How to Calculate Pea Gravel for a Driveway

Driveways are the least forgiving gravel job: the loads are big, supplied by the ton, and the error cost is real. This guide walks a sectioned calculation from footprints to an order sheet. The Pea Gravel Calculator runs every step for you.

Step 1: split the driveway into rectangles

Measure each leg of the driveway (driveway to parking pad, apron to drain, etc.) as its own rectangle — length × width in feet. Two sections stacked in the calculator add correctly; a single guess rarely does.

Step 2: choose the depth per section

For a pea-gravel drive surface over an existing compacted base, common depths run 2–3 inches for walking paths and driver surfaces; a fresh install over subsoil is typically deeper with a separate base layer underneath. Depth presets are options, not engineering: the right base depends on your soil and subgrade. Measure, don't inherit.

Step 3: run the volume, honest ranges only

• Cubic feet = area × depth (in) ÷ 12
• Cubic yards = cubic feet ÷ 27
• Weight: only from a density. The calculator shows a sourced lb/ft³ interval as a range — never a set number. Suppliers specify densities themselves (ask), or enter theirs for the exact math.

Step 4: how suppliers price a driveway load

Bulk is priced in cubic yards, per ton, or a billed delivery. Type each into the calculator to produce your comparison. Two things often catch buyers out:

• Delivery minimums. A 1-yard order billed per ton can carry a flat fee that swamps the material price. That flat fee plus your yards reads as one number in the result panel.
• Settling. Delivered gravel compacts a little as it is spread; set the waste percentage with that in mind.

Bagged vs bulk at these sizes

A 0.5 ft³ bag of pea gravel goes quickly on a driveway: real ordering is almost always bulk. Bag count remains useful for walkways and small patches — the calculator still shows both if you enter both prices.