U‑Haul trailer size guide
U‑Haul 6x12 cargo trailer dimensions: inside size and what fits
For small loads
The U‑Haul 6' x 12' Cargo Trailer holds 33 of the 36 items on our studio list: good for a few large pieces or a small load.
- Inside (L × W × H)
- 11'7" × 6'0" × 5'3"
- Door opening
- 5'0" × 4'10"
- Room inside
- 365 cu ft
- Biggest home that fits
- A few large items
Room inside is length × width × height of the cargo box; U‑Haul quotes 396 cu ft, measured its own way.
Which home sizes fit
Doesn't fit (6 home sizes)
Each home size is a typical furniture list plus the box counts from a moving guide. Our packing fills about 70–80% of a truck; a careful pro load fits more.
Will big items fit?
Tightest fits first. Headroom is the space left above it as loaded; at the door is the clearance getting it in.
| Item | How it goes in | Headroom | At the door |
|---|---|---|---|
 King mattress | Won't fit: Won't go through the door opening (5'0" wide × 4'10" high), even tilted. | – | – |
 Refrigerator, French-door | Won't fit: Too big for the door opening (5'0" wide × 4'10" high) while kept upright (5'10" tall). It would have to be laid down to get in. | – | – |
 Queen mattress | standing on its long edge | 3" | 0" |
 Upright piano | standing upright | 1'3" | 10" |
 Washer | standing upright | 1'7" | 1'2" |
 Treadmill | Taken apart, standing on end | 1'7" | 1'4" |
 65" TV in its box | standing upright | 2'2" | 1'9" |
 3-seat sofa | standing upright | 2'2" | 1'9" |
 Sectional: chaise section | standing upright | 2'2" | 1'11" |
 6-drawer dresser | standing upright | 2'8" | 2'5" |
Inside size and where each number comes from
| Measure | Size and source |
|---|---|
| Inside length | 11'7" (353 cm) Confirmed · 2 sources |
| Inside width | 6'0" (183 cm) Confirmed · 2 sources |
| Inside height | 5'3" (160 cm) Not yet confirmed |
| Door width | 5'0" (152 cm) Other site, unconfirmed |
| Door height | 4'10" (147 cm) Other site, unconfirmed |
| Volume (brand's figure) | 396 cu ft Confirmed · 2 sources |
| Max load | 2,480 lb Confirmed · 2 sources |
Measured against U‑Haul's page. Rental fleets vary by model year, so plan for a little less room than this. Wrong size? Tell us.
Notes on these numbers
SOURCE CAVEAT: every uhaul.com fetch returned ECONNRESET; all values come from WebSearch results that quote uhaul.com pages (the search tool returns a summarized answer with quoted fragments, not the raw page), so check asWritten punctuation against the live page before publishing. U‑Haul states all rental truck and trailer measurements are approximate. No numeric deck height published (only 'lowest deck'). No ramp on the enclosed cargo trailer (ramps are on the 6x12 utility trailer with ramp). Business page disagrees: inside height 5'5", door 5'0" x 4'10". A U‑Haul tips page rounds volume to about 400. U‑Haul's equipment-designations PDF lists 3,450/3,900 lbs, which is a tow-vehicle limit, not cargo capacity. Empty weight 1,920 lbs; max combined weight 4,400 lbs. Cross-check 29 Oct 2026, inside.height: All independents (and U‑Haul's own business page) give the older spec set; only the product-page snippet has ours. Possibly a newer trailer model, unverified. Cross-check 29 Oct 2026, door.width: All independents (and U‑Haul's own business page) give the older spec set; only the product-page snippet has ours. Possibly a newer trailer model, unverified. Used the smallest current value (5'0") instead of 5'4". Cross-check 29 Oct 2026, door.height: All independents (and U‑Haul's own business page) give the older spec set; only the product-page snippet has ours. Possibly a newer trailer model, unverified. Used the smallest current value (4'10") instead of 5'1".
Loading tips for this trailer
- The door is 4'10" high but the inside is 5'3": tall furniture has to be tilted to get in, then stood up.
- The floor is flat (no wheel wells inside), so the full width is usable all the way back.
- Load heavy furniture and appliances first, against the cab wall, and boxes last on top.
Every U‑Haul size side by side, and which one fits your home: U‑Haul truck sizes.
Compare
| Compared with | Difference | Biggest home |
|---|---|---|
| U‑Haul 5' x 8' Cargo Trailer | 3'7" shorter, 178 cu ft less room | A few large items |