Stone Tonnage Calculator & Gravel Tool
Estimate gravel, crushed stone, limestone, river rock, and base material in tons, cubic yards, cost, and supplier-ready order quantities.
Project section
Add sections for driveways, beds, paths, or trenches before calculating a combined order.
Live planning checks
Coverage preview uses the selected density and depth before waste. Exact yield changes with moisture, compaction, stone size, and grading.
Order estimate
Method & Assumptions
Calculated based on volume = area x depth, cubic yards = cubic feet / 27, and tons = cubic yards x material density. Order quantity is rounded upward using your selected supplier increment.
Density presets reflect common published estimating ranges checked against current gravel calculator references such as NicheCalc and LandscapeCalculator.net. Best used for planning and supplier conversations; your local quarry or yard ticket should override any default density.
Privacy First
No data is sent to our servers. All calculations are performed locally in your browser.
Limitation: stone tonnage changes with moisture, compaction, gradation, and exact aggregate type. For structural bases, drainage systems, or engineered fill, confirm required depth, compaction, and aggregate specification before ordering.
How to Use
Follow the same flow a supplier quote needs: measure the space, choose the stone, add real-world allowance, then copy the final order note.
Choose the shape that matches the job, then add length, width, diameter, trench size, or known square footage.
Select a stone preset such as crushed stone, pea gravel, limestone, or enter a custom density in tons/yd3.
Set depth, waste, compaction, price, and rounding so the estimate becomes practical for ordering, not just measuring.
Review tons, cubic yards, cost, and delivery loads, then copy the supplier note for a quote or material order.
For best accuracy, confirm the supplier’s material density and add a waste allowance for compaction, uneven grade, moisture, and spreading loss.
Plan the Order, Not Just the Math
A stone tonnage calculator is most useful after it turns field measurements into a quantity your supplier can actually quote: cubic yards, tons, waste allowance, and a rounded order amount. The key is using the right depth and density for the material, then adding a practical buffer for grading, compaction, and spreading loss.
Driveways, paths, beds, and drains
Use the calculator for gravel driveways, crushed stone bases, pea gravel paths, river rock beds, limestone cover, and French drain fill. Recalculate if the project has separate layers with different depths.
Depth changes everything
Depth is a direct multiplier. A 400 sq ft area at 4 inches uses twice as much material as the same area at 2 inches, before any waste or compaction allowance is added.
How the Stone Tonnage Formula Works
The calculation starts with geometry, then converts volume to weight. For rectangular areas, the shortcut is cubic yards = length in feet × width in feet × depth in inches ÷ 324. The divisor comes from converting inches to feet and cubic feet to cubic yards; NIST Handbook 44 lists 27 cubic feet in one cubic yard.
Tons = cubic yards × density tons/yd3
Order tons = tons × (1 + waste %)
For circular areas, trenches, and known square footage, the same volume-first logic applies: calculate cubic feet, divide by 27, then multiply by the material density.
Depth, Density, and Stone Type Matter
Most ranking gravel calculators answer “how much gravel do I need,” but the better question is “which estimate should I trust for this material?” Rounded pea gravel, crushed stone, crusher run, limestone, and river rock can have different weight per cubic yard, especially when moisture and fines are involved.
Decorative gravel and beds
Use shallow depths such as 2 to 3 inches for landscape coverage when the goal is appearance and weed suppression, not structural support.
Driveway and base stone
Use deeper layers for compacted bases. A top layer may be calculated separately from crusher run or dense-grade aggregate beneath it.
Drainage stone
French drains and drainage trenches often use clean angular stone. Confirm the trench depth, pipe bedding, fabric wrap, and final cover before ordering.
Stone size specification
Names such as No. 57 stone and No. 8 stone relate to aggregate size classifications. ASTM D448 is a common reference for coarse aggregate size designations used in road and bridge construction.
What Can Change the Final Tonnage?
A crushed stone calculator gives a planning estimate, not a quarry scale ticket. The U.S. Geological Survey describes crushed stone as a major construction aggregate, and real aggregate products vary by geology, gradation, moisture, and processing method. For broader material context, see the USGS crushed stone information.
- Compaction can reduce installed thickness, especially for crusher run and dense-graded base.
- Uneven grade, soft spots, and edge loss can require more material than a clean rectangle suggests.
- Supplier density may differ from a default calculator preset, so use local yard data when available.
- Delivery minimums and truck capacity may force the rounded order above the exact calculated tons.
What to Do After You Calculate
After using the stone calculator, compare the result against how your supplier sells material. Some yards quote by the ton, others by cubic yard, and many round delivery orders to half-ton, full-ton, or truckload increments.
Ask for the material by name
Bring the supplier note with the material type, tons, cubic yards, target depth, and waste allowance. This helps prevent mixing up decorative gravel, road base, and drainage stone.
Recheck multi-layer projects
For driveways, patios, and compacted bases, calculate each layer separately. A 6-inch base and 2-inch top layer usually use different materials and densities.
Stone Tonnage Calculator FAQ
What does a stone tonnage calculator do?
It converts project measurements into cubic yards and tons so you can estimate how much gravel, crushed stone, limestone, river rock, or base material to order. A useful calculator also accounts for depth, density, waste, cost, and supplier rounding.
How do you calculate stone tons from cubic yards?
Multiply cubic yards by the material density in tons per cubic yard. For example, if a stone weighs 1.35 tons per cubic yard and the project needs 3 cubic yards, the estimate is 4.05 tons before waste or compaction allowance.
How many cubic yards are in one ton of gravel?
It depends on density. If gravel weighs 1.35 tons per cubic yard, then 1 ton covers about 0.74 cubic yards. Heavier limestone or dense crushed stone may produce fewer cubic yards per ton.
How much extra stone should I order?
For most DIY gravel and stone jobs, add about 10% for uneven grade, spreading loss, and compaction. Use a higher allowance for irregular areas, soft subgrade, deep base layers, or projects where running short would delay installation.
Which input affects the estimate the most?
Depth usually has the biggest practical impact because it multiplies the entire area. Density is the next major variable when converting cubic yards to tons, especially when comparing pea gravel, crusher run, river rock, and limestone.
Is crushed stone the same as gravel?
Not exactly. Crushed stone is mechanically broken and often more angular, while natural gravel is typically rounded. Both may be sold for driveways, beds, paths, and drainage, but they can compact and weigh differently.
Can I use the calculator for a French drain?
Yes, use the trench mode or calculate length × width × depth. For drainage work, confirm the required stone size, pipe diameter, fabric wrap, and final cover depth before ordering.