A measured plan. A clearer supplier order.
How much gravel should you order for your driveway? Measure the area, enter your chosen material layers, and turn finished depth into a loose-material order. Add supplier density, truck capacity and prices to estimate tons, deliveries and cost.
https://bizntools.com/home-projects/gravel-driveway-calculator
Enter a driveway area and finished layer depth to estimate gravel.
Start with your measured driveway area and chosen layer depth. See the loose volume to order, then add supplier details for weight, delivery and cost.
Measurements and quotes stay in this tab. Your entries are not added to page links.
Start with the footprint
For a simple rectangle, measure its length and width. Add another section for a widening, turnaround or parking space. Keep the sections separate enough that the same ground is not counted twice. If you already have the footprint’s area, choose Enter an area.
Area tells you how much ground the gravel covers. Finished depth tells you the thickness of each layer after the work is complete. Use the depth from your project plan; this calculator does not choose the material, drainage or structural layer design.
Every listed material covers every measured section. Add a separate material layer when the same footprint receives another material. If only part of the driveway needs that layer, calculate that area separately.
Confirm the supplier’s order increment, minimum quantity and loose bulk density. A cubic yard is a volume; a ton is a weight. Their relationship depends on the material and its supplied condition, not just the word “gravel.”
Enter the supplier’s cubic yards per load and delivery charge for each material. The calculator rounds loads separately. It does not combine different aggregates in a truck or verify the vehicle’s payload limit.
Finished depth is the starting point
Add the measured driveway sections, then calculate each material layer from its finished depth. Apply the entered loose-to-finished volume factor and separate extra allowance. Round each material up to its supplier order increment and minimum. Weight, deliveries and cost use that rounded loose order.
Add the non-overlapping section areas and multiply by the specified depth for one layer. In US units, divide square feet × inches by 324 for cubic yards.
Apply the loose-to-finished volume factor, then the separate extra allowance. Keep the supplier’s material condition and your finished-depth basis consistent.
Round each material to its order increment after checking the minimum. Use that ordered quantity for weight, separate loads and quoted material cost.
The loose-to-finished factor is a volume ratio. A value of 1 means equal loose and finished volumes. A value of 1.1 asks for 10% more loose material than the finished volume. Neither value describes how thoroughly a layer is compacted.
If someone instead says the material loses 10% of its loose volume, the calculation is different: finished volume is 90% of loose volume, so the ratio is 1 ÷ 0.9, or about 1.111111. A “95% maximum dry density” compaction requirement is another concept; it does not mean add 5% gravel.
Use the volume ratio or yield basis supplied for your project. Keep handling allowance separate, and avoid adding the same extra quantity twice. The calculator’s factor starts at 1 and its extra allowance starts at 0%.
Follow the complete order
A 20 × 10 ft section at a specified 12-inch finished depth is 200 cubic feet, or about 7.4074 cubic yards. A 1.1 loose-to-finished factor and separate 10% allowance make the loose requirement about 8.9630 cubic yards. Quarter-yard ordering rounds it to 9. At an entered 1.5 US short tons per cubic yard, that is 13.5 tons. Two 5-yard deliveries at $30 each plus material at $40 per yard give $420.
Suppose two separate layers each produce a 2-cubic-yard order. A 5-yard truck capacity means one delivery for each material, not one mixed load. Material A at $30 per yard costs $60. Material B at 1.2 US short tons per yard and $50 per ton costs $120. With a $40 delivery for each, the combined entered quote is $260.
An entered area of 324 square feet with a 2-inch layer is exactly 2 cubic yards. With factor 1, no extra allowance and quarter-yard ordering, the order remains 2 cubic yards. Switching the display to metric preserves the original exact quantity rather than buying another quarter yard because of a rounded area conversion.
The depths, density and prices above are arithmetic examples, not installation specifications or current market prices. Select Try example to load the first case, then replace its values with your measurements and supplier quote.
A quick volume check
This table shows geometrical finished volume only. It includes no loose-volume adjustment, extra allowance, supplier minimum or order rounding. The depths are calculation columns, not recommendations for driveway construction.
| Area | 2 in depth | 4 in depth | 6 in depth |
|---|---|---|---|
| 100 sq ft | 0.617 yd³ | 1.235 yd³ | 1.852 yd³ |
| 500 sq ft | 3.086 yd³ | 6.173 yd³ | 9.259 yd³ |
| 1,000 sq ft | 6.173 yd³ | 12.346 yd³ | 18.519 yd³ |
Calculated from the dimensions shown and rounded to three decimal places. One cubic yard equals 27 cubic feet; one inch equals 1/12 of a foot.
Multiply the ordered loose cubic yards by the supplier’s loose density in US short tons per cubic yard. Using an illustrative 1.5 short tons per cubic yard, 9 cubic yards would weigh 13.5 short tons. A different density gives a different answer; no density is prefilled here.
A price per ton needs density before it can become a material cost. A delivery charge needs capacity before the number of loads is known. Missing fields remain unknown. The results show any known material and delivery subtotals, with a combined entered quote only when both parts are complete for every layer.
Before calling the supplier
For a rectangular section, multiply length in feet by width in feet, then by finished depth in inches and divide by 324. This gives finished cubic yards. Your loose order may be larger after the entered volume factor, extra allowance, supplier minimum and order rounding. Add non-overlapping sections before applying each layer.
Multiply the ordered loose cubic yards by the supplier’s loose bulk density in US short tons per cubic yard. For example, 9 cubic yards at an entered 1.5 short tons per cubic yard is 13.5 short tons. That density is an example, not a default for every material. Without density, the calculator keeps weight unknown.
The material quantity alone cannot establish a project price. Enter a supplier price per cubic yard or per US short ton, plus a delivery capacity and charge, to build a material-and-delivery quote. Excavation, grading, drainage, installation labor, permits and taxes are outside this estimate. Local quotes supply the actual prices.
There is no depth recommendation built into this calculator. Material, site conditions, drainage and expected use affect the layer design. Obtain a suitable project specification, then enter each material’s finished depth. The calculator does not determine whether a layer stack is structurally adequate.
No. A factor of 1.1 means loose volume is 10% greater than finished volume. If 10% of the loose volume is lost on compaction, finished volume equals 90% of loose volume, so the factor is 1 ÷ 0.9, about 1.111111. Ask for the ratio or yield basis rather than treating all compaction percentages as the same.
They represent different adjustments. The factor converts a finished volume into its loose supply volume. Extra allowance adds the separate amount you choose for handling or project uncertainty. If the supplier’s ratio already includes that extra material, avoid adding the same allowance twice.
Use the direct-area option when you have an area measurement, or divide the footprint into non-overlapping rectangular sections. Every section receives all the listed layers. If a pad has different depths or materials, calculate it separately rather than applying one shared stack to both areas.
Each material order rounds up to its entered supplier increment after checking the minimum. For example, a requirement just above 2 cubic yards rounds to 2.25 when the increment is a quarter yard. The surplus shown is loose volume above the adjusted requirement, not guaranteed extra finished coverage.
No. Metric mode converts your measured areas and finished depths. Supplier quantities stay in cubic yards, US short tons and USD, with those units written on the controls and outputs. A US short ton is 2,000 lb; it is not a metric tonne or an Imperial long ton.
Volume does not require a density or a price. Weight needs a loose bulk density; load count needs a delivery capacity. A per-ton material quote also needs density. Delivery cost needs both the capacity and a delivery fee. Blank fees do not mean free delivery, so incomplete components remain marked rather than being added as zero.
US EPA — Gravel Roads Maintenance and Design Manual — Primary public source for gravel-road quantity context. This road maintenance manual is not used as a residential driveway design specification.
US EPA — Appendix C: Quantity Calculations — Pages C1–C2 relate area, thickness, cubic yards and truck capacity. The coverage chart excludes compaction. Its generalized shrinkage note is not a project-specific factor or a calculator default.
FHWA — Geotechnical Aspects of Pavements, Chapter 8 — Section 8.2 describes dry-density targets as construction acceptance criteria. This supports the distinction from a loose-to-finished volume ratio, not a default driveway compaction requirement.
Vulcan Materials — Construction Aggregates Calculator — Manufacturer quantity workflow uses dimensions and density to estimate material weight. Density still needs the correct material and supply condition.