Joining two single beds to make a super king is one of the easiest ways to enjoy the comfort of a large bed without buying an entirely new frame or mattress.
Many couples choose this setup to create extra sleeping space, especially when two single bases are already available.
With the right bridge, mattress topper, and straps, you can transform two standard single beds into a seamless, super-king-sized surface that looks and feels like one luxurious bed.
In this guide, we’ll explain exactly how to do it — from measuring and aligning your frames to choosing the best bed bridge or zip-link connector. You’ll also learn how to remove the gap between mattresses, keep the beds from separating, and select bedding that fits perfectly. Whether you’re upgrading a guest room or creating a cost-effective super king for your own bedroom, this method can save money while delivering comfort and flexibility.
Below you can see the Stratford Zip and Link 1000 Pocket Memory Sprung Divan Bed Set. It comes with two mattresses connected together with a zip. While the two divan bases are connected with linking bars. It is priced at only £809.95, and includes two divan bases and two mattresses.
How Big is Two Single Beds Together?
If you join two single size beds, you would have a super king size bed according to UK standard bed sizes. This is because in the UK, a standard single bed is 90cm x 190cm. So, pushing two singles together would yield a bed that is 180cm (wide) x 190cm (long).
This is the same width as a super king bed, however keep in mind that it will be 10cm shorter. A super king size bed measures 180cm (wide) x 200cm (long).
Therefore, you can buy two European Single Size beds that measure 90cm wide x 200cm long. This way when you join them they’ll be the exact same size as a super king bed.
- Two single beds joined together: 180cm wide x 190cm long
- King size bed: 150cm wide x 200cm long
- Super King size bed: 180cm wide x 200cm long
So essentially, pushing two single beds together will give you a super king-sized sleeping surface, as opposed to a double or king, as many people often believe. However, don’t forget that it is 10cm shorter!
Main reason why you can’t push two single beds together:
The biggest problem of pushing two single beds together is that there will be a gap between the two mattresses. This won’t be very comfortable, because you will feel the gap when you lay in the middle of the mattress.
Overall, the gap in the middle of the sleep surface might lead to a poor night sleep, and in some cases back pain.
One solution would be to buy a “Zip and Link” mattress, which is basically two single size mattresses connected together using a strong zipper. Check our guide on what is a “Zip and Link bed” to learn more.
Mattress topper to join two single beds
You can use a mattress topper to join two single bed, however it needs to measure 180cm wide x 190cm long. You will need to purchase a custom size mattress topper, because if you use a super king size one it will be 200cm long and it will stick out by 5cm at the headend and 5cm at the foot-end of the bed (total of 10cm). This is especially true for memory foam mattress toppers.
However, you may want to try getting a super king size mattress enhancer or topper made of polycotton or feather down.
For example, the Dorma Full Forever Mattress Topper is 3cm or 6cm thick and is priced at £90 for a super king size.
Since it’s thinner, you can tuck the extra 10cm between the mattress and headboard and footboard.
Plus if you’re using a mattress protector and fitted sheets, it will help keep the mattress topper in place and keep the extra 10cm hidden.
Overall adding a mattress topper or enhancer will add an additional comfort layer and make the sleep surface even.
Use a Bed Bridge or Bed Connector
A Bed Bridge is a cushion or pad specifically designed to fill the gab between the two single size mattresses. It comes with straps, which hold the bridge and two mattresses in place securely. They are usually made of memory foam and can fit very well between the two mattresses, thanks to their “V-shape”.
Overall this is a cheap fix that many homeowners can try. Plus it takes only a few minutes to set it up. Some are extra wide and will cover the gap quite effectively.
Pros and cons of joining two single beds together:
Buying a new bed or mattress can be a big expense, so it’s worth weighing up the advantages and disadvantages of joining two single beds to make a super king. If the drawbacks seem greater than the benefits, it might be better to invest in a dedicated king or super king size bed instead.
Pros
1. Cost-effective solution
In some cases, two single beds can be more affordable than purchasing one large king or super king bed — especially if you already own one or both frames. Just make sure to compare the full cost of both options, including mattresses, connectors, and bedding, before deciding.
2. Flexible setup
This arrangement is ideal for guest rooms or multipurpose spaces. You can easily separate the beds for two individuals or push them together for couples, making it a practical and versatile choice.
3. Personal comfort preferences
If one sleeper prefers a firm mattress and the other likes something softer, joining two singles allows both partners to enjoy their ideal comfort level — without compromising or sleeping apart.
Cons
1. Potential discomfort
The small gap between the two mattresses can be noticeable, particularly if you move towards the centre during the night. A bed bridge or mattress topper can help create a smoother sleeping surface, but it may not feel exactly like one solid mattress.
2. Slightly shorter length
Two standard singles side by side measure 180 cm wide × 190 cm long, which is 10 cm shorter than a UK super king (180 cm × 200 cm). If you’re tall, that shorter length could make a difference.
3. Less aesthetic appeal
From a design perspective, a single super king bed with a unified headboard tends to look more elegant than two separate frames. Joined singles can appear less cohesive unless carefully dressed with matching bedding and a shared headboard.
4. Extra setup and maintenance
It can take more time to make the bed and ensure the two frames stay aligned. You’ll need to connect them using metal joining brackets or straps to prevent movement during use.
With the right accessories — such as a bed bridge, mattress topper, and linking brackets — you can minimise most of the drawbacks and enjoy a spacious, comfortable super-king-sized bed setup at a fraction of the cost.
Conclusion:
Ultimately, it’s up to you whether or not you should push two single beds together. It’s an attractive option if you’re looking for greater flexibility in your spare or kids’ bedroom, as you can move them apart as and when you choose.
Equally, if you and your partner have different mattress preferences, you may find that two single beds pushed together is the ideal solution for you.
Our last tip is to shop for a mattress that comes with a home sleep trial. This means that you have 100-200 nights to test and sleep on your new mattress at home, and if for some reason you’re not comfortable you can return it and get a full refund.
Disclosure – top10mattressinabox.co.uk independently reviews and ranks products, by thoroughly researching them. We may receive a commission when a purchase is made through our links, at no cost to our readers. Prices mentioned on this post are accurate as of 9 October, 2025.
