How-To Guides · For homeowners & landscapers
How Many Cubic Yards Fit in a Dump Truck? Tandem, Tri-Axle, Dump Trailer and Pickup Capacities
Suppliers talk in loads, you think in yards, and the truck’s bed is only half the story. Here is what each truck carries by volume and by weight, and how to tell what actually arrived.
In short
- A tandem-axle dump truck bed holds 10–16 yd³ (most 10–14); a tri-axle 16–20; a 10–12 ft dump trailer about 4; a full-size pickup 2–3 level with the sides.
- Heavy materials hit the weight limit first. A tandem rated for roughly 13–16 US tons of payload carries only 8–11 yd³ of gravel even when the bed holds 14.
- Light materials fill by volume. Mulch heaps a tandem full at only 3–5 tons.
- The scale ticket tells you weight, the pile tells you volume. Check one or the other before you spread.
Dump truck capacities by type
“A load” means whatever the supplier’s truck is allowed to carry, and that depends on two limits: how much the bed holds, and how much weight the truck is registered and legally permitted to put on the road. The volumes below are typical bed capacities; the payloads are typical, and they vary by state axle-weight law and by how the truck is registered, so ask the hauler for theirs.
| Vehicle | Bed volume | Typical payload | Notes |
|---|---|---|---|
| Full-size pickup | 2–3 yd³ level | About ½–1 US ton | Fine for a yard of mulch; half a yard of gravel |
| One-ton dump body | 3–5 yd³ | A few tons | Landscapers’ workhorse |
| Single-axle dump truck | 6–8 yd³ | Several tons | Common for residential deliveries |
| Tandem-axle dump truck | 10–16 yd³ (usually 10–14) | About 13–16 US tons | The standard aggregate delivery truck |
| Tri-axle dump truck | 16–20 yd³ | Roughly 18–22 US tons | Quarry and large-site deliveries |
| 10–12 ft tandem dump trailer | 3.9–4.6 yd³ | A few tons; check the trailer’s rating | Rental trailers behind a pickup |
Bed volumes from Boom & Bucket’s tandem dump truck guide and United Rentals’ dump trailer specifications. Payloads are approximate and vary by state.
Volume or weight: which limit you hit first
Gravel and crushed stone weigh 1.4–1.7 US tons per loose cubic yard. Fill a 14-yard tandem bed with stone and you have put 20–24 tons in it, well past what most tandems may legally carry. So the driver stops at the weight limit, and a “full” tandem of gravel is 8–11 cubic yards with the bed visibly not full. Boom & Bucket’s guide to tandem dump trucks puts the typical capacity at 10–16 cubic yards and notes that soil loads run around 12–15 yards and 18–22 tons, which already shows the weight limit at work.
Mulch is the opposite case. At 0.2–0.4 tons per cubic yard, 14 yards of mulch weighs 3–6 tons, so the bed fills long before the axles complain, and mulch trucks run heaped. Topsoil, at 1.0–1.3 tons per yard dry, sits in between: a tandem can carry its bed volume when the soil is dry and runs out of weight when it is wet. For the densities behind these numbers see how much a cubic yard weighs.
| Truck | Mulch | Topsoil | Gravel / crushed stone |
|---|---|---|---|
| Full-size pickup | 2–3 yd³ | About ½–1 yd³ | About ½ yd³ |
| 10–12 ft dump trailer | 4–4.6 yd³ | 3–4 yd³ | About 3 yd³ |
| Tandem-axle dump truck | 10–14 yd³, heaped | 10–13 yd³ | 8–11 yd³ |
| Tri-axle dump truck | 16–20 yd³, heaped | 15–18 yd³ | 11–14 yd³ |
Approximate yards per load. Mulch is limited by the bed; gravel is limited by weight; topsoil by whichever comes first. Ask the supplier how many tons and yards they will bill.
Heaped versus struck
Two numbers describe the same bed. The struck capacity is the volume level with the top of the sides. The heaped capacity adds the crown of material piled above them, which on a tandem can be a couple of yards more. Light materials are quoted and delivered heaped. Dense materials never get there because the weight limit arrives first. When a supplier quotes “a 12-yard truck”, ask whether that is struck or heaped and whether the load you are paying for is measured in the bed or over the scale.
How many tons is a dump truck of gravel?
A tandem carrying its legal payload delivers roughly 13–16 US tons of stone, and a tri-axle roughly 18–22, though the exact figure depends on your state’s axle-weight limits and the truck’s registration. One ton of crushed stone is about 0.6–0.7 cubic yards, so convert in either direction with that factor; Inch Calculator’s cubic yards to tons tool covers other materials. Whether the ton or the yard is the better unit to buy in is a separate question, which we take up in buying gravel by the ton or by the yard.
What a 10-yard pile looks like on the ground
Ten cubic yards is 270 cubic feet. Dumped in one place and left as a clean cone at a 35° angle of repose, that is a pile about 14 ft across and 5 ft high. Real deliveries rarely look like that. A driver dumping a tandem usually pulls forward as the bed rises, so the load lands as a ridge 20 ft or more long and only 3–4 ft high, and a pile of damp mulch or topsoil slumps wider than stone. The volume is the same; the shape is not, which is why you should measure your pile rather than compare it with a picture. The stockpile volume formula guide has the cone, ridge and frustum formulas with worked examples.
Knowing what you actually got
Three checks, in order of effort. First, ask the supplier for the truck’s rated capacity and the quantity on the ticket before the truck leaves the yard. Second, read the scale ticket if there is one: gross weight minus tare weight is the net load, and it should match the invoice to the ton. Third, measure the pile. The tape-and-cone method in how to measure a pile of gravel, dirt, sand or mulch takes fifteen minutes; a walk around the pile with Stockpile Scan takes a few and reports the volume with a ± range worked out from that scan, plus a weight estimate for the material you choose, so you can compare against a ticket written in tons.
If the numbers do not line up, the routine in checking a mulch, topsoil or gravel delivery walks through what to photograph, who to call and how much settling is normal. For the wider picture of how piles get measured, start with how to measure a stockpile.
Frequently asked questions
How many yards of gravel are in a tandem dump truck?
Usually 8 to 11 cubic yards, even though the bed holds 10 to 14. Gravel weighs 1.4 to 1.7 US tons per cubic yard and a tandem may legally carry roughly 13 to 16 tons of payload, so the driver stops at the weight limit with the bed visibly not full.
How many tons does a dump truck hold?
A tandem-axle dump truck typically carries about 13 to 16 US tons of payload and a tri-axle roughly 18 to 22, but the exact limit depends on state axle-weight law and how the truck is registered. Ask the hauler what their truck is permitted to carry.
How many yards of mulch fit in a dump truck?
Mulch is light, 0.2 to 0.4 tons per cubic yard, so the bed fills before the weight limit does. A tandem delivers 10 to 14 cubic yards heaped and a tri-axle 16 to 20. A full-size pickup carries 2 to 3 yards level with the sides.
How big is a 10-yard pile of gravel?
As a clean cone at a 35-degree angle of repose, 10 cubic yards (270 cubic feet) is about 14 feet across and 5 feet high. A truck that pulls forward while dumping leaves a longer, lower ridge instead, often 20 feet long and 3 to 4 feet high, with the same volume.
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.