How-To Guides · For homeowners & landscapers
Buying Gravel by the Ton or by the Yard: Which Is Better, and How Not to Pay for Water
Stone yards quote tons, landscape yards quote cubic yards, and your project is measured in square feet and inches. Here is how the units relate, where the money hides, and how to check that you got what you paid for.
In short
- Crushed stone, sand and gravel usually sell by the ton off a certified scale. Mulch, soil and compost sell by the cubic yard because their weight swings with moisture.
- One US ton of crushed stone is about 0.6–0.7 yd³; one cubic yard is about 1.4–1.7 tons.
- Wet material weighs 10–20% more than dry. Bought by the ton, that water is on your bill. Bought by the yard, it is not.
- Convert every quote to a delivered price per cubic yard of what you need, then check the load against the scale ticket or a measured pile.
How each unit is sold, and why
Quarries and stone yards weigh trucks. A loaded truck crosses a certified scale on the way out, its empty weight is subtracted, and the difference goes on the ticket. Weighing is fast, legal for trade, and indifferent to how the load is heaped, so dense and consistent materials such as crushed stone, gravel and sand are sold by the ton almost everywhere. EngineerFix’s guide to how gravel is sold walks through the ton, the yard and the bag and lands on the same point: tons for bulk stone, yards for small orders and for anything that absorbs water.
Mulch, topsoil and compost are different. Their weight can swing by half depending on how wet they are, so a ton of mulch tells you almost nothing about how many beds it will cover. Landscape yards sell them by the cubic yard, measured in the loader bucket or the truck bed. Some yards go further and sell by the scoop, which is only as meaningful as the bucket behind it.
There is a second argument for weight on stone. As one bulk aggregate retailer explains, stone settles as the truck moves, so the volume that leaves the yard is not the volume that arrives. The weight is the same at both ends. That is true, and it is also what you would expect a seller of stone by the ton to say; it does not make the yard a worse unit for the buyer in every case.
| Material | Usual unit | Why | Conversion |
|---|---|---|---|
| Crushed stone, gravel | Ton | Dense, consistent, weighed on a scale | 1.4–1.7 tons per yd³ |
| Sand | Ton | Weighed, but moisture matters | 1.3–1.5 dry, 1.5–1.7 wet |
| River rock, decorative stone | Ton | Weighed; often priced high enough to care | About 1.35–1.5 tons per yd³ |
| Topsoil, fill dirt | Yard (sometimes ton) | Weight varies with moisture and clay | 1.0–1.3 dry; 1.1–1.5 fill |
| Compost | Yard | Light and very moisture-sensitive | 0.5–0.8 tons per yd³ |
| Mulch, wood chips | Yard | Light; coverage is what the buyer needs | 0.2–0.4 tons per yd³ |
US tons (2,000 lb) per loose cubic yard. Rain, grading and how long the pile has sat all move these; use the supplier’s own density when you have it.
Converting between tons and yards
Projects are planned in volume. A 12 by 30 foot parking pad with four inches of ¾-inch stone needs 12 × 30 × 0.333 = 120 ft³, which is 4.4 cubic yards. At 1.4–1.7 tons per yard that is 6.2–7.5 tons, and because base stone loses 10–15% of its volume when it is compacted, you would order 7–8 tons rather than 6. The full set of densities is in how much a cubic yard weighs, and Inch Calculator’s cubic yards to tons tool will do the multiplication for a long list of materials.
Going the other way, one ton of crushed stone is 0.6–0.7 cubic yards. Five tons is roughly three and a half yards, which as a dumped cone is about 10 feet across and 3½ feet high.
Where the water hides
Stone does not absorb water, but a pile of it holds water between the grains. The Engineering ToolBox density tables put dry sand at about 100 lb per cubic foot, damp sand at 115 and wet sand at 120, a spread of 15–20%, and crushed stone behaves the same way. A pile rained on overnight can weigh 10–20% more than the same pile after a dry week, and the top few inches dry into a crust that hides the moisture underneath.
When you buy by the ton, that water goes over the scale with the stone and onto your ticket. When you buy by the yard, it only changes the weight, which you are not paying for. Nobody is cheating here; it is how the unit works. But it does mean that a ton bought the morning after a storm is less stone than a ton bought after a dry spell, and that asking when the pile was last rained on is a fair question.
Compaction and settling
Volume has its own problem. Stone settles in the truck, so a bed that was level at the yard is an inch or two down on arrival with the same weight aboard. Mulch and soil settle more. And once you spread and compact base stone, it occupies 10–15% less space than it did in the pile, which is why installers order extra. If you buy by the yard, settling in transit is the seller’s favor to collect; by the ton, it does not matter. The physics of bank, loose and compacted volume is laid out in bank, loose and compacted yards.
Which unit favors the buyer?
By the ton favors you for dry, dense, uniform stone. A certified scale is the most honest measuring device in the trade, and it removes all argument about heaped buckets and settled beds. By the yard favors you for anything that soaks up water: mulch, compost, topsoil, and recycled concrete or screenings after rain. A yard of wet mulch is still a yard of mulch.
To compare quotes written in different units, convert both to a delivered price per cubic yard of what you actually need. Take the price per ton, multiply by the supplier’s own tons per yard for that product, and add delivery divided by the yards you are buying. Two quotes that look $8 apart per ton can swap places once a wetter product or a longer haul is in the sum.
Checking the load either way
If you bought by the ton, the scale ticket shows gross, tare and net weight with a time stamp; compare the net to the invoice. If you bought by the yard, measure the pile before it is spread: the cone method in how to measure a pile of gravel, dirt, sand or mulch takes fifteen minutes, and a walk around the pile with Stockpile Scan gives a volume with a ± range worked out from that scan, plus a weight estimate from the material’s density. That last part is what lets you check a ticket written in tons against a pile you can only see in yards, in either direction. If the two disagree by more than the ± range and a reasonable moisture allowance, the routine in checking a bulk delivery tells you what to do next, and how many cubic yards fit in a dump truck tells you what a full load should have been.
Frequently asked questions
Is gravel sold by the ton or by the yard?
Usually by the ton. Quarries and stone yards weigh each truck on a certified scale and bill the net weight. Landscape yards that serve homeowners often sell the same stone by the cubic yard or the loader scoop for small orders. Mulch, topsoil and compost are sold by the cubic yard because their weight changes with moisture.
How many yards of gravel are in a ton?
About 0.6 to 0.7 cubic yards. Crushed stone and gravel weigh roughly 1.4 to 1.7 US tons per loose cubic yard, so one ton is a little over half a yard and five tons is about three and a half yards. Wet stone is heavier, so a ton of it is slightly less volume.
Is it cheaper to buy gravel by the ton or by the yard?
It depends on the material and the weather. Dry, dense stone is usually best bought by the ton off a scale. Anything that absorbs water, such as mulch, compost or topsoil, is better bought by the yard so you are not paying for rain. Convert each quote to a delivered price per cubic yard using the supplier’s own density before comparing.
Does wet gravel weigh more?
Yes. Water held between the grains adds 10 to 20 percent to the weight of sand and stone, and a dry-looking crust can hide a wet pile underneath. When you buy by the ton that water is on your scale ticket, so a ton bought after a storm is less stone than a ton bought after a dry week.
Measure your next pile with your iPhone
Stockpile Scan is free, with no ads, subscriptions or account. Walk around a pile and get its volume, a ± range, a weight estimate and a PDF report, all on the phone.
Any iPhone with iOS 18 or later. LiDAR optional. Learn more about the app.
Related articles
Sources and further reading
- EngineerFix: how is gravel sold? By the ton, yard or bag
- HelloGravel: bulk gravel delivery by the ton
- Engineering ToolBox: densities of dirt, sand and mud, dry to saturated
- Inch Calculator: cubic yards to tons calculator
- SiteOne: calculating bulk materials for landscape and hardscape (compaction allowance)