Cubic Yards to Tons: How to Convert Different Materials

You measure your driveway and work out that it needs 9 cubic yards of gravel. Then you call the quarry and they quote you per ton. It is one of the most common snags in any landscaping job, because volume and weight are two different things and suppliers use whichever suits them. This article explains how to convert cubic yards to tons (and back again), gives typical weights for the materials people buy most, and shows why the same yard of stone can weigh noticeably more on a rainy day.

The Cubic Yards to Tons Formula

A cubic yard tells you how much space a material fills. A ton tells you how heavy it is. The link between the two is density, which for bulk materials is usually given in tons per cubic yard. Once you have that number, the conversion is a single multiplication:

If you do not yet know your cubic yards, start with length × width × depth in feet and divide by 27. Our guide to calculating cubic yards walks through that step for any shape.

When density is listed in pounds per cubic foot

Some product sheets give density in pounds per cubic foot instead. To turn that into tons per cubic yard, multiply by 27 (cubic feet in a yard) and divide by 2,000 (pounds in a US ton). A material listed at 100 lb per cubic foot works out to 100 × 27 ÷ 2,000 = 1.35 tons per cubic yard.

Cubic Yard Weight by Material

There is no single conversion factor, because a yard of wood chips and a yard of crushed granite are worlds apart in weight. These ranges are typical for material that is loose and reasonably dry:

Treat these as ballpark figures. The number that matters is the one on your supplier's ticket or product sheet, since their stone, their sand and their stockpile conditions are what you are actually buying.

Converting Cubic Yards to Tons by Material

Cubic yards to tons: gravel

Gravel shows exactly why density matters. Take 8 cubic yards for a driveway. At 1.4 tons per yard that is 11.2 tons. If the supplier's crushed stone runs at 1.7, the same volume weighs 13.6 tons, a difference of more than two tons from the same pile. The Gravel Calculator starts at 1.4 and lets you type in the exact figure your quarry gives you.

Cubic yards to tons: sand

Sand holds water readily, and wet sand weighs more. Three cubic yards for a paver base comes to 4.2 tons at 1.4 tons per yard. If the stockpile is damp and closer to 1.6, it is 4.8 tons. That gap is worth knowing when you are paying by weight. The Sand Calculator shows both yards and tons.

Cubic yards to tons: topsoil

A lawn project needing 6 cubic yards of topsoil weighs around 6.6 tons at 1.1 tons per yard. After a week of rain, the same soil could sit closer to 1.25, pushing it to 7.5 tons. Screened soil with more organic matter tends to be lighter, while heavy clay soils sit at the top of the range. Try the Topsoil Calculator with your supplier's number.

Cubic yards to tons: concrete

Ready-mix concrete is ordered by the cubic yard, not the ton, but its weight still matters. A 1.5-yard pour weighs roughly 3 tons, or about 6,000 pounds. That is useful to know when you are checking whether a truck can reach your site over a lawn or an older driveway. To work out the volume itself, use the Concrete Calculator or our slab estimating guide.

Cubic yards to tons: mulch

Mulch is almost always sold by volume, and it is far lighter than stone or soil. Ten cubic yards at 0.3 tons per yard is about 3 tons. Fresh, wet mulch can weigh considerably more than an aged, dry pile, so weight estimates for mulch are especially loose. For quantities, the Mulch Calculator is the better tool.

How to Convert Tons to Cubic Yards

Sometimes the problem runs in reverse. A quarry quotes 15 tons of crushed stone and you want to know how much ground it will cover. Divide the tons by the density: at 1.5 tons per yard, 15 tons is 10 cubic yards. At 4 inches deep, one cubic yard covers 81 square feet, so 10 yards covers about 810 square feet.

Swap in your own density and the same division works for sand, soil or anything else sold by weight.

Comparing a per-yard quote with a per-ton quote

Say one yard charges $45 per cubic yard of gravel and another charges $32 per ton. Multiply the per-ton price by the density to put them on the same footing: at 1.4 tons per yard, $32 × 1.4 = $44.80 per cubic yard. The two quotes are almost identical, so delivery fees and minimum loads will probably decide it.

Short Tons, Metric Tonnes and Pounds

In the United States, a ton almost always means a short ton of 2,000 pounds. A metric tonne is 1,000 kilograms, or about 2,205 pounds. The difference is roughly 10 percent, which is easy to overlook if you are reading a product sheet from overseas.

If a density is listed in tonnes per cubic meter, multiply it by 0.843 to get US tons per cubic yard. A sand rated at 1.6 tonnes per cubic meter comes to about 1.35 tons per cubic yard.

Why Weight Estimates Vary

• Moisture. Water fills the gaps between particles and adds weight without adding much volume. Rain-soaked sand or soil can be noticeably heavier than dry.
• Particle size and shape. Angular crushed stone packs differently from rounded pea gravel, and fine particles fill gaps that coarse ones leave open.
• Loose versus compacted. A yard of loose gravel in a truck weighs less than a yard that has been rolled flat in your driveway, because compaction squeezes more material into the same space.
• Composition. Granite, limestone and river rock all have different densities, and soil blends vary with their mix of sand, silt, clay and organic matter.

Why Cubic Yard Weight Matters

Weight decides how the material gets to your project. Many light pickups have a payload rating somewhere around 1,500 to 2,000 pounds, which you can find on the sticker inside the driver's door. A single cubic yard of gravel at roughly 2,800 pounds can exceed that, while a yard of mulch fits comfortably. Weight also matters for delivery trucks driving over lawns or soft ground, and for how many trips a wheelbarrow will take to move the pile.

Tips for an Accurate Conversion

• Ask the supplier for their density figure before you compare quotes priced in yards against quotes priced in tons.
• Check whether "ton" means short tons or metric tonnes on any product sheet.
• Calculate the volume first, then convert. Guessing weight from a pile size is rarely accurate.
• Allow a margin if the material has been sitting in the rain.

Frequently Asked Questions

Can I convert tons to cubic yards without knowing the density?

Not precisely. You can use a typical figure from the table above for a rough idea, but the answer could be off by 20 percent or more. One phone call to the supplier for their tons-per-yard number fixes that.

Why does my delivery ticket show a different weight than I estimated?

The stockpile may have been wetter or drier than the figure you used, or the material may be a different grade. The truck is weighed on a scale, so the ticket reflects what was actually loaded on the day.

How many cubic yards are in a ton of topsoil?

Divide 1 by the density. At 1.1 tons per cubic yard, one ton of topsoil is about 0.91 cubic yards.

Does a cubic yard of concrete weigh 2 tons?

Roughly, yes. Standard concrete weighs around 4,000 pounds per cubic yard, which is about 2 US tons. The exact figure depends on the mix.

Is there a cubic yards to tons calculator?

Yes. The gravel, sand and topsoil calculators on this site show tons alongside cubic yards, and each has a density field you can change to match your supplier.

Final Thoughts

Converting cubic yards to tons comes down to one number: density. Multiply yards by density to get tons, or divide tons by density to get yards, and always use your supplier's figure when you can. For the volume side of the job, see how many cubic feet are in a cubic yard, or let the Gravel Calculator, Sand Calculator and Topsoil Calculator do both steps at once. More guides are on the blog.