What Size Gravel for Driveway?
Quick Answer
Use three layers: #3 stone base (4 inches), #57 middle (4 inches), and #8 or crushed limestone top (2-3 inches).
A well-built gravel driveway uses three layers of progressively smaller stone:
Base Layer (4 inches)
Use #3 stone (1-2 inches) or #4 stone (1.5-3 inches). These large angular stones create a stable foundation and won't sink into soft soil. A geotextile fabric under this layer prevents the stone from migrating into the subgrade.
Middle Layer (4 inches)
#57 stone (3/4 to 1 inch) is the standard choice. It fills the gaps in the base layer, adds stability, and provides a transition to the finer top layer.
Top Layer (2-3 inches)
#8 gravel (3/8 to 1/2 inch) or crushed limestone creates a smooth driving surface. Some homeowners prefer #411 (a blend of #57 stone and stone dust) because the dust fills voids and compacts into a very firm surface.
What to Avoid
Avoid using pea gravel or river rock for driveways — their rounded shape means they never lock together and will constantly shift under tires, creating ruts.
Need to calculate how much gravel you need?
Use our free gravel calculator to estimate materials for your project.