Focused material tools

Reference basis: fixed unit conversions follow the NIST SI conversion tables. Bulk density is product- and condition-specific; the FHWA Field Materials Manual documents aggregate sampling and moisture-density testing; supplier or project data for the actual product and condition should replace the planning preset when available. The USGS aggregates program is used for aggregate terminology and scope. Read the full methodology and limitations.

Rock, Gravel & Aggregate Calculators

Choose a calculator for rock, gravel, crushed stone, aggregate, sand, road base, drainage stone, riprap, asphalt, or a closely related bulk-material conversion.

Reviewed: September 24, 2026

Aggregate supplier yard with separate piles of sand, crushed stone, rounded gravel, and riprap

Choose the result you need

Start with the material and purchase unit on the supplier quote. Calculate separate layers or areas when depth, density, or material changes. Density presets are planning values; a supplier value is usable only when it describes the exact product and the same loose or installed state as the volume being converted.

Rock, aggregate and sand

Gravel CalculatorGeneral gravel coverage and supplier quantities.Crushed Stone CalculatorClean grades, aggregate with fines, screenings and trap rock.Pea Gravel CalculatorRounded pea gravel with containment and package guidance.River Rock CalculatorDecorative stone size and coverage.Limestone CalculatorMatch quarry grading to the intended layer.Granite CalculatorCrushed and decomposed granite product planning.Sand CalculatorBulk sand volume and matching-state weight.Lava Rock CalculatorMultiple beds and actual label-volume or weight packages.

Project and driveway tools

Gravel Driveway CalculatorSeparate courses with explicit supply yield and loads.Road Base CalculatorSpecified base courses, lift counts and truck payloads.French Drain CalculatorStone-filled trench with optional pipe displacement.Riprap CalculatorSpecified slope-face, toe and erosion-control quantities.Gabion Stone CalculatorMultiple basket sizes, counts and supplier selling units.Paver Sand CalculatorSeparate bedding volume from joint-sand package coverage.Asphalt CalculatorSupporting driveway tool for specified compacted mix tonnage.

Related soil and landscape materials

Topsoil CalculatorNet bed or layer fill, occupied volume and actual bag yields.

Fill dirt, compost and organic mulch remain secondary presets on the main calculator. They do not need separate pages that repeat the same task.

Conversions and supplier comparison

Cubic Yard CalculatorBulk volume from measured dimensions.Square Feet to Cubic YardsArea and depth converted to volume.Tonnage CalculatorConvert matching-state volume and weight.Stone Weight CalculatorSolid stone pieces using solid-stone density.Material ComparisonCompare supplier density, delivery and cost side by side.

Directory updated October 16, 2026.

A traceable estimating path

Measure geometry first, convert volume second, and use a supplier density only when a weight estimate is required. Add waste, settlement, or compaction for a stated reason and never silently apply the same allowance twice.

Before placing an order

Confirm the exact product, loose or compacted basis, order unit, minimum load, delivery fee, access limits, and tax. Calculators estimate quantity; they do not select a structural pavement section or guarantee a supplier’s load size.