Will a king mattress fit in a U‑Haul 4' x 8' Cargo Trailer?

Q: Will a king mattress fit in a U-Haul 4' x 8' Cargo Trailer?

No. A king mattress doesn't fit in the U-Haul 4' x 8' Cargo Trailer: won't go through the door opening (3'1" wide × 3'5" high), even tilted.

By the Every Last Box teamSizes checked October 29, 2026How we measure How we make money

Won't fit

No, it won't fit.

A king mattress doesn't fit in the U‑Haul 4' x 8' Cargo Trailer: won't go through the door opening (3'1" wide × 3'5" high), even tilted.

King mattress: 6'8" × 6'4" × 11"
Truck inside: 8'1" × 4'1" × 4'0"
Door opening: 3'1" × 3'5"

It does fit in the Penske Cargo Van (High-Roof) and the Budget 12' Small Truck.

King mattress in the U-Haul 4' x 8' Cargo Trailer: doesn't fit (it waits behind the truck) — King mattress in the U‑Haul 4' x 8' Cargo Trailer: doesn't fit (it waits behind the truck). Packed by our planner, with a 1.75 m (5'9") person for scale.

Add the rest of your furniture

The numbers

King mattress	6'8" (203 cm) × 6'4" (193 cm) × 11" (28 cm)
U‑Haul 4' x 8' Cargo Trailer inside	8'1" (246 cm) × 4'1" (125 cm) × 4'0" (122 cm)
Door opening	3'1" (94 cm) × 3'5" (104 cm)

Item size: a common model, from Sleep Foundation. Real products vary, so measure yours if it is unusually big. Truck size from its page. You can add your own size in the planner.

How to load it

Put it in a mattress bag first; standing it on its edge keeps it from being crushed.

King mattress in other trucks, vans and trailers

Penske Cargo Vanstanding on its short endOn end

Budget 12'leaning at 35° against the side wall; tilt it through the doorLeans

U‑Haul 10'leaning at 34° against the side wall; tilt it through the doorLeans

Penske 12'lying flatLies flat

Budget 16'standing on its long edgeOn edge

Penske 16'standing on its long edgeOn edge

U‑Haul 15'standing on its short endOn end

U‑Haul 20'standing on its short endOn end

Penske 22'standing on its short endOn end

Penske 26'standing on its short endOn end

Budget 26'standing on its short endOn end

U‑Haul 26'standing on its short endOn end

U‑Haul 29'standing on its short endOn end

Doesn't fit (6 vehicles)

U‑Haul 8' PickupBigger than the inside (7'10" × 5'1" × 1'9").No

U‑Haul 5' x 8' Cargo TrailerWon't go through the door opening (3'11" wide × 4'10" high), even tilted.No

Enterprise Cargo VanBigger than the inside (10'6" × 4'7" × 4'8").No

Budget Cargo VanBigger than the inside (11'0" × 4'5" × 5'0").No

U‑Haul 9' Cargo VanWon't go through the door opening (5'1" wide × 4'1" high), even tilted.No

U‑Haul 6' x 12' Cargo TrailerWon't go through the door opening (5'0" wide × 4'10" high), even tilted.No