Alaskan King Bed vs. King: How Much Bigger Is It?
An Alaskan King bed vs. a King: the Alaskan King (108 × 108 in (274 × 274 cm)) is 32 in wider and 28 in longer than a standard King (76 × 80 in (193 × 203 cm), see King bed dimensions). It has 81 sq ft of surface against 42.2: 92% more, almost double.
Key takeaways. The Alaskan King has 92% more surface than a King. It pays off from three sleepers up: two adults already get 38 in each on a King. Nothing carries over from a King bed, so the frame, sheets and comforter are all bought again in 108 × 108 in. Every dimension of the Alaskan King on its own is in our Alaskan King bed size guide.
Side by side
| King (Eastern King) | Alaskan King | |
|---|---|---|
| Inches | 76 × 80 in | 108 × 108 in |
| Centimeters | 193 × 203 cm | 274 × 274 cm |
| Feet | 6 ft 4 in × 6 ft 8 in | 9 ft × 9 ft |
| Surface | 42.2 sq ft | 81 sq ft |
| Width each, 2 sleepers | 38 in | 54 in |
| Width each, 3 sleepers | 25.3 in | 36 in |
| Width each, 4 sleepers | 19 in | 27 in |
| Min. room (30 in walkways)* | 11.3 × 9.2 ft | 14 × 11.5 ft |
*Our calculation. Width each = mattress width divided by the number of sleepers.
What the extra space means in practice
The difference is less about two adults and more about everyone else. Two adults already get 38 in each on a King. Add a child and each person drops to about 25 in; on an Alaskan King, three people still get 36 in each, close to what two adults have on a King. With four people, the Alaskan King still gives 27 in each.
The extra 28 in of length also matters: on a square 9 ft bed there is room for a child to sleep across the foot of the bed.
The costs of going bigger
- Room: about 14 × 11.5 ft instead of 11.3 × 9.2 ft (our calculation). Check doors and stairs too: will an Alaskan King fit?
- Price: 108 × 108 in mattresses started at $3,300 on the makers' sites on October 5, 2026, frames at $2,300. Ours, shipping included: mattresses from $4,389. The full Alaskan King bed price breakdown has every maker.
- Bedding: nothing from your King bed carries over. Frame, sheets, protector and comforter all have to be bought in 108 × 108 in.
- Is it worth it? The full list of pros and cons: are Alaskan King beds worth it?
Sheets and frame
A King fitted sheet will not stretch 32 in wider. An Alaskan King needs sheets cut for 108 × 108 in, with a fitted-sheet pocket at least as deep as the mattress: our two Alaskan King mattresses are 11 in and 12 in thick.
The frame has to match too. Ours is in aluminum with a headboard (aluminum platform).
Getting it into the bedroom
At 108 in, an Alaskan King is far wider than any doorway, so it travels folded or compressed. The maker of our Alaskan King mattresses states that it ships them folded in half, in one piece, and frames arrive in several boxes. Measure your doors, hallway turns and stairs before you order.
Anything in between?
Yes. If a King is too small but an Alaskan King too big, the square sizes in between are the Wyoming King (84 × 84 in, +16% vs. a King) and the Alberta King (96 × 96 in, +52%). All of them are on the chart of the biggest bed sizes, and the Alaskan King bed guide covers the biggest one in detail.
Other comparisons: Alaskan King vs. California King and Texas vs. Wyoming vs. Alaskan King. For scale, both are tiny next to the biggest bed in the world.