King Mattress Size Australia: How Much Space Do You Need?
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If you’ve ever woken up at the edge of the bed because your partner rolled over — or because your dog somehow ended up sleeping sideways — you’ve probably wondered whether it’s time for a bigger mattress.
For many Australian households, upgrading to a king mattress is the ultimate solution for better sleep space and comfort. But before you invest in one, it’s important to understand the king mattress size in Australia, how much bedroom space you’ll need, and whether it’s the right choice for your lifestyle.
In this guide, we’ll break down the exact king mattress dimensions in Australia, who it’s best suited for, and how to make sure your bedroom can comfortably accommodate it.
What Is the King Mattress Size in Australia?
The standard king mattress size in Australia measures:
183 cm × 203 cm
(approximately 6'0" × 6'8")
Compared with other mattress sizes, the king bed provides significantly more sleeping space.
Here’s how it compares:
| Mattress Size | Dimensions (cm) | Best For |
|---|---|---|
| Double | 138 × 188 | Single sleepers or compact rooms |
| Queen | 153 × 203 | Couples |
| King | 183 × 203 | Couples who want maximum space |
The biggest difference between queen and king mattress sizes is the extra 30 cm of width, which can make a noticeable difference if you share the bed.
That additional space allows each sleeper to move more freely during the night without disturbing the other.
How Much Bedroom Space Do You Need for a King Bed?
A king mattress may sound appealing, but it’s important to ensure your bedroom has enough space to accommodate it comfortably.
Interior designers typically recommend leaving at least 60–75 cm of walking space around the bed.
For a king mattress, the ideal bedroom size is:
3.6 m × 3.6 m or larger
This allows enough room for:
- Bedside tables
- Walking space
- Wardrobes or storage furniture
If your bedroom is smaller than this, a queen mattress might be a more practical option.
However, if your room is spacious, a king bed can dramatically improve both comfort and visual balance in the room.
Who Should Choose a King Mattress?
While the king bed is often seen as a luxury option, it’s actually very practical for certain sleeping situations.
Couples Who Want Personal Space
One of the most common reasons people upgrade to a king mattress is simply more sleeping room.
Each person effectively gets the width of a single mattress, which means fewer disturbances during the night.
If you or your partner:
- Toss and turn
- Spread out while sleeping
- Prefer more personal space
A king mattress can make a noticeable difference in sleep quality.
Families With Kids
If you’re a parent, you probably know that kids sometimes climb into bed in the middle of the night.
A king bed size in Australia provides enough space for occasional family cuddles without everyone feeling cramped.
This is especially helpful for:
- Weekend mornings
- Reading bedtime stories
- Comforting children during the night
Couples Who Sleep With Pets
In many Australian homes, pets are part of the family — and often part of the bed too.
If your dog or cat regularly sleeps with you, mattress size becomes even more important.
A king mattress size in Australia (183 × 203 cm) provides significantly more room than a queen bed, making it easier for couples and pets to share the space comfortably.
Large dogs in particular tend to stretch out across the bed, which can quickly eat up sleeping space. With a king mattress, there’s far less chance of waking up squeezed against the edge of the bed while your pet enjoys the middle.
For households with big dogs or multiple pets, the king mattress often becomes the most practical choice.
King Mattress vs Queen Mattress
Many people debating bed sizes are actually choosing between queen and king mattresses.
Here’s the key difference:
| Mattress Size | Width | Length |
|---|---|---|
| Queen | 153 cm | 203 cm |
| King | 183 cm | 203 cm |
The length is the same, but the king mattress provides 30 cm more width.
That extra width can make a big difference if:
- Both sleepers move during the night
- One partner is a light sleeper
- Pets or children occasionally join the bed
However, if your bedroom is smaller, a queen mattress might still be the better fit.
You can also compare all Australian mattress sizes in our complete guide:
👉 Bed Mattress Size Guide Australia
King Mattress vs Super King: What’s the Difference?
If you’re already considering a king bed, you might also come across the super king mattress size in Australia. At first glance the names sound similar, but the difference in size can be significant.
Here’s how they compare:
| Mattress Size | Dimensions (cm) | Best For |
|---|---|---|
| King | 183 × 203 | Couples wanting more personal space |
| Super King | 203 × 203 | Very large bedrooms and maximum sleeping space |
A super king mattress is 20 cm wider than a king, giving sleepers even more room to stretch out. The length stays the same, but that additional width can feel noticeably more spacious.
However, choosing between a king mattress size in Australia and a super king usually comes down to one key factor: bedroom space.
A super king bed works best in very large bedrooms where there is still plenty of walking space around the bed. Without enough room, the mattress can dominate the entire layout and make the room feel cramped.
For most Australian homes, a king mattress strikes the ideal balance between generous sleeping space and practical room layout. It’s large enough for couples, families, and even pets, while still fitting comfortably in many standard master bedrooms.
If your bedroom is particularly spacious and you want the largest standard mattress available, a super king may be worth considering. Otherwise, the king mattress remains one of the most popular and versatile choices for Australian sleepers.
Will a King Mattress Fit Your Bedroom Layout?
Even if your bedroom technically fits a king mattress, layout still matters.
Before purchasing a king bed, consider:
- Door swing clearance
- Wardrobe doors
- Bedside table placement
- Walkways around the bed
A quick way to visualise the space is to measure and mark the mattress outline on the floor using tape.
This simple step helps you understand how much space the bed will occupy and whether the room will still feel comfortable.
Is a King Mattress Worth It?
For many sleepers, upgrading to a king mattress significantly improves comfort.
The biggest benefits include:
More personal space
Couples can sleep without disturbing each other as much.
Better sleep quality
More room to move naturally throughout the night.
Ideal for shared sleeping situations
Kids and pets can occasionally join the bed without overcrowding it.
However, it’s important to balance comfort with practicality. If your bedroom is small, a queen mattress may offer a better overall layout.
King Mattress Buying Tips
If you decide that a king mattress is the right choice for your home, here are a few helpful tips before buying.
Measure Your Room Carefully
Always measure the room and leave enough clearance around the bed.
Consider Your Bed Frame
Make sure your bed frame is designed for an Australian king mattress size.
Think About Mattress Support
A larger mattress benefits from strong support layers that maintain comfort across the entire surface.
High-quality mattresses often combine multiple foam or support layers to balance pressure relief and durability.
Explore Onebed King Mattresses
If you’ve decided that a king mattress is the right fit for your bedroom, exploring high-quality options is the next step.
You can view the full range of king size mattresses here:
👉 King Size Mattresses Collection
Onebed offers several mattress designs created to suit different sleep preferences.
Onebed Essential
The Onebed Essential mattress provides balanced comfort and support, making it a practical option for everyday sleepers who want reliable pressure relief without unnecessary complexity.
Onebed Original
The Onebed Original is one of the most popular choices thanks to its multi-layer foam construction designed to balance softness, cooling, and support. It adapts well to different sleeping positions, making it suitable for couples with different comfort preferences.
Onebed Max
For sleepers who want enhanced support and durability, the Onebed Max offers a more advanced structure designed to provide stability across the entire mattress surface — ideal for larger beds like king size.
With the extra space provided by a king mattress, choosing a well-designed mattress can make a noticeable difference in overall sleep comfort.
FAQ
What is the king mattress size in Australia?
The standard king mattress size in Australia measures 183 cm × 203 cm. It offers significantly more width than a queen mattress, making it a popular choice for couples who want extra sleeping space.
Is a king mattress bigger than a queen?
Yes. A king mattress is 30 cm wider than a queen mattress, while both share the same length of 203 cm. This additional width provides more personal space for couples, which can improve overall sleep comfort.
What room size is best for a king mattress?
For a king bed size in Australia, experts typically recommend a bedroom of at least 3.6 m × 3.6 m. This allows enough space for bedside tables and comfortable walking space around the bed.
Is a king mattress good for couples with pets?
Yes. Many couples choose a king mattress because it provides enough room for both sleepers and pets. Larger dogs or multiple pets can quickly take up space on smaller beds, so the additional width of a king mattress can make sleeping more comfortable for everyone.
Is a king mattress worth it?
If your bedroom has enough space, a king mattress can significantly improve sleep comfort. The larger sleeping surface allows couples to move freely during the night without disturbing each other as much.
Final Thoughts
The king mattress size in Australia (183 × 203 cm) is the largest standard mattress available and offers generous sleeping space for couples, families, and even pets.
While it requires a larger bedroom, the additional width can significantly improve sleep quality by giving everyone more room to relax.
If your bedroom layout allows for it, upgrading to a king mattress can transform your sleep experience — especially if you share the bed with a partner, kids, or a four-legged companion.
