Quick start
- Enter length and width in feet. Measure the area that will actually be covered, not the whole yard or driveway around it.
- Enter depth in inches. Use finished depth for a top-up, path, bed, pad, or base layer, and estimate separate layers separately.
- Enter tons per cubic yard from your supplier when available. If the quote is by the ton, this input is what connects the cubic-yard math to the weight order.
Best uses
Start here if one of these sounds like your job. The examples below show which inputs matter most.
- Estimate gravel for a path, pad, or driveway section.
- Convert cubic feet into cubic yards.
- Estimate tons from supplier density.
- Check how changing depth changes material needs.
What this calculator is solving
The Gravel Calculator estimates volume and tonnage for one rectangular gravel layer. It is most useful when you can enter the supplier tons-per-cubic-yard value and then check compaction, delivery, and layer needs before ordering.
Match each input label on the calculator to the real measurement, amount, rate, unit, or setting for your job.
The formula in plain language
In plain language: The calculator uses cubic feet = length x width x depth inches / 12, cubic yards = cubic feet / 27, estimated tons = cubic yards x tons per cubic yard, and bag count = ceiling(cubic feet / bag cubic feet) when bag sizing is available. The examples on the page are there so you can compare your inputs with a gravel material example before copying the answer.
The example cards on the calculator page show a complete set of inputs and the kind of answer you should expect.
How to read the answer
Read the main result first. Then check the smaller lines for the totals, units, ranges, counts, or formula steps behind it.
- Cubic yards is the bulk volume estimate. A 20 ft by 10 ft area at 4 inches deep comes out to about 2.47 cubic yards before any extra compaction or delivery allowance.
- Estimated tons multiplies cubic yards by density. At 1.4 tons per cubic yard, that same 20 ft by 10 ft top-up is about 3.46 tons.
- Density used reminds you which conversion factor was applied.
- The answer is a planning number, not a supplier guarantee. A quarry may round to full tons, half yards, full yards, or truck minimums.
Common mistakes to avoid
If the answer looks strange, the most likely cause is a small input mismatch: a mixed unit, copied value, wrong mode, missing label, or result used for the wrong job.
- Do not assume tons and cubic yards are the same. Cubic yards measure volume; tons measure weight.
- Do not ignore compaction, moisture, stone shape, and loose-versus-compacted volume.
- Do not use one layer for a whole driveway if the project needs base, middle, and surface gravel with different depths.
- Ask the supplier about density, delivery minimums, truck access, dump location, and recommended overage before buying.
Research and references
These references help check the measurements, units, limits, or safety notes used in this guide.
Worked examples for Gravel Calculator
2.47 yd3 and 3.46 tons
0.56 yd3 and 0.75 tons
4.00 yd3 and 6.00 tons
8.89 yd3 and 13.33 tons
FAQ in plain language
When should I use the Gravel Calculator?
Use it when your task matches one of these common needs: Estimate gravel for a path, pad, or driveway section. Convert cubic feet into cubic yards. It works best when you already know length, width, depth in inches, tons per cubic yard, and optional bag size.
What is the Gravel Calculator doing with my inputs?
In plain language: The calculator uses cubic feet = length x width x depth inches / 12, cubic yards = cubic feet / 27, estimated tons = cubic yards x tons per cubic yard, and bag count = ceiling(cubic feet / bag cubic feet) when bag sizing is available. The examples on the page are there so you can compare your inputs with a gravel material example before copying the answer.
What do the main Gravel Calculator inputs mean?
Length, width, and depth: the rectangular gravel area and average finished depth. Tons per cubic yard: the supplier density used to turn volume into weight. Use the yard or quarry number when you have it. Cubic yards result: the bulk volume number many landscape suppliers use for gravel, stone, and base material. Tons result: the weight estimate. It is not interchangeable with yards unless the density matches.
How should I read the Gravel Calculator answer?
Read the headline estimate first, then check the material, waste, coverage, and unit lines. For project tools, the supporting lines are often the difference between a rough idea and a list you can actually shop from.
What should I double-check before trusting the answer?
This is a rectangular planning estimate. Real orders can change with stone type, moisture, compaction, loose versus compacted volume, driveway layers, drainage, edging, fabric, supplier density, truck access, delivery minimums, and local site conditions. Also check whether your supplier sells by cubic yard, by ton, or by bag, and ask how compaction, moisture, and delivery minimums affect the final order.
How do I calculate gravel cubic yards?
Multiply length by width by depth in feet to get cubic feet, then divide by 27. If depth is in inches, divide the depth by 12 first. The calculator does that conversion for you.
Are gravel tons and cubic yards the same thing?
No. Cubic yards measure volume, while tons measure weight. One cubic yard of common crushed stone is often around 1.35 to 1.5 tons, but the right number depends on the material and supplier.
Related tools
- Cubic Yard Calculator Convert length, width, depth, and waste into cubic feet and cubic yards.
- Sand Calculator Estimate sand cubic yards and tons from length, width, depth, density, and waste.
- Paver Base Calculator Estimate gravel base and bedding sand volume for patios, walkways, and paver projects.
Keep exploring
If this guide is close but not exact, these links keep you near the same kind of problem.
- Home & Projects Browse the full category for related tools that help with the same job.
- All free tools Search the complete Access Free Tools library by task, category, or tool name.
- All calculator and utility guides Find more plain-language examples, formulas, mistakes, and result explanations.
- Free calculator resources Start here when you are not sure which calculator page fits.
Privacy and copying results
Recent answers stay visible only while you work in the current browser tab. They are not sent to a server.
Use Copy answer when you want to save the inputs and result in notes, homework, a message, or a project list. Check the units, labels, and limits before copying.