How this truck bed calculator works
Two limits govern every pickup load, and the smaller one wins: the bed’s volume, and the payload on the door-jamb sticker:
per trip = min(bed yd³, payload ÷ lb-per-yd³)
At the defaults — a 6.5 ft bed, 64 in wide with 20 in rails, gravel at 2,800 lb/yd³, a 1,500 lb payload — the bed holds 2.14 yd³ level but the payload carries just 0.54 yd³: a 5.0 in layer across the floor, and 6 trips for a 3-yard job. The full chain is in the worked example. For stone, the truck runs out of sticker long before it runs out of bed.
Payload: the number on the door jamb
The class name on the tailgate is marketing; the certification label on the driver door jamb is the rating. Reading it right:
- The line that matters: “combined weight of occupants and cargo should never exceed XXX lb” — that is your payload.
- People count: two adults in the cab can spend 350–400 lb of it before the first shovelful.
- It varies truck to truck: cab, bed length, engine and options move the sticker hundreds of pounds within one model.
- “Half-ton” is historic: modern half-tons typically sticker ~1,500–2,300 lb — enter yours, not the class.
- Springs are not a rating: a truck that sits level can still be over its tires, brakes and axles.
Why stone fills the sticker, not the bed
Density decides which limit you hit. The site-wide figures the calculator uses:
- Mulch (800 lb/yd³): the one load where the bed and the sticker run out together.
- Topsoil (2,000 lb/yd³): one yard is a typical half-ton’s whole payload and change.
- Sand and gravel (2,700–2,800 lb/yd³): a half-ton carries about half a yard — a 5 in layer.
- Damp material weighs more: wet sand runs ~1.5 t/yd³ — rain adds hundreds of pounds a yard.
- Bulk delivery crossover: past a few trips, the yard’s delivery fee beats the fuel, time and wear.
Per-trip loads, and payload by truck class
Table 1 is the per-trip volume a 1,500 lb payload carries by material; Table 2 is the ballpark payload range by class — your sticker governs.
| Material | yd³ / trip |
|---|---|
| Mulch | 1.88 |
| Compost | 1.5 |
| Topsoil | 0.75 |
| Fill dirt | 0.68 |
| Sand (dry) | 0.56 |
| Crushed stone / gravel | 0.54 |
| Concrete | 0.37 |
| Class | Payload |
|---|---|
| Midsize | ≈ 1,100–1,600 lb |
| Half-ton | ≈ 1,500–2,300 lb |
| ¾-ton | ≈ 2,500–4,000 lb |
| 1-ton | ≈ 3,500–6,000+ lb |
How to figure your truck’s load
- Read the payload off the driver door-jamb sticker, and subtract the people riding along.
- Measure the bed inside — length, width between the walls, and the rail height.
- Pick the material — density is what turns the sticker into yards.
- Read the per-trip volume and fill depth, and which limit governs.
- Enter the job quantity for the trip count — then compare it to the yard’s delivery fee.
Worked example: gravel in a half-ton
The default, worked line by line — a 6.5 ft bed, 64 in wide, 20 in rails, gravel at 2,800 lb/yd³, a 1,500 lb payload, a 3 yd³ job:
level-full = 2.14 × 2,800 ≈ 5,992 lb — four payloads
per trip = 1,500 ÷ 2,800 = 0.54 yd³ → a 5.0 in layer
trips = ⌈3 ÷ 0.54⌉ = 6 trips
That is the whole story of hauling stone in a light truck: the bed swallows a full delivery by volume, but the sticker meters it out five inches at a time. Six round trips to the yard is real time and fuel — for this job, most people are better off paying the delivery fee once and spending the afternoon spreading instead of driving.
What this truck load estimate doesn’t cover
It checks bed volume against payload — the rest of the hauling picture:
- Trailers. Towing runs on different numbers — GVWR, GCWR, hitch and tongue weight.
- Axle and tire limits. The sticker’s GAWR lines and tire load ratings can bind before payload.
- Load placement. Weight ahead of the axle rides better than piled at the tailgate.
- Moisture. Rained-on sand or soil is hundreds of pounds heavier per yard than the dry figure.
- Securing the load. A tarp and straps — required most places, and cheap insurance everywhere.
Truck bed FAQ
How much gravel can a half-ton pickup carry?
About half a cubic yard by weight. A typical half-ton sticker allows around 1,500 lb of people plus cargo, and gravel runs about 2,800 lb per cubic yard, so 1,500 ÷ 2,800 ≈ 0.54 yd³ — roughly a 5 in layer across a 6.5 ft bed. The bed could physically hold about 2.1 yd³, but weight, not space, is the limit for stone.
How much mulch fits in a pickup truck?
A full-size 6.5 ft bed holds about 2.1 cubic yards level with the rails — but even mulch, at about 800 lb per yard, makes that a 1,712 lb load, slightly over a typical 1,500 lb half-ton payload. Call it about 1.9 yd³ within the sticker. Mulch is the one material where volume and weight limits land close together.
What does "half-ton truck" actually mean?
It is a historic class name from when the trucks carried a nominal 1,000 lb payload. A modern half-ton (F-150, Silverado 1500, Ram 1500 class) typically stickers between about 1,500 and 2,300 lb depending on cab, bed and options — which is why you enter your own sticker number instead of trusting the class name.
Where do I find my truck’s payload rating?
On the yellow-and-white certification label on the driver door jamb: "The combined weight of occupants and cargo should never exceed XXX lb." That number is your payload — and note that it includes the people. Two adults in the cab can take 350–400 lb off what the bed is allowed to carry.
How much does a full truck bed of gravel weigh?
A 6.5 ft bed filled level with the rails is about 2.14 cubic yards, and at 2,800 lb per yard that is roughly 5,992 lb — call it three tons, about four times a typical half-ton payload. A bed of stone that looks full is a suspension, brake and tire problem, which is why the calculator leads with the per-trip number.
Can I haul a cubic yard of topsoil in a pickup?
A yard of topsoil weighs about 2,000 lb. Against a 1,500 lb sticker that is an overload; with a 2,300 lb sticker minus a driver it just fits. At 1,500 lb of payload you can carry 0.75 yd³ per trip, so a yard of topsoil is two trips — or one trip for a properly rated trailer or a delivery.
Does heaping the bed let me carry more?
More volume, yes — the weight limit doesn’t move. Heaping helps with light, bulky material like mulch (crown it modestly and tarp it), but for soil, sand and stone the payload is used up long before the rails, so heaping stone just piles weight you are not rated for. When in doubt, make another trip.
Sources and standards
The volume math is exact; the rating comes off your truck, not this page:
- Payload: the FMVSS certification / tire-loading label on the driver door jamb — occupants count against it.
- Densities: the site-wide loose lb/yd³ figures used by each material’s calculator.
- Volume: length × width × depth ÷ 27 — level fill, no heaping assumed.
- The manual governs: axle, tire and towing limits live in the owner’s manual and on the sticker.
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