Gravel Sizes and Types Explained
Gravel is graded by stone size, from fine crusher run and pea gravel (about 3/8 inch) up to 3/4 inch and 1.5 inch stone. Use crushed, angular stone for bases and driveways because the pieces lock together, and rounded pea gravel for paths and decoration.
Common sizes
Crusher run (a mix of fine dust and small stone) compacts hard and is used as a base. Pea gravel (about 3/8 inch, rounded) is smooth underfoot for paths. Larger 3/4 inch and 1.5 inch stone is used for drainage and heavier driveways.
Angular crushed stone interlocks and stays put; rounded gravel shifts more but looks and feels better for walking areas.
Which size for which job
Driveway base: coarse crushed stone or crusher run, compacted, topped with a finer driving layer. Drainage: larger washed stone that lets water through. Paths and patios: pea gravel or fine decorative stone. Decoration: river rock or colored stone.
Set the depth in the gravel calculator (about 2 inches for cover, 4 to 6 inches in layers for a driveway) to get yards and tons.
FAQ
What size gravel is best for a driveway?
A compacted base of coarse crushed stone or crusher run, topped with a finer 3/8 to 3/4 inch driving layer. Angular crushed stone locks together better than rounded gravel.
What is crusher run?
A mix of crushed stone and stone dust that compacts into a hard, stable base. It is commonly used under driveways, patios, and paths.
What is pea gravel?
Small, rounded stone about 3/8 inch across. It is smooth and comfortable underfoot, which makes it popular for paths and patios, but it shifts more than angular stone.