A king size bed in cm refers to the standard metric dimensions of a king bed, measured in centimetres rather than inches. In Australia, a standard king size bed measures 183 cm wide x 203 cm long. In simple terms, it’s one of the largest standard mattress sizes available, designed to provide generous sleeping space for two adults.
Here’s why this matters: knowing the exact king size bed dimensions in cm helps Australians choose the right mattress, bed frame, bedding and bedroom layout without costly sizing mistakes.
In Australia, king size beds follow a consistent national standard. The most common measurements are:
Width: 183 cm
Length: 203 cm
Sleeping surface area: Large enough for two adults to sleep comfortably without disturbance
It’s important to note that these measurements refer to the mattress size, not the overall bed frame, which may be wider or longer depending on the design.
In simple terms, always check both mattress and frame dimensions before purchasing.
Understanding how a king size bed compares to other Australian bed sizes makes choosing easier.
Queen bed: 153 cm x 203 cm
King bed: 183 cm x 203 cm
Super king bed: 203 cm x 203 cm
The main reason Australians upgrade from a queen to a king size bed is the extra 30 cm of width, which significantly improves personal sleeping space.
While the mattress measures 183 x 203 cm, the bed frame dimensions in cm vary depending on style:
Minimal platform frames: Add approx. 2–5 cm on each side
Upholstered beds: Add approx. 6–10 cm per side
Storage beds: Often add extra height and width
Statement headboards: Increase overall length
Here’s why this matters: a king size bed frame can easily exceed 195–205 cm wide, so room planning is essential.
To ensure comfort and good circulation, interior designers recommend the following minimum room size for a king size bed:
Minimum room width: 360–380 cm
Minimum room length: 380–400 cm
This allows space for:
Bedside tables
Walkways on both sides
Comfortable access to wardrobes and doors
In simple terms, a king size bed works best in medium-to-large bedrooms rather than compact spaces.
While width and length matter most, bed height also affects comfort and styling.
Typical combined heights (bed base + mattress):
Low-profile beds: 45–50 cm
Standard height beds: 55–65 cm
Luxury or storage beds: 65–75 cm
The main reason Australians consider height is ease of getting in and out of bed, especially for taller sleepers.
Correct sizing ensures bedding fits properly.
Australian king size bedding typically matches:
Fitted sheets: 183 cm x 203 cm (with depth allowance)
Flat sheets: Oversized for tuck-in
Doona covers: Approx. 240 cm x 210 cm
In simple terms, always buy Australian-sized king bedding, as overseas sizes differ.
Here’s a simple, practical checklist:
Measure your room in cm
Include door swings, wardrobes and windows.
Allow clearance space
Aim for at least 75–90 cm walking space on each side.
Check bed frame dimensions
Not just the mattress size.
Match bedding correctly
Ensure fitted sheet depth suits your mattress height.
Plan future upgrades
Consider whether you may add a mattress topper or storage base later.
The main reason accurate measurements matter is to avoid returns, delivery issues and poor room flow.
At House of Isabella Australia, king size beds are curated with Australian room proportions and lifestyle needs in mind. Every design clearly lists dimensions in cm to help customers plan confidently.
Why Australians choose House of Isabella:
Buy Now, Pay Later with Afterpay & Zip
Fast delivery Australia-wide
East & West Coast warehouses for efficient fulfilment
Large in-stock catalogue ready to ship
Exclusive, design-led bedroom furniture
Australian-based customer care
Design inspiration influenced by collections such as Florabelle Collection, Gallery Home and Emac & Lawton ensures king size beds balance generous scale with refined aesthetics.
In 2025, how Australians use king size beds is evolving.
Hybrid and pillow-top mattresses increase overall bed height.
Statement headboards and winged designs add visual width beyond 183 cm.
Storage bases add height and require extra room clearance.
Larger bedrooms are being designed specifically around king size beds as focal points.
The main reason these trends matter is that bed dimensions increasingly influence entire bedroom layouts.
Styling a king size bed correctly ensures it feels luxurious, not overwhelming.
Use oversized rugs (at least 300 x 400 cm)
Choose wider bedside tables to balance proportions
Opt for tall headboards in high-ceiling rooms
Keep walkways clear to maintain flow
In simple terms, scale is everything when styling a king size bed.
Is a king size bed always 183 x 203 cm in Australia?
Yes, that is the standard Australian king mattress size.
Is a super king bigger than a king in cm?
Yes. A super king measures approximately 203 x 203 cm.
Do bed frames change the mattress size?
No, but they increase the overall footprint.
King size bed
Queen vs king bed
Super king bed
Bed frame dimensions
Bedroom furniture
Mentions of brands such as Florabelle Collection, Gallery Home, Café Lighting & Living, Zaffero, Emac & Lawton and others are included purely for descriptive and contextual purposes. House of Isabella Australia is not affiliated with, endorsed by, or associated with these brands.
My Cart
Your Cart Is Empty
Continue shopping
