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Practical note--
Gravel Calculator
Use this gravel calculator to estimate cubic yards, tons, waste, and project cost before ordering stone for a driveway, walkway, drainage run, shed pad, or landscape bed.
How to use this calculator
- Measure the project length and width.
- Choose a depth based on the job: shallow for paths, deeper for driveways and drainage.
- Use the gravel supplier density if you have it. If not, 1.5 tons per cubic yard is a practical default.
- Add waste before ordering so compaction, uneven ground, and rounding do not leave you short.
Gravel formula
Cubic feet = length × width × depth
Cubic yards = cubic feet ÷ 27
Tons = cubic yards × tons per cubic yard
Tons with waste = tons × (1 + waste percentage)
Depth must be converted to feet before multiplying. For example, 4 inches is 0.333 feet.
Worked example
A 40 ft by 10 ft driveway section at 4 inches deep is 133.3 cubic feet. Divide by 27 to get 4.94 cubic yards. At 1.5 tons per cubic yard, that is about 7.41 tons before waste. With 10% extra, order about 8.15 tons.
Practical gravel planning guide
Gravel jobs fail most often because the depth is too shallow, the base is soft, or the wrong stone is used. Driveways need a compacted base and enough depth to resist rutting. Drainage projects need clean stone with room for water to move. Decorative paths can use smaller stone, but loose rounded gravel moves more under foot and tires.
| Project | Common depth | Planning note |
|---|---|---|
| Walkways | 2-4 in | Use landscape fabric and edging for cleaner edges. |
| Patios or shed pads | 4-6 in | Compact the base before setting blocks or skids. |
| Gravel driveways | 6-12 in | Use layers for weak soil or regular vehicle traffic. |
| Drainage areas | 6-12 in | Use clean stone and maintain slope away from structures. |
Common gravel project mistakes
- Using decorative pea gravel where compacted crushed stone is needed.
- Forgetting that depth must be converted from inches to feet.
- Ordering exactly the calculated amount with no waste margin.
- Ignoring soft subgrade, drainage fabric, edging, or compaction.
- Comparing supplier prices without checking whether they quote by ton or cubic yard.
FAQ
Gravel calculator questions
How much gravel do I need for a driveway?
Multiply length by width by depth to get cubic feet, divide by 27 for cubic yards, then multiply by the gravel density. Driveways commonly need deeper gravel than paths because vehicles rut shallow material.
What gravel depth should I use?
Walkways often use 2 to 4 inches, patios and shed pads often use 4 to 6 inches, and driveways commonly use 6 to 12 inches depending on traffic, soil, and base layers.
How many tons are in a cubic yard of gravel?
A practical planning number is about 1.5 tons per cubic yard. Some products are lighter or heavier, so check the supplier density when ordering.
Should I add extra gravel?
Yes. Add 5 to 15 percent for compaction, uneven ground, spillage, and supplier rounding. Deeper driveways and rough sites usually need more buffer.
Is gravel sold by ton or cubic yard?
Both are common. Landscape yards may quote by cubic yard, while aggregate suppliers often quote by ton. This calculator shows both.
What is the best gravel for drainage?
Clean angular stone such as #57 stone is commonly used for drainage because it leaves void space for water. Avoid stone with many fines when drainage is the main goal.
Image and Pinterest plan
Practical diagram
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Alt: Diagram showing recommended gravel depths for walkways, driveways, and drainage projects.
Reference chart
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Alt: Gravel conversion chart showing cubic yards, tons, and common density assumptions.
Pinterest pin
how-much-gravel-do-i-need-pin.png
Pin description: Estimate gravel tons and cubic yards before ordering driveway or landscape stone.
Gravel planning overview
This gravel calculator estimates cubic feet, cubic yards, tons, waste, and cost for driveways, walkways, drainage runs, shed pads, and landscape beds. It helps property owners compare supplier quotes, decide whether a truck delivery makes sense, and avoid ordering too little stone for a base or drainage job.
The result supports both quantity and project decisions. A driveway needs enough depth and compaction to resist rutting. A drainage trench needs clean stone that leaves room for water. A decorative bed may care more about coverage and edge cleanup than structural depth.
Inputs explained
Length and width describe the footprint. Depth is the layer thickness and should match the job. Density converts cubic yards to tons because many aggregate suppliers sell by weight. Waste covers compaction, uneven soil, edge loss, low spots, and delivery rounding. Price per ton creates a rough budget before delivery fees.
Formula or method
Cubic feet = length x width x depth.
Cubic yards = cubic feet divided by 27.
Tons = cubic yards x tons per cubic yard.
Tons with waste = tons x (1 + waste percent).
Depth must be converted to feet before multiplying. Four inches is 0.333 feet. Density varies by product, moisture, and gradation, so supplier density is better than a generic value when available.
Worked example
A 40 ft by 10 ft driveway area at 4 inches deep is 133.3 cubic feet. Divide by 27 to get 4.94 cubic yards. At 1.5 tons per cubic yard, that is about 7.41 tons before waste. With 10 percent extra, order about 8.15 tons, then round according to supplier minimums.
How to interpret the result
Round up modestly when the site is rough, the stone will be compacted, or the supplier delivers by truck scale. Confirm stone type, base preparation, drainage fabric, slope, delivery access, and local runoff rules before starting work that affects drainage, foundations, or vehicle access.
Common mistakes
- Using decorative pea gravel where compacted crushed stone is needed.
- Forgetting that depth must be converted from inches to feet.
- Ordering exactly the calculated amount with no waste margin.
- Ignoring soft subgrade, drainage fabric, edging, or compaction.
- Comparing supplier prices without checking whether they quote by ton or cubic yard.
Trust and disclaimer note
This is a home material estimate, not professional advice. Confirm product density, compaction needs, drainage requirements, supplier units, contractor guidance, and local code where needed.
FAQ
Gravel calculator questions
How much gravel do I need for a driveway?
Multiply length by width by depth, convert to cubic yards, then multiply by density. Driveways usually need deeper layers than decorative paths.
What gravel depth should I use?
Walkways often use 2 to 4 inches, shed pads often use 4 to 6 inches, and driveways often use 6 to 12 inches depending on soil and traffic.
How many tons are in a cubic yard?
A common planning value is about 1.5 tons per cubic yard, but supplier density is better when available.
Should I add extra gravel?
Yes. Add extra for compaction, low spots, edge loss, and supplier rounding.
Is gravel sold by ton or yard?
Both are common. The calculator shows both so you can compare supplier quotes.
Realistic gravel examples
Driveway top layer
A 60 ft by 12 ft driveway top layer at 3 inches deep is 180 cubic feet, or 6.67 cubic yards. At 1.5 tons per cubic yard, that is 10 tons before waste. With 10 percent extra, plan for about 11 tons, then confirm the truck minimum and delivery access with the supplier.
Shed pad base
A 12 ft by 16 ft shed pad at 5 inches deep is 80 cubic feet, or 2.96 cubic yards. At 1.5 tons per cubic yard, that is about 4.44 tons before waste. With 15 percent extra for compaction and edge cleanup, the practical order is about 5.1 tons.
Practical gravel tips
- Use crushed, angular stone for compacted bases and rounded gravel mainly for decorative areas.
- Ask the supplier for density when ordering by ton because moisture and stone size change weight.
- Plan separate base and top layers for driveways instead of treating the full depth as one product.
- Confirm drainage slope before adding gravel near foundations, doors, or low spots.
- Order a modest reserve when compaction is required, but avoid blocking drainage with excess stone.
What number should I use?
Use measured inputs first
Start with the actual number from your project, device, network, trip, or equipment label instead of a best guess.
Round in the safer direction
Round up for materials, food, water, storage, and capacity. Round down for runtime when running short would cause trouble.
Check related tools
Use the related calculators on this page to plan the next part of the job instead of treating one result as the whole answer.