Gravel Calculator

Gravel calculation follows a straightforward volume formula: length x width x depth = cubic volume. The key challenge is converting between units (feet to yards, inches to feet) and then converting volume to weight for ordering purposes, since gravel suppliers sell by the ton or cubic yard. For a rectangular area, measure the length and width in feet, convert your desired depth from inches to feet (divide by 12), multiply all three together to get cubic feet, then divide by 27 to get cubic yards. To convert to tons, multiply cubic yards by the material density — typically 1.3 to 1.5 tons per cubic yard depending on gravel type and moisture content. Pea gravel runs about 1.3 tons per cubic yard, standard crushed stone about 1.4, and dense river rock up to 1.5. This calculator automates all these conversions so you just enter dimensions and depth, select your gravel type, and get accurate cubic yards and tonnage instantly. All math runs in your browser — your project measurements stay private.

Different projects require different gravel types and depths. Driveways typically need 4-6 inches of crushed stone (angular edges interlock and compact well under vehicle weight). Walkways and garden paths work best with 2-3 inches of pea gravel or decomposed granite (smoother underfoot). French drains and drainage applications use washed river rock at 6-12 inches deep to allow maximum water flow. Decorative landscaping beds use 2-3 inches of your chosen aesthetic stone. Base layers under pavers or concrete slabs require 4-6 inches of compactable crushed stone. Always order 5-10% extra to account for compaction settling and uneven ground — gravel compresses about 10-15% after being spread and compacted. This calculator provides exact volume and weight so you can place accurate orders with your local landscape supplier and avoid costly under-ordering or expensive excess material sitting unused.