How to Convert European Mattress Sizes to UK
If you have an EU-sized mattress and need to use it with UK bed frames or bedding, direct conversion is rarely exact because EU double measures 140x200cm while a UK double is 135x190cm. The practical approach is to identify the closest UK equivalent, check physical compatibility on your frame, and choose UK-sized replacements where needed for a proper fit.
UK vs EU Mattress Size Comparison
UK mattress sizes follow these exact dimensions: small single 75x190cm (2ft6), single 90x190cm (3ft), small double 120x190cm (4ft), double 135x190cm (4ft6), king 150x200cm (5ft), super king 180x200cm (6ft). EU sizes differ, for example an EU single is typically 90x200cm and an EU double 140x200cm. Cot mattresses are commonly 60x120cm while cot bed or toddler sizes are 70x140cm. These 5-10cm differences in width and length affect how the mattress sits inside a UK bed frame and whether standard UK sheets and duvets will fit.
| UK Size | Dimensions | Closest EU Equivalent | Compatibility Notes |
|---|---|---|---|
| Single | 90x190cm (3ft) | EU single 90x200cm | Length overhang of 10cm; check frame ends |
| Double | 135x190cm (4ft6) | EU double 140x200cm | 5cm wider and 10cm longer; may not sit flush |
| King | 150x200cm (5ft) | EU king 160x200cm | 10cm narrower; good length match |
| Super King | 180x200cm (6ft) | EU super king 180x200cm | Exact match on most dimensions |
Practical Steps to Convert Your EU Mattress to a UK Bed
Measure your existing EU mattress and the internal dimensions of your UK bed frame to the nearest centimetre. Compare against the UK sizes listed above. If the EU mattress is longer than 190cm it will usually protrude at the foot of a standard UK frame; if wider it may not drop fully into wooden or metal sides. Use this decision rule: if the difference is under 3cm in any direction the mattress can often be used with minor adjustment; over 5cm requires a new UK-sized mattress for safety and appearance.
A checklist for compatibility includes:
- Confirm the UK bed frame follows BS EN 747 for bunk beds if applicable, ensuring top-bunk guard rails rise at least 16cm above the mattress surface using the maximum depth stated by the maker.
- Check that both the mattress and any upholstered base meet UK fire-safety rules under the Furniture and Furnishings (Fire) (Safety) Regulations 1988 and BS 7177.
- Measure headboard to footboard clearance and side rail gaps.
- Test that the mattress does not compress unevenly or create gaps.
For a straightforward swap, browse our range of bed frames that clearly list internal measurements on each product page.
When to Replace Your EU Mattress with a UK Size
Replacement is usually the cleanest solution. A UK king size mattress at 150x200cm offers a close match for many EU king setups while fitting standard UK king size beds. Opt for models such as those from Maxitex or Recoil that are built to exact UK dimensions so sheets and protectors fit without bunching. If your current EU mattress is a memory foam or latex type, you can keep the comfort by adding a mattress topper on a new UK base, but always verify the topper does not exceed the frame’s depth limit.
King Size Solutions
UK king beds (150x200cm) are widely available and provide a practical upgrade from narrower EU doubles. See our king size beds selection for wooden, metal and upholstered frames that accept standard UK king mattresses. Pair them with a king size mattress from Flair, Solace+Co or Maxitex for exact fit.
Bedding and Accessory Adjustments
EU mattress length of 200cm means UK duvets and sheets designed for 190cm can ride up. Choose king or super king bedding to gain extra coverage. Our duvets and duvet covers & sets are stocked in sizes that work with both UK and converted EU setups. Mattress protectors are essential when switching sizes to guard against movement and dust; check the mattress protectors range for UK-specific cuts.
Children’s and Special Sizes
For children moving from EU cot beds (70x140cm) to UK single beds, the jump to 90x190cm is significant. A Noomi or Maxitex kids mattress in UK single size provides the correct length while maintaining firmness suitable for growing frames. All bunk beds sold in the UK must meet BS EN 747; never exceed the manufacturer’s maximum mattress depth on the top bunk so the guard rail remains at least 16cm above the sleep surface. See our kids’ beds for compliant single and storage options.
Ottoman and Storage Bed Considerations
Ottoman beds with hydraulic lift mechanisms have fixed internal dimensions. An EU mattress that is 5cm too wide will not close properly. Always select a UK-sized mattress for king size ottoman beds. Maxitex and Recoil models list exact compatibility on the product page so you can confirm before purchase.
Overall, converting means accepting small gaps or overhangs or investing in UK-standard replacements. Measuring twice and checking frame specifications avoids costly mistakes.
Our picks for this guide
- Maxitex Premier Sprung Mattress - Double Continental – This continental double size bridges EU and UK dimensions for users converting from European mattresses while still fitting many UK small double frames.
- Noomi Bamboo Natural Latex Pocket Sprung Mattress – Available in exact UK sizes, this natural latex mattress offers a direct replacement for EU latex mattresses, ensuring compatibility with UK bed frames and bedding.
- Maxitex Diamond Dual Season 1000 Pocket Memory Mattress – A UK king or super king option that matches standard UK dimensions exactly, ideal when replacing an EU-sized memory foam mattress for perfect frame fit.
- Noomi Waterproof Eco Foam Mattress Single – UK single size with waterproof protection, providing an easy swap for EU single mattresses in children’s or guest rooms.
Frequently asked questions
Can I use an EU double mattress on a UK double bed frame?
An EU double (140x200cm) is 5cm wider and 10cm longer than a UK double (135x190cm). It may sit on top but will overhang the sides and foot. Most wooden and metal UK frames cannot accommodate the extra width safely. Replace with a UK double mattress for proper fit and fire regulation compliance.
What is the difference between EU king and UK king size?
A UK king is 150x200cm (5ft). An EU king is usually 160x200cm, making it 10cm wider. The length matches, but the extra width means it will not drop into a standard UK king bed frame. Choose a UK king size mattress from Maxitex or Flair for exact compatibility.
Do I need special sheets for an EU mattress in the UK?
EU mattresses are often 200cm long while UK bedding is cut for 190cm. King or super king sheets and duvets provide better coverage. Deep-fitted sheets are advisable to cope with any height difference. Always measure your specific mattress before buying bedding.
Are continental mattresses compatible with UK ottoman beds?
Continental sizes (often EU dimensions) rarely fit UK ottoman mechanisms because the base is built to strict UK measurements. The lid will not close flush and hydraulic pistons may be strained. Purchase a UK-sized mattress such as the Maxitex range listed for ottoman use.
What size mattress should I buy for a UK single bed if I have EU bedding?
Buy a standard UK single 90x190cm (3ft) mattress. EU single is typically 90x200cm so length differs by 10cm. UK single mattresses from Noomi or Maxitex will fit the bed frame correctly and allow standard UK bedding to be used without excess fabric.