Gravel Calculator
Calculate cubic yards and estimated tons of gravel for driveways, walkways, pads, and landscaping.
Enter your numbers
How this calculator works
Cubic yards = length × width × depth(ft) ÷ 27. Tons = cubic yards × material density.
Worked example
A 40 × 12 ft area at 4 in deep is about 5.9 yd³ before extra material.
Measure compacted depth
Enter the finished compacted depth, then ask the supplier whether the selected material is sold and delivered loose. Gravel settles and compacts, so the loose delivery volume may need to exceed the finished geometric volume. The required factor depends on aggregate type, moisture, gradation, and compaction method.
Divide irregular areas into rectangles or measured sections and add them. For a driveway, confirm the base, intermediate, and surface layers separately because each can use a different aggregate and depth.
Convert volume to tons carefully
Tons per cubic yard is a material-specific bulk-density estimate, not a universal conversion. Use the supplier’s stated density or coverage whenever available. Round delivery quantities to the supplier’s increments and check truck access, maximum load, and where each load can be placed safely.
Sources & assumptions
The default density is an editable planning value of 1.4 tons per cubic yard. Aggregate type, gradation, compaction, and moisture can materially change actual weight; use the supplier’s stated density when available.
Frequently asked questions
How much does a cubic yard of gravel weigh?
It varies by material and moisture. A planning value around 1.3 to 1.5 tons per cubic yard is common, but your supplier should provide a more accurate density.
Should I add extra gravel?
Yes. Add material for compaction, grading, uneven ground, and delivery tolerance.
Gravel driveway guide
See how depth, compaction, and material density change an order in the Gravel driveway depth and tonnage guide.