How Many Cubic Yards in a Dump Truck? Capacity Chart by Truck Class

The short answer

Bed volume: a pickup hauls 1–3 yd³, a single-axle dump 5–7, a tandem 10–14, a tri-axle 15–18, and a semi end-dump 20–26 (typical US ranges). What you actually get: less, for anything heavy — because legal payload weight stops the loader long before the bed is full. A “14-yard” tandem hauling gravel delivers about 11 yards in practice, which is the whole story of this guide. (If you're thinking about hauling it yourself, check how many cubic yards fit in a pickup truck first — the math is unforgiving there too.)

Capacity chart by truck class

The ranges below are struck bed volume — the bed filled level with the sidewalls — which is what manufacturers and rental counters quote. Heaped loads (piled above the rails) add volume, but heaped gravel on a public road is a spillage violation in most states, so plan on struck. Payload figures are typical US legal payloads after subtracting the truck's own (tare) weight.

Ranges vary by state, body size, and aluminum vs steel bodies (aluminum bodies are lighter, which buys extra payload). Published sources quote tandem bodies anywhere from 10 to 16 yards and tri-axles up to 20+ — the table uses the conservative middle of those ranges, which is what you should order against.

Which truck will the supplier actually send?

For a homeowner order, you rarely get to choose the truck — the supplier matches the truck to your order size and your driveway's access. The patterns are consistent enough to plan around. Under ~2 yards: expect a single-axle or a flatbed with a partial load — and you'll pay the full delivery fee for a quarter load, which is why orders under 1–2 tons often lose to self-haul in a pickup or rented dump trailer. 2–7 yards: a single-axle dump, the residential workhorse: maneuverable, driveway-friendly, and commonly the smallest truck a yard will dispatch. 8+ yards: a tandem, which is the default aggregate delivery truck for a reason — it balances payload, cost per ton, and street legality. Tri-axles and semis show up for commercial jobs or large rural projects; a residential driveway rarely has the turning radius or the surface strength for them.

Access decides more than you'd think. A loaded tandem weighs 35,000+ lbs — it will crack a thin or aging concrete driveway and rut a soft lawn after rain. If the truck can't reach your project, the driver dumps at the curb and you wheelbarrow the difference: at roughly 14–18 wheelbarrow loads per cubic yard, a 10-yard curb dump is ~150 trips, so budget the help. Tell the yard about low wires, narrow gates, steep grades, and soft ground when you order — a failed delivery attempt still bills the trip. And ask whether they tailgate-spread: many yards will spread the load in a rough layer as the truck pulls forward (often +$50–$150), which is not fine grading but saves an enormous amount of shoveling on driveways and paths.

The key section: why weight beats volume

Dump truck “capacity” is sold as a volume, but the law regulates it as a weight. A loader operator watches the scale, not the bed rails: they fill until the truck reaches its legal payload, then stop. For light materials the bed fills first (volume-limited); for dense materials the scale wins (weight-limited). The cutoff is simple math: effective yards = payload (tons) ÷ density (t/yd³).

Notice the pattern: only mulch and dry organics ever fill the bed. Everything mineral is weight-limited, and the denser the material, the emptier the bed looks at delivery. That half-empty-looking truck is not short-changing you — the scale ticket is the receipt, and legal payload is the quantity.

The key calculation: 14 yards of gravel in a tandem

Run the numbers for the textbook case — a nominal “14-yard” tandem loaded with gravel at this site's crushed-stone density of 1.40 t/yd³ (2,800 lbs/yd³):

14 yd³ × 1.40 t/yd³ = 19.6 tons. A typical tandem carries ~15–16 tons of legal payload. 19.6 > 16 — the load is illegal by nearly 4 tons before the bed is full. The loader therefore stops at the scale limit: 16 ÷ 1.40 = 11.4 yd³, so you effectively receive about 11 cubic yards — a bed that looks roughly 80% full.

Contrast with mulch at 0.40 t/yd³ (800 lbs/yd³): 14 yd³ × 0.40 = 5.6 tons — barely a third of the truck's payload. The bed fills completely with payload to spare, so mulch delivery is volume-limited: you get all 14 yards, and the truck leaves light. This is why mulch suppliers price big loads casually and gravel suppliers talk in tons — and why a “10-yard minimum” means very different things for the two materials. Size your order with our gravel calculator or mulch calculator, and if you're converting between the two units, the tons to cubic yards calculator uses the same densities as this page.

Delivery costs: what a load runs

Prices are typical US ranges, as of Oct 2026. Delivery is priced per load, not per yard — a half load costs the same truck time as a full one, so small orders pay a premium per yard.

The cost-per-yard math is where the wheelbarrow guide earns its keep: a 10-yard tandem of gravel at $600 delivered is $60/yard; hauling the same material yourself in a pickup at 1 yard a trip is ten trips of fuel, time, and loader fees. Suppliers also enforce minimums (often 2–10 tons) — below the minimum, self-haul in a pickup or trailer wins. To feel the scale contrast, one cubic yard is about 14–18 wheelbarrow loads; a tandem delivery replaces roughly 150 of them.

Common mistakes

Ordering the bed's rated yards of dense material. You'll get the payload-limited amount — about 11 yards from a “14-yard” tandem of gravel — and the shortfall is legal, not a rip-off. Assuming heaped = delivered. Piled above the rails adds volume the scale won't allow anyway. Forgetting the driveway. A loaded tandem weighs 35,000+ lbs; it will crack thin concrete and rut soft lawns — have the driver dump at the curb or on plywood if the driveway can't take it. Paying a full delivery fee for a quarter load. Delivery is per trip; combine orders with a neighbor or round up to the truck's payload-limited sweet spot. Ignoring moisture. A yard of sand that rained on weighs up to 15% more — wet loads hit the weight limit with even fewer yards.