Gravel & Stone Calculator
Input your project dimensions to calculate the exact volume and weight (in US Tons) of crushed stone or gravel required.
Gravel & Stone Estimator
Project Dimensions
Typically 2-3 inches for pathways, 4+ inches for driveways.
Material Type
Waiting for Dimensions
Understanding Stone & Gravel Quantities
Whether building a driveway, a dog run, or a solid base layer for concrete, ordering rock products correctly is crucial. Unlike mulch or dirt, stone is almost always sold by weight—specifically, by the US Ton.
The Conversion Formula
To buy tons of gravel, you first need to find the geometric volume of your project in Cubic Yards. You calculate the 2D footprint area (length × width), multiply it by the depth, and divide to get cubic yards.
From there, you multiply the cubic yards by the estimated density of the stone to find the weight in tons.
Standard Stone Densities
Different types of rock have wildly different densities. A cubic yard of volcanic pumice weighs much less than a cubic yard of crushed granite.
- Base Rock (3/4" Minus): Approximately 1.4 to 1.5 tons per cubic yard. Used heavily for foundational layers because it packs tightly.
- Pea Gravel: Around 1.35 to 1.4 tons per cubic yard. The rounded edges mean there is more empty air space between the rocks, slightly lowering the bulk density.
- River Rock / Drain Rock: Often closer to 1.45 tons per cubic yard, depending heavily on the specific gravity of the regional stone being quarried.
Tons vs. Yards Pricing
When calling a landscape supply yard, they will usually quote you a "price per ton." You can use this calculator to figure out exactly how many tons your project volume will demand, allowing you to easily budget the expense of materials and delivery.