Gravel Calculators
Written by Shakeel Alvi · Technically reviewed by Muhammad Qasim, PEC Reg. No. 63430 · Last reviewed: 2026-07-11
Five calculators live in this category, and gravel turns out to be a less uniform material than the name suggests. Crushed stone, pea gravel, and river rock settle, weigh, and compact at different rates, so the calculator you need depends on which one you're actually ordering.
Gravel Calculator
Calculate gravel volume, tons, cubic yards, and estimated cost.
Gravel Driveway Calculator
Estimate driveway gravel in tons, yards, and total cost.
Pea Gravel Calculator
Estimate pea gravel needed for landscaping.
Gravel Tons to Yards Calculator
Convert between gravel tons and cubic yards.
Gravel Cost Calculator
Estimate total project cost including delivery for gravel projects.
What you're deciding in this category
The first decision is volume or weight — local suppliers load material by the cubic yard, while quarries and larger commercial operations weigh delivery trucks and sell by the ton, and neither is wrong, just different units for the same pile. The second is material type, because density varies enough between products that using the wrong number quietly throws off a weight estimate: standard crushed stone runs close to 105 lb per cubic foot, pea gravel a touch lighter, river rock anywhere from 80 to 110 depending on how porous the stone is. The third is purpose — a structural driveway base gets compacted in place and needs a deeper, coarser layer, while decorative pea gravel over a walkway or garden bed sits loose and shallow and never sees a plate compactor.
Which calculator fits which job
The five tools split along those three decisions — general-purpose volume and weight, driveway base specifically, decorative pea gravel, a straight unit conversion, and total delivered cost.
- Gravel Calculator
- Use this as the general-purpose entry point — length, width, and depth in, cubic yards, tons, and an estimated cost out, for any gravel project that doesn't need the driveway or pea-gravel presets.
- Gravel Driveway Calculator
- Use this specifically for a structural driveway base, where depth needs to reflect a compacted layer rather than a loose one and the output assumes the coarser, angular gradation a base course actually needs.
- Pea Gravel Calculator
- Use this for decorative or walkway applications — pea gravel's rounded, smaller stone sits at a slightly different density than crushed base material, and this tool applies that number instead of the general default.
- Gravel Tons to Yards Calculator
- Use this when a supplier has already quoted a weight in tons and you need to know what volume that translates to, or the reverse — no project dimensions required, just the conversion.
- Gravel Cost Calculator
- Use this last, once volume or weight is settled, to price a full delivered order including a supplier's delivery fee — the only tool in this group built around total project cost rather than material quantity.
Standards that govern Gravel
ASTM D448 — Classifies aggregate by numbered size grade — the reason a supplier's "#57 stone" or "3/4-inch minus" designation means a specific, repeatable gradation rather than a rough description, and why a driveway base and drainage or pipe bedding call for genuinely different numbered gravels even though both get sold as gravel.
ASTM D698 — The Standard Proctor compaction test sets the reference density engineered base courses get measured against — the standard behind the gap between the loose density gravel gets sold at and the denser figure it settles to once a plate compactor runs over it, which is exactly the gap that trips up a volume-to-weight order.
Ordering by the density the yard scale used, not the one the ground ends up at
Every gravel calculator on this site converts volume to weight using a loose, as-delivered density, because that's the only number a supplier can quote before the material leaves the yard. What that number doesn't capture is compaction. A base course of crushed stone spread and run over with a plate compactor settles into a noticeably denser, shallower layer than the same tonnage looked like on the truck — order the depth you want after compaction using the loose-density figure, and you'll come up short once the material is actually packed down. Add 15 to 20% extra depth for any layer that's going to be compacted, on top of the standard waste allowance, or plan a second delivery.
Frequently Asked Questions
- How do I convert gravel tons to cubic yards?
- Divide the weight in tons by the material's density in tons per cubic yard — crushed stone at roughly 1.4 t/yd³ means 5 tons works out to about 3.57 cubic yards. The tons-to-yards calculator does this in one step.
- How deep should a driveway gravel base be?
- 4 to 6 inches of compacted material handles a typical residential driveway; heavier or commercial traffic needs 8 to 12 inches. Order for the compacted depth, not the loose depth the material arrives at.
- Is pea gravel the same density as crushed stone?
- No, and it's close enough to cause a noticeable error if you use the wrong preset — pea gravel runs slightly lighter than angular crushed stone, which is why it has its own calculator rather than sharing the general one.
- Do the calculators already account for compaction?
- They apply a standard waste and compaction buffer, but a base course you plan to compact heavily should get extra depth on top of that, since compaction pulls the settled depth down further than the default buffer alone covers.
- What's the real difference between gravel sold by the ton and by the yard?
- None in the material — it's a difference in how the supplier is set up to measure it. Landscaping yards with front-end loaders sell by the cubic yard; quarries with truck scales sell by the ton. Converting between the two is what the tons-to-yards tool is for.