What is Gravel Calculator?
A gravel calculator determines the total area, volume, weight in tons, and cost for a gravel project based on the dimensions of the area, gravel depth, type, and pricing. Whether you are covering a driveway, building a walkway, or landscaping a yard, this tool lets you enter the length, width, and depth of the area, choose a gravel type, set costs for material, delivery, labor, waste, and tax, and instantly see total tons needed, volume in cubic feet and yards, truck loads, and a detailed cost breakdown.
When to Use This Calculator
- You are resurfacing or building a new driveway and need a gravel estimate
- You are creating a garden walkway, path, or stepping-stone trail
- You need to calculate gravel for drainage projects like French drains
- You are comparing costs between different gravel types for a landscaping project
- You are ordering gravel from a supplier and need to know total tons and truck loads
- You want to budget the complete cost including material, delivery, labor, and tax
Steps:
- Enter the length of the area in feet or meters.
- Enter the width of the area in feet or meters.
- Enter the gravel depth in inches or centimeters.
- Select the gravel type: Pea Gravel, Crushed Stone, River Rock, Decomposed Granite, Recycled, or Base Gravel.
- Enter the cost per ton of gravel in your local currency.
- Enter delivery cost, labor cost per ft², waste percentage, and tax rate in the Cost Settings.
- View total tons, volume in cubic feet and yards, and number of truck loads required.
- Review the detailed cost breakdown including material, labor, delivery, waste, and tax.
Formula
Area (ft²) = length × width
Volume (ft³) = length × width × depth / 12
Volume (yd³) = volume (ft³) / 27
Weight (tons) = volume (ft³) × density / 2000
Gravel cost = weight (tons) × cost per ton
Waste cost = gravel cost × waste%
Material cost = gravel cost + waste cost
Labor cost = area (ft²) × labor cost per ft²
Delivery cost = flat delivery fee
Subtotal = material cost + labor cost + delivery cost
Tax = subtotal × tax%
Total cost = subtotal + tax
Cost per ft² = total cost / area
Truck loads = volume (yd³) / truck capacity (typically 10–14 yd³)
Use Cases
- Estimating gravel costs for resurfacing a residential driveway
- Calculating material needed for a garden walkway or path
- Planning gravel coverage for a parking area or turnaround
- Budgeting for drainage projects using gravel fill and French drains
- Comparing costs between different gravel types for landscaping
- Ordering the correct amount of gravel for a patio or courtyard
Key Benefits
- Supports six common gravel types with accurate density and coverage data
- Calculates total tons, volume in cubic feet and yards, and truck loads instantly
- Includes delivery cost, labor cost, waste factor, and sales tax in the total
- Supports both imperial (ft/in) and metric (m/cm) measurement systems
- Provides detailed cost breakdown with cost per square foot and per ton
- Helps avoid over-ordering or under-ordering gravel for any project size
Pro Tips
- Order 10–15% more gravel than your calculation to account for compaction, settling, and spreading waste
- For driveways, use a 4-inch compacted crushed stone base topped with 2 inches of finishing gravel
- Level and compact each layer before adding the next to prevent uneven settling and puddling
- Consider the color and texture of finishing gravel — it should complement your home and landscape design
- Get quotes from multiple suppliers — prices can vary significantly based on distance, quantity, and gravel type
Common Mistakes to Avoid
- Not accounting for compaction — gravel settles 15–25% in the first year, so order extra material
- Using too thin a layer — gravel less than 2 inches deep will shift and expose the underlying soil
- Skipping the base layer — always install compacted base gravel before adding the finishing layer
- Forgetting delivery access — dump trucks need 10–12 ft wide clear path to dump material on-site
- Ignoring waste percentage — cutting, spreading, and edge waste typically add 10–15% to the total needed
Key Terms Explained
- Cubic Yard (yd³)
- A volume measurement equal to 27 cubic feet (3 ft × 3 ft × 3 ft). Gravel is typically sold and delivered by the cubic yard.
- Density
- The weight of gravel per unit of volume, measured in tons per cubic yard. Different gravel types have different densities, affecting total weight and cost.
- Base Gravel
- A coarse, angular stone used as a foundation layer under driveways, walkways, and patios. It compacts well and provides structural support.
- Compaction
- The process of compressing gravel to remove air gaps and create a firm, stable surface. Compacted gravel is denser and more durable.
- Finishing Gravel
- The visible top layer of gravel placed over the base layer. Includes pea gravel, river rock, and decorative stone for aesthetics and drainage.
- Waste Factor
- A percentage added to the material order to account for spreading loss, edge trimming, cutting waste, and settling. Standard is 10–15% for most projects.
- Coverage Rate
- The amount of area one ton of gravel covers at a given depth. Varies by gravel type and depth — typically 80–100 ft² per ton at 2 inches.
- Truck Load
- The volume of gravel delivered by a single dump truck, typically 10–14 cubic yards (270–378 ft³). Used to estimate delivery requirements and costs.
Related Concepts
- Concrete Calculator — Calculate concrete volume, bags, and cost for slabs, footings, and driveways.
- Paver Calculator — Calculate the number of pavers, sand, and base material needed for a patio or walkway.
Example
A 20 ft × 10 ft driveway with 4 inches of pea gravel: Area = 20 × 10 = 200 ft². Volume = 200 × 4 / 12 = 66.67 ft³ = 2.47 yd³. Weight = 66.67 × 1.4 / 2000 × 2000 = 4.67 tons. At $30/ton = $140.00. Waste 10% = $14.00. Labor $2/ft² = $400.00. Delivery $100. Tax 8% = $51.52. Total = $695.52 ($3.48/ft², 1 truck load).