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Measure before you buy
Start with your room, then check whether a bed leaves enough walking space.
King — 76 × 80 in
Flat sheet: allow enough width for the mattress top, both side drops and your preferred tuck. This first fit checker does not calculate fabric or sewing allowances.
Bedding-fit result
Enter the mattress depth and item dimensions to check fit.
No bedding result yet.
This is a dimension check, not a brand guarantee. Elastic, seam construction, shrinkage, bed-frame height and personal drop preference vary.
United States · standard and specialty
Mattress width comes first. Dimensions are nominal retail sizes; individual makers can vary by about an inch.
One scale · width × length
Every outline uses the same scale
Crib / Toddler28 × 52 in
Twin38 × 75 in
Twin XL38 × 80 in
Full / Double54 × 75 in
Full XL54 × 80 in
Queen60 × 80 inSplit Queen shares this footprint
Olympic Queen66 × 80 in
King76 × 80 inSplit King shares this footprint
California King72 × 84 inSplit Cal King shares this footprint
Wyoming King84 × 84 in
Texas King80 × 98 in
Alaskan King108 × 108 in
| Size | Inches | Centimetres | Area | Suggested room | Best for | Use in comparison |
|---|---|---|---|---|---|---|
| Crib | 28 × 52 | 71 × 132 | 10.1 ft² | — | Infants 0–18 months | |
| Toddler | 28 × 52 | 71 × 132 | 10.1 ft² | — | Ages 18 months–5 years; crib footprint | |
| Twin Single | 38 × 75 | 96.5 × 190.5 | 19.8 ft² | 7 × 10 ft | Kids, solo sleepers, bunks | |
| Twin XL | 38 × 80 | 96.5 × 203 | 21.1 ft² | 8 × 10 ft | Tall solo sleepers, college dorms | |
| Full Double | 54 × 75 | 137 × 190.5 | 28.1 ft² | 9 × 10.5 ft | Solo adults; snug for two | |
| Full XL | 54 × 80 | 137 × 203 | 30 ft² | 9.5 × 10.5 ft | Taller solo sleepers, dorms | |
| Queen | 60 × 80 | 152.5 × 203 | 33.3 ft² | 10 × 10 ft | Couples; spacious for one | |
| Olympic Queen Specialty | 66 × 80 | 167.5 × 203 | 36.7 ft² | 10 × 10 ft | Extra width for couples; some RVs | |
| Split Queen Specialty | 60 × 80 | 152.5 × 203 | 33.3 ft² | 10 × 10 ft | Adjustable bases; two 30 × 80 halves | |
| King Eastern King | 76 × 80 | 193 × 203 | 42.2 ft² | 12 × 12 ft | Couples wanting maximum width | |
| California King Western King | 72 × 84 | 183 × 213.5 | 42 ft² | 12 × 12 ft | Tall sleepers; long, narrow rooms | |
| Split King | 76 × 80 | 193 × 203 | 42.2 ft² | 12 × 12 ft | Two Twin XLs; independent sides | |
| Split California King Specialty | 72 × 84 | 183 × 213.5 | 42 ft² | 12 × 12 ft | Independent adjustable 36 × 84 sides | |
| Wyoming King Specialty | 84 × 84 | 213 × 213 | 49 ft² | 12 × 12 ft | Oversized; couples with kids or pets | |
| Texas King Specialty | 80 × 98 | 203 × 249 | 54.4 ft² | 12 × 14 ft | Very tall sleepers; longest specialty size | |
| Alaskan King Specialty | 108 × 108 | 274 × 274 | 81 ft² | 16 × 16 ft | Whole-family co-sleeping; largest size |
Specialty Standard frames and bedding may be hard to find. Room sizes are practical guidance, not building rules.
Same name, different mattress
US names are not universal. Use the grouped First and Second bed selectors to compare markets directly.
Worked example
A King (76 × 80 in / 193 × 203 cm) is 16 inches wider than a Queen (60 × 80 in / 152.5 × 203 cm) — about 8 inches more per person and 27% more mattress area, at the same length.
In an empty 12 × 12 ft room the King mattress footprint leaves ~34 in on each side and 64 in at the foot. In 10 × 10 ft, the narrowest gap is ~22 in — below the 24 in walking-clearance guidance, before adding a frame, doors or furniture.
One-minute check
Straight answers
In the US, Queen (60 × 80 in / 152.5 × 203 cm) — roughly half of all mattresses sold. It suits couples and solo sleepers who want room; its mattress footprint has comfortable empty-room clearance in a 10 × 10 ft room.
A King is 16 in wider (76 vs 60), the same 80 in long — about 8 in more shoulder room per person and ~27% more area. It needs a wider room (12 ft+). Compare them to scale above.
Almost the same area. A standard King is 4 in wider; a California King is 4 in longer (better for sleepers over 6 ft and for long, narrow rooms).
Aim for about 24–30 in of open walking space on each usable side. A Queen mattress footprint is commonly guided toward ~10 × 10 ft; a King toward ~12 × 12 ft. Fit a room estimates an empty rectangle with the mattress centered at one wall—it does not model the frame, doors or furniture, so measure those before buying.
No. A UK King (150 cm) is narrower than a US King (193 cm) — closer to a US Queen. An EU King (160 cm) sits between them, and an AU King (183 cm) matches a US California King's width. Choose them directly in the two grouped selectors to compare.
For a fitted sheet, the package width × length should claim the mattress size within about 1 inch, and its pocket must reach the mattress plus topper depth. For a comforter or duvet, compare the calculated side and foot drop. Always check the maker's label.
Yes. Choose Custom measurements for either bed, enter its width and length in inches or centimetres, and use that same bed in Room-fit or Bedding-fit. Custom measurements do not infer how many people sleep on the mattress.
Method
Last reviewed July 22, 2026. Dimensions are cross-checked against mattress makers and standards bodies (ISPA in the US, NBF in the UK, plus IKEA and Australian retailers). Sizes are nominal and actual products can vary by about an inch. Bedding is less standardized: US figures are shopping suggestions only; elsewhere, use exact dimensions and verify the maker. Room fit uses only the mattress footprint in an empty rectangle. Calculations stay in your browser; valid settled settings may be saved locally for restore or placed in a share URL, and are not uploaded by this tool.