Mattress Size Converter
Compare mattress sizes between US, UK, EU, and Australian standards.
Shows exact width and length in both inches and centimeters for all common mattress types.
Select a mattress size from any region to see its dimensions and closest equivalents.
Mattress Dimensions
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Mattress sizes vary significantly between the US, UK, and EU. A “Queen” in the US is not the same as a “King” in the UK, even though they are similar sizes.
US mattress sizes:
| Name | Width x Length (inches) | Width x Length (cm) |
|---|---|---|
| Crib | 28 x 52 | 71 x 132 |
| Twin | 38 x 75 | 97 x 190 |
| Twin XL | 38 x 80 | 97 x 203 |
| Full/Double | 54 x 75 | 137 x 190 |
| Queen | 60 x 80 | 152 x 203 |
| King | 76 x 80 | 193 x 203 |
| California King | 72 x 84 | 183 x 213 |
UK mattress sizes:
| Name | Width x Length (inches) | Width x Length (cm) |
|---|---|---|
| Small Single | 30 x 75 | 76 x 190 |
| Single | 36 x 75 | 91 x 190 |
| Small Double | 48 x 75 | 122 x 190 |
| Double | 54 x 75 | 137 x 190 |
| King | 60 x 78 | 152 x 198 |
| Super King | 72 x 78 | 183 x 198 |
EU (IKEA/Continental) mattress sizes:
| Name | Width x Length (cm) | Width x Length (inches) |
|---|---|---|
| Single | 90 x 200 | 35 x 79 |
| Double | 140 x 200 | 55 x 79 |
| King | 160 x 200 | 63 x 79 |
| Super King | 180 x 200 | 71 x 79 |
Key differences between systems:
- EU mattresses are typically 200 cm (79 inches) long, which is slightly shorter than US mattresses at 203 cm (80 inches).
- A US Queen (60 x 80 in) is very close to a UK King (60 x 78 in) but 2 inches longer.
- A US King (76 x 80 in) is wider than a UK Super King (72 x 78 in) but the UK version is shorter.
- EU sizes use round centimeter numbers (90, 140, 160, 180 cm widths), making them easy to remember.
Practical tips when shopping across regions:
- Sheets and bedding are sized to match each region’s standards, so always check dimensions rather than relying on size names.
- If you buy a mattress from a different region, you may need custom-sized sheets.
- Always measure your bed frame before ordering a mattress from another country.
- IKEA uses EU sizing worldwide, even in their US and UK stores, so their mattresses may differ slightly from local standards.