King Size Mattresses

King Bed Frames

King Bed Bases

King Bed Heads

King Bedroom Packages

King Bedroom Suites

King Bed Linen

Super King Mattress

King Sheet Sets

King Quilts & Doonas

King Quilts & Doona Covers

Mattress Protectors for King Beds

Mattress Toppers for King Beds

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Shop Affordable King Bed Mattresses

A cheap king mattress gives couples and larger bedrooms the surface space they need, and this range covers the most common construction types from pocket spring and euro top to memory foam, cool gel, and latex. Whichever support type suits your sleeping position, every king mattress in this collection ships fast to your door anywhere in Australia. Whether your priority is pressure relief for side sleeping, firmer support for back and stomach sleepers, or a plush pillow top finish, a cheap king mattress here is built using support structures and materials designed to last. Once you've settled on your mattress, pairing it with king mattress toppers lets you fine-tune the surface feel, and adding king mattress protectors keeps the mattress in good condition for longer.

Choosing the Right King Mattress Construction

The construction of a king mattress determines how it feels and how long it performs, so it's worth understanding the main options before filtering by price or thickness. Pocket spring designs use individually wrapped coils that move independently of each other, which reduces motion transfer between sleeping partners and is a practical advantage for couples sharing a king bed. Euro top and pillow top constructions add an extra comfort layer stitched into or on top of the mattress surface, delivering a softer initial feel without sacrificing the underlying support. Tight top finishes provide a firmer, more uniform surface that typically suits back and stomach sleepers. For foam-based options, memory foam mattresses contour closely to the body to redistribute weight and relieve pressure at joints, while cool gel variations draw heat away from the surface for a more temperature-neutral feel through the night. Pocket spring mattresses are also available across multiple firmness levels and thickness ratings, so narrowing construction type first makes filtering the rest of the decision straightforward.

Matching Firmness to Your Sleeping Position

Firmness affects how well the mattress supports your body through the night, and the right level depends primarily on sleeping position and body weight. Side sleepers generally benefit from a softer to medium feel that allows the shoulder and hip to sink in slightly without creating pressure points at those joints. Back sleepers tend to do better on a medium to firm surface that keeps the spine aligned without too much give through the lower back. Stomach sleepers usually need a firmer option to prevent the hips from sinking and placing strain on the lumbar. For those with a clear preference at the firmer end of the range, firm mattresses are grouped separately by size and type. Medium firm mattresses cover the middle range and tend to suit the majority of combination sleepers, particularly couples where each partner has a different primary position.

Setting Up Your King Bed Properly

A king mattress needs a compatible base to perform as designed and last its full lifespan. Slatted bases provide airflow beneath the mattress and are generally recommended for foam and hybrid constructions, while solid platform and ensemble bases suit pocket spring mattresses well. The base or frame you choose also affects the total height of your sleep surface, which changes how your sheets fit and how easy the bed is to get in and out of each day. Checking the base compatibility noted on the product listing before buying avoids issues after delivery. King bed frames come in a wide range of styles and heights, from low-profile platform designs to taller upholstered finishes, and king bed bases cover both standard and storage configurations for those who want the added functionality of under-bed space.

Building Your Complete King Bedroom

A king mattress is the centrepiece of the bedroom, and for shoppers setting up a new room, choosing furniture and accessories around a confirmed mattress simplifies every decision that follows. King bedroom packages pair a matched bed frame and mattress in a single purchase, removing the guesswork of confirming size and height compatibility between separately chosen pieces. For shoppers who want to furnish the full room in one place, king bedroom suites bring together a bed, storage, and complementary bedroom furniture so you can confirm how the pieces work together before committing to any of them individually.

Why Shop at Factory Buys

Every king mattress in this range is dispatched within 1–2 business days from our Australian warehouse and comes with a 12-month warranty. Buy now, pay later with Afterpay, Zip, Klarna and PayPal Pay in 4. Rated 4.6/5 from over 5,800 Trustpilot reviews, Factory Buys is trusted by customers across the country for quality and value, with support here 8am–8pm, 7 days a week.

How do I choose firmness for my sleeping position and comfort?

Side sleepers usually prefer a bit more cushioning for shoulders and hips, while back and stomach sleepers often feel better on a firmer, more supportive surface. If you share the bed, aim for a balanced feel that suits both. Check the product listing for firmness guidance and support notes.

What size and access measurements should I check before delivery?

Measure your bedroom space for the full mattress footprint, then check access points like doorways, hallways, stairwells, and lift sizes. A king mattress is bulky, so tight turns matter. Compare your access measurements to the packaged dimensions on the product page, and clear the path before it arrives.

Which matters more: mattress thickness, support type, or cooling features?

Support type is the priority because it affects comfort and how well you’re held overnight. Thickness can add comfort, but it’s only useful if the support underneath is right. Cooling features are a bonus if you sleep warm. Use the listing to compare support layers, firmness, and any cooling details.

What’s involved in moving, unboxing, and setting it up at home?

For easier handling, clear a path to the bedroom before delivery, and if the mattress arrives rolled, place it on the bed base before carefully unboxing it. Then follow the product instructions for expansion time, allow some airflow while any new-mattress smell settles, and keep the packaging until you are fully satisfied.

What should I know about dispatch, delivery, warranty, and support?

All orders are dispatched from our warehouse within 1 to 2 business days. Delivery typically takes 1 to 12 business days, depending on your location and the courier. All products include a 12 month warranty, and our Customer Support team is available 8 am to 8 pm, 7 days per week. If you need help at any stage, visit our Contact Us page and include your order number plus a short description so we can assist sooner.