density varies by supplier, moisture content, and stone gradation. Wet gravel weighs more than dry gravel. The calculator does not account for sub-base preparation, geotextile fabric, edging, or labor costs. It assumes a rectangular area. For irregular shapes, break the project into rectangles and calculate each separately. Prices shown are 2026 national averages and vary significantly by region. Always confirm current pricing with your local supplier.
Authoritative Research and Resources
- USGS: Sand and Gravel Statistics and Information - The United States Geological Survey provides production data, pricing trends, and consumption statistics for construction sand and gravel. The USGS reports that national production was approximately 890 million tons in 2026, an 8% decrease from prior years due to reduced residential housing demand.
- HomeGuide: Gravel Prices (2026) - Comprehensive 2026 pricing guide covering gravel costs per ton, per cubic yard, per square foot, and per truck load. Includes cost breakdowns by project type (driveway, walkway, patio, French drain) and by gravel type (crusher run, #57 stone, pea gravel, river rock).
- NRMCA: National Ready Mixed Concrete Association - Industry association providing guidance on aggregate materials, base preparation, and construction standards for projects that combine gravel bases with concrete surfaces.