Dump Trailer Sizing Guide: Load Weight Chart & Size Calculator

Pick the wrong dump trailer size and you either overload the axles or pay for capacity you never use. This guide gives you the numbers contractors actually need: material weights per cubic yard, real payload ratings by trailer size, and a calculator that matches your load to the right trailer.

Material weight chart (pounds per cubic yard)

Volume never limits a dump trailer. Weight does. Use these averages to work out what one full load actually weighs. Wet material can run 30–50% heavier than the dry figure.

Material	Approx. lb per cubic yard	Tons per cubic yard
Topsoil, dry	2,000	1.00
Topsoil, wet	2,700	1.35
Sand, dry	2,700	1.35
Gravel (3/4 in.)	2,850	1.43
Crushed concrete	2,400	1.20
Asphalt millings	2,600	1.30
Wet clay	3,000	1.50
Mixed demolition debris	1,100	0.55
Roofing shingles	2,200	1.10
Mulch / wood chips	500	0.25
Green waste, loose	350	0.18
Firewood, split	2,800	1.40

Figures are industry averages for planning. Moisture, compaction and aggregate grading change the real number, so weigh a load at a certified scale before you run at capacity.

Dump trailer sizes and payload capacity

Payload equals GVWR minus the empty weight of the trailer. A 14,000 lb GVWR trailer that weighs 4,200 lb empty carries roughly 9,800 lb of material.

Trailer size	GVWR	Level capacity	Typical payload	Best for
Compact utility (5×8 – 6×10)	7,000 – 9,990 lb	2 – 3 cu yd	3,500 – 6,000 lb	Landscapers, small remodels, single-axle tow vehicles
14ft bumper pull (7×14)	14,000 lb	5 – 7 cu yd	8,500 – 10,000 lb	The all-round contractor size — dirt, gravel, demo debris
16ft bumper pull (7×16)	16,000 lb	7 – 9 cu yd	10,000 – 11,500 lb	Heavier aggregate hauls behind a 3/4-ton truck
Gooseneck (8×20 and up)	21,000 – 25,900 lb	12 – 18 cu yd	14,000 – 19,000 lb	Grading crews, aggregate suppliers, equipment plus material

How to choose in four steps

1. Weigh your heaviest load. Multiply your cubic yards by the material weight above.
2. Add 20% headroom. Sizing to the exact number leaves nothing for wet material or an extra scoop.
3. Check the tow vehicle. Compare trailer GVWR against your truck’s towing capacity and hitch rating, not just its engine.
4. Match the hitch type. Bumper pull to about 16,000 lb; go gooseneck above that for stability and tighter turning.

Bumper pull or gooseneck?

A 14ft bumper pull tows behind any properly rated pickup and handles most dirt, gravel and demolition work. A gooseneck puts the load over the rear axle, so it carries more, tracks straighter at highway speed and backs into tight jobsites more easily. Above 16,000 lb GVWR, gooseneck is the safer answer.

Parts that affect capacity

Jacks, axles and hydraulic components all have their own ratings. A trailer rated at 21,000 lb still needs a jack rated for the tongue weight. Browse A-frame jacks and the full trailer parts catalog when you spec or repair a trailer.

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