Separate layers. Separate orders.
Measure your driveway areas, then estimate volume, optional weight and material cost for each layer in your confirmed plan.
Layered bulk materials
Measure areas once, then estimate each material layer separately.
Methodology
Add non-overlapping rectangle areas: length × width. Every listed layer covers all those areas at its own uniform depth. For feet and inches, layer volume = area × depth ÷ 12. Metric depth uses centimeters, converted to meters. The tool does not specify a driveway’s layer design.
Planned loose volume = exact layer volume × (1 + allowance ÷ 100). Start at 0% and enter a supplier-confirmed increase if needed. This is not shrinkage: a 10% allowance multiplies by 1.10; 10% shrinkage would require a different calculation. Do not add the same adjustment again as waste.
Weight = planned volume × density for the same loose supplied material. US density uses lb/yd³; divide pounds by 2,000 for US short tons. Metric density uses kg/m³; divide kilograms by 1,000 for metric tonnes. Without density, only volume is estimated. A project’s total weight requires density for every layer.
Layer cost = planned volume × your volume price, or estimated weight × your price per short ton or metric tonne. Quantities retain precision and are not rounded to whole tons. Missing layer prices produce a labeled subtotal. Confirm supplier selling increments, minimums, delivery fees and taxes separately.
Worked example · illustrative inputs
240 ft³exact volume
+10%example loose allowance
→264 ft³planned loose volume
264 ft³ is about 9.778 yd³. If the supplier gives 2,700 lb/yd³ for this material, the estimate is 26,400 lb, or 13.2 US short tons. At an illustrative $40 per US short ton, material cost is $528. The calculation uses 13.2 tons, not 14. The same order is about 7.476 m³ and 11.975 metric tonnes; an equivalent per-tonne quote is about $44.09245, preserving the $528 cost.
The thickness, allowance, density and price are arithmetic examples, not an engineering specification or current retail quote. For two layers, calculate each layer at its own depth, allowance, density and quote. Sum their volumes for a project summary; order the two materials separately.
Frequently asked questions
Enter each rectangular area and the uniform depth of every material layer in your confirmed plan. The calculator combines areas, applies each layer's chosen loose-volume allowance once, and shows separate material quantities. It does not select a suitable depth.
Only with density for the material being supplied. Weight pricing requires supplier density. No universal gravel density is assumed, and leaving density blank in volume pricing gives a volume estimate only.
US mode uses a short ton of 2,000 lb. Metric mode uses a tonne of 1,000 kg. The tool converts the density and per-weight quote with the unit switch so the physical order and cost stay the same.
No. It is an increase in the loose volume you plan to order: target volume multiplied by one plus the percentage. A shrinkage percentage uses a different denominator. Confirm the correct volume basis and adjustment before ordering; the tool does not prescribe a compaction rate.
Some layers have a price and others do not. The subtotal includes only priced layers and lists those needing a quote. A complete material estimate appears only when every layer is priced; tax, delivery and labor remain excluded.
This tool combines differently sized driveway areas and multiple material layers, each with its own allowance, density and volume or weight price. Mulch & Gravel serves one area or repeated identical areas and can compare bags with bulk volume.
This is a bulk-material estimate. It does not design a pavement structure, select aggregate, recommend layer thickness, determine compaction, verify drainage or establish handling safety. Layer volumes use your measurements; density and prices come from the supplier. Each layer is estimated independently, and project totals do not turn different products into one order.
Aggregate estimating uses dimensions and material-specific or custom density. Its density presets and engineering assumptions are not adopted here; confirm the supplied material state with your supplier.
US short ton: 2,000 lb = 907.18474 kg. Metric tonne: 1,000 kg. These distinct units also determine the per-weight price conversion.
Last reviewed: October 5, 2026