King Bed Mattresses

King Bed Frames

King Bed Bases

King Bed Heads

King Bedroom Packages

King Bedroom Suites

King Bed Linen

Super King Mattress

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Shop Affordable King Bed Mattresses

Stretch out and enjoy luxury comfort with a cheap king bed mattress from Factory Buys, perfect for couples or anyone wanting more space to unwind. Each mattress combines premium materials and support systems for superior sleep quality. Explore top picks including latex foam mattresses, pocket spring mattresses, and the full mattresses collection. Customers love the great value for money, durability, and free Australia-wide delivery Factory Buys is known for.

Why Choose a King Mattress

A cheap king bed mattress offers generous space and enhanced comfort, making it ideal for couples or those who value a restful, unrestricted night’s sleep. Factory Buys stocks a wide variety of styles designed to meet every preference, including hybrid mattresses for balanced support and memory foam mattresses for contouring comfort.

Each king mattress is built using high-quality materials that ensure durability and long-term support. Reinforced edges and stable coil structures help prevent sagging and motion transfer, so you and your partner can sleep soundly night after night.

Features and Benefits

Our range of king mattresses includes features suited to Australian conditions and lifestyles:

  • Pocket or innerspring cores for responsive, full-body support.

  • Multiple comfort layers for cushioning without compromising firmness.

  • Breathable, hypoallergenic fabrics to promote a cooler sleep.

  • Edge-to-edge structure for consistent comfort and support.

For sleepers wanting extra firmness, consider our firm mattresses or extra firm mattresses. If you prefer plush softness, explore our euro top mattresses for a luxury hotel-style feel.

Complete Your Bedroom Setup

Pair your new king mattress with a sturdy bed base or stylish bed frame for lasting performance. To protect your investment, add a mattress protector or enhance comfort with a king mattress topper. Complete your space with premium pillows and quilts for a cohesive and comfortable setup.

Factory Buys is proudly Australian owned and operated, providing free delivery on all mattresses. Known for reliability, comfort, and customer satisfaction, our king bed mattresses are the perfect blend of quality and affordability for every Australian home.

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What Size is a King Mattress?

A king-size mattress in Australia is typically 183cm wide by 203cm long. This advanced size offers numerous benefits, especially for couples and families.


The expansive size provides plenty of personal space and support for couples sharing the bed. Many king-size mattresses in our range come with layered support that reduces disturbances from a partner's movements, which is particularly useful for light sleepers. This amount of space is also ideal for families with children who occasionally want to share the bed. With a king-size mattress, there’s always plenty of room for anyone to share.


Visually, a king-size bed often serves as an impressive focal point in any bedroom, adding a sense of grandiose luxury. For those who value size, comfort, and elegance in their bedding, a king-size mattress from Factory Buys is the best choice.


If you’re not sure about which mattress size is the best for you, feel free to look at our handy mattress size guide. 

How Thick Are King Mattresses?

Our king-sized mattresses come in a range of thicknesses, from thin and cooling to thick and luxurious. The thickness levels include: 


  • 10cm - 19cm

  • 20cm - 24cm

  • 25cm - 29cm

  • 30cm - 34cm

  • 35cm - and above

A thick mattress can provide enhanced comfort and support, adapting better to the contours of a person’s body. This means improved sleep quality and reduced pressure on joints, which can be especially beneficial for people with back or hip pain.

A thin mattress offers greater firmness, which can benefit back support and maintain proper spinal alignment. It's also more lightweight and easier to handle, making it ideal for smaller spaces or use in multi-purpose areas like guest rooms or convertible sofa beds. 

What Types of King Mattresses Does Factory Buys Sell?

Soft

Soft but with slight support, it conforms to your body and spine for a comfy sleep. 

Plush

The ultimate comfort, these king-sized plush mattresses are made from spring or memory foam, so you’ll sink right in as it cradles you to sleep. 

Firm

Firm but still soft enough to conform to your body type, these firm mattresses are usually made from high-quality pocket springs. 

Medium Firm

The middle ground of firmness, it offers a strong level of support for your lower back, hips, and shoulders as you sleep. 

Extra Firm

The highest level of firmness, with no conforming properties. This is for those who need their lower backs, joints, and hips supported. 

How Many People Fit On a King-Size Mattress?

A king-size mattress comfortably accommodates two adults, offering each person the equivalent space of a single mattress. This spaciousness makes it ideal for couples who want to share a mattress with plenty of extra room to spare. 


Additionally, it can conveniently fit a child or pet alongside the adults, making it a popular choice for families. The generous dimensions of a king-size mattress also cater to larger individuals or those who prefer extra room to stretch and move during their sleep. A king-size mattress ensures a comfortable and restful experience for a variety of sleeping arrangements.

How Much Does a King-Size Mattress Cost?

It is the most expensive size mattress below the super-king mattress. At Factory Buys, we have a range of prices available with many great prices available. Browse the collection to find a great sale and potentially save on your sleeping investment. 


Each king mattress is made from high-quality materials with a variety of features at a great value. We offer fast delivery to anywhere in Australia and Afterpay options to break down the cost. 

Where Can I Buy a King Mattress Online?

Right here at Factory Buys! Here at Factory Buys, we provide a comprehensive Warranty for your king-size mattress so you can sleep easy. If you need any more information or more help, get in touch with us today.