Limestone Base Calculator
Calculate the amount of limestone base material needed with compaction factors included.
Quick Answer
Limestone base weighs about 1.5 tons per cubic yard. Multiply area × depth in feet, divide by 27 for cubic yards, add about 20% for compaction, then multiply by 1.5 for tons. A 4–6 inch compacted base suits most driveways.
Limestone Base Calculator Guide
Crushed limestone is one of the most popular base materials for driveways, patios, and sheds because its angular, dusty mix compacts into an exceptionally hard, stable layer. Our limestone base calculator helps you work out exactly how much you need in cubic yards and tons, including a compaction allowance so you don't come up short halfway through the job.
Limestone base — often sold as crusher run, #411, or 3/4-inch minus — combines coarse stone with fine 'fines' that bind under compaction. Lay it in 2-4 inch lifts over a separated subgrade, compact each lift, and you'll get a base that resists rutting and drains well for years. For converting your volume to a supplier's tonnage, pair this with our stone tonnage calculator.
Get a Limestone Base That Locks Solid
Crushed limestone only delivers its famous stability if it's compacted — the stone dust in the mix needs pressure to bind the larger pieces together. Run a plate compactor over each two-inch lift and it sets up like pavement; skip it and it stays loose and ruts. Laying a geotextile fabric under the base first stops it from punching down into soft soil, which is the usual reason a base settles and disappears over a season.
Plate Compactor
Packs limestone in lifts so the fines bind the stone into a hard, no-rut base.
Check Price on AmazonGeotextile Separation Fabric
Stops the base from sinking into soft subgrade so it stays put and load-bearing.
Check Price on AmazonThe product links above are affiliate links — at no extra cost to you.
Frequently Asked Questions
How thick should a limestone base be?
For walkways and patios, 3-4 inches of compacted limestone is typical. For driveways and areas with vehicle traffic, aim for 4-6 inches, and 8 inches or more over soft or clay soils. Always build it up and compact in 2-inch lifts rather than one thick layer.
How much extra should I order for compaction?
Crushed limestone typically loses 15-25% of its loose volume once compacted. Order about 20% more than your finished-volume calculation so you reach your target depth after tamping. Our calculator factors this in for you.
What's the difference between #411 and crusher run limestone?
Both blend coarse stone with fine dust for good compaction. #411 is a slightly more refined, screened product often used directly under pavers, while crusher run (crush and run) is a more economical mix common for driveway and sub-base work. Either works well as a compacted base.
Does limestone base drain well?
A compacted limestone base drains adequately for most patios and driveways, but because it contains fines it's less free-draining than clean, open-graded stone. For projects where drainage is critical, use a clean stone layer or a French drain alongside the base.