When we talk about putting 2 single beds together, the most common mistake is ignoring the length. In Australia, mattress dimensions are standardised, but there are variations you need to know:
Can I Put 2 Single Size Beds Mattresses Together?
MAR 13, 2026
Last updated: MAR 13, 2026
270 views, 4 mins read
"Can I just put two single mattresses on this?" The short answer is: Yes, but with a catch. While it’s a brilliant hack for couples with different firmness preferences or families hosting guests, the standard Australian Single is too short for a King frame.
To make it work seamlessly without a massive gap at the foot of the bed, you actually need two "Long Singles."
In this guide, we’ll break down the math, and the pro tips to ensure your DIY King bed doesn’t feel like two separate islands.
In this article
What is the size of 2 single beds together?
- Standard Single: 92 cm x 188 cm
- Long Single: 92 cm x 203 cm
- Standard King: 183 cm x 203 cm
If you push two Standard Singles together, the width (184 cm) is almost identical to a King, but you will be left with a 15 cm gap at the end of the frame.
This is why we recommend using two Long Singles. When you combine them, the total 2 single beds together size becomes 184 cm x 203 cm—a near-perfect match for a standard King bed frame.
Tips
- Ensure the heights of both mattresses match is equally critical to prevent a "cliff" in the middle of the bed.
Why combine two single beds together?
Why go through the trouble of syncing up two mattresses instead of just buying a King? The reasons are more practical than you might think.
First, there is the 'Partner Disturbance' factor. If one person is a 'starfish' sleeper and the other is a 'log,' having two separate mattress cores means motion won't travel across the bed.
Second, Firmness Customisation is a game-changer. You might prefer the medium-soft feel of the Newentor Hybrid Mattress Pro, while your partner needs the 7-zone orthopedic support of a firmer hybrid. By putting 2 long single beds together, nobody has to compromise.
However, it is often difficult to get the heights of two different mattresses to match perfectly.
To solve this, we recommend buying two of the same Long Single mattresses that allow you to adjust the firmness by simply rearranging the internal memory foam layers—such as the Newentor Hesperis. This way, you can ensure both sides stay at the exact same height while still customizing the firmness level for each person.
Lastly, it’s about logistics. Maneuvering a one-piece King mattress up a narrow staircase or into an apartment lift is a nightmare. Two singles? Easy. It’s the ultimate "life hack" for renters or people living in older Australian homes with tight hallways.
How to combine 2 single mattresses?
Simply pushing the frames together isn't enough; they will eventually slide apart, leaving a "canyon" in the center. Here is how to do it properly:
Step 1. Secure the Frames
Use heavy-duty zip ties or specialized bed connectors to lock the legs of the two frames together.
Step 2. Purchase a "bed bridge"
Actually, it's a T-shaped foam wedge. It fills the gap between the mattresses, creating a flush surface.
Step 3. Use the Mattress Topper
This is the secret sauce. Placing a single King-sized mattress topper over both 2 long single beds together masks the seam entirely. It makes the bed feel like one cohesive unit while retaining the motion-isolation benefits below.
Step 4. King Bedding
Use a King-sized fitted sheet to wrap around both mattresses. This tension helps keep the mattresses from shifting outward during the night.
FAQs
Can I put two single mattresses on a king frame?
Yes, but with a caveat. Two Australian Long Singles (92 x 203 cm) fit a King frame perfectly. However, standard Singles (92 x 188 cm) are 15 cm shorter, leaving a gap at the foot. To ensure comfort, use a "bed bridge" to fill the center seam and a King-sized topper for a seamless surface.
Is it uncomfortable in the middle?
Not if you use a high-quality bed bridge and a topper. Without them, you will definitely feel the "trench."
Can I use different brands?
Yes, as long as the heights (profile) are identical. If one is 25 cm thick and the other is 30 cm, you’ll have an uneven sleeping surface.
Bottom Lines
Creating a King bed by putting 2 single beds together is a smart, flexible solution for modern Australian homes. It solves the struggle of differing comfort needs and makes moving day a breeze.
If your bed frame is a King size, I highly recommend getting 2 Long Single mattresses, as their combined size is 184cm x 203cm.
By using a bed bridge and a quality topper, you can enjoy the luxury of a King bed with the practical benefits of two separate units.
Ready to stop compromising on your sleep? Measure your room and start building your perfect split-king setup today.
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270 views, 4 mins read