Gravel Calculator
Quickly determine the exact amount of gravel, crushed stone, or sand required for your driveway, path, or patio project. This professional-grade calculator provides instant volume and weight estimates to ensure you order the right amount of material.
Why use this Gravel Calculator?
Whether you are a homeowner or a landscape contractor, ordering bulk materials like stone and gravel involves complex conversions. This tool eliminates the risk of ordering too little, which halts work, or too much, which wastes money. We designed this specific calculator to bridge the gap between project measurements in feet and supplier orders in tons or cubic yards.
Practical Real-World Use Cases
- Driveway Resurfacing: Calculate the amount of #57 crushed stone needed to fill potholes and provide a stable 4-inch driving surface.
- Landscape Drainage: Estimate the volume of washed clean stone required for a French drain or a foundation drainage field.
- Decorative Paths: Determine how many bags or cubic yards of pea gravel are needed for a 2-inch deep garden walkway.
- Shed Foundations: Calculate the sub-base material required for a level 6-inch gravel pad for outdoor structures.
How the Calculator Works
The tool first computes the total volume of your project space by multiplying your surface area by the desired depth. Because suppliers use different units, the calculator then applies the specific density of your selected material, such as standard gravel or wet sand, to provide weight in US Tons and volume in Cubic Yards. This ensures your order matches the exact terminology used by local quarries and supply yards.
Guide to Gravel Calculations
To find the amount of gravel needed, you must calculate the volume of the area to be filled. The basic formula is:
Volume = Length × Width × Depth
- Step 1 (Area): Calculate square footage (Length × Width).
- Step 2 (Volume): Convert your depth to feet (Divide inches by 12). Multiply Area by Depth to get Cubic Feet.
- Step 3 (Cubic Yards): Divide Cubic Feet by 27.
- Step 4 (Tons): Multiply Cubic Yards by the material density (typically 1.4 tons per yard).
Recommended Depth Guide
| Project Type | Recommended Depth | Recommended Material |
|---|---|---|
| Walking Paths | 2 - 3 inches | Pea Gravel, Crushed Stone (1/4") |
| Standard Driveway | 4 - 6 inches | Crushed Stone #57, Driveway Gravel |
| Heavy Vehicle Driveway | 6 - 8 inches | Coarse Aggregate Base + Top Layer |
| Landscaping / Mulch | 2 - 3 inches | River Rock, Decorative Chips |
Common Material Densities
- Pea Gravel: Small, rounded stones. Density: 100-110 lbs/ft³.
- Crushed Stone (#57): Angular edges that lock together. Density: 105 lbs/ft³.
- Dry Sand: Fine particles. Density: 100 lbs/ft³.
- Wet Sand: Much heavier due to moisture. Density: ~120 lbs/ft³.
Accuracy & Limitations
Please note that weight estimates are based on industry-standard densities. Factors such as moisture content, stone size variability, and compaction, also known as settling, can affect the final amount needed. We recommend ordering an extra 10% of material to account for compaction and delivery spills.
Frequently Asked Questions (FAQ)
How much does a yard of gravel cover?
One cubic yard of gravel covers approximately 324 square feet at a depth of 1 inch. For a standard 3-inch depth, one yard covers roughly 108 square feet.
How many tons are in a cubic yard?
On average, a cubic yard of standard gravel weighs about 1.4 tons (2,800 lbs). This varies based on the type of stone and how wet it is at the time of weighing.
What is the best gravel for a driveway?
#57 Crushed Stone is preferred because its jagged edges interlock, creating a stable surface that won't shift as much as rounded river rocks under vehicle tires.
Can I use this for sand or mulch?
Yes, you can use the "Custom Density" option or the sand presets. For mulch, use the volume results in cubic yards, as mulch is rarely sold by weight.
Do I need to compact the gravel?
For driveways and foundations, compaction is essential. Remember that compacting the material will reduce its volume, meaning you may need slightly more than the raw calculation suggests.