King vs Queen Mattress in Australia: Size Guide and Price Comparison

Australian Mattress Sizes

Single: 92cm x 187cm. Suitable for children and single adults.

King Single: 106cm x 203cm. Extra length for taller teenagers and adults.

Double: 137cm x 187cm. Fits two people but with limited personal space.

Queen: 153cm x 203cm. The most popular size in Australia. Minimum room: 3m x 3.6m.

King: 183cm x 203cm. 30cm wider than queen. Minimum room: 3.6m x 3.6m.

Super King: 203cm x 203cm. The largest standard Australian size.

King vs Queen: The Real Differences

Space per person: A queen gives each partner 76.5cm of width. A king gives 91.5cm. That extra 15cm per person makes a real difference.

Price difference: Kings typically cost 20-35% more than queens in the same model.

Room requirements: A king in a 3m x 3m room leaves almost no space for bedside tables. Measure your room before deciding.

When to Choose Queen

Bedroom under 12 square metres, partners sleep relatively still, budget is primary concern, or you move house frequently.

When to Choose King

Restless sleepers, co-sleeping with children or pets, bedroom is 13+ square metres, or you value personal space during sleep.

How Claire Helps

Tell Claire your size preference and she filters results accordingly, factoring size into her scoring and recommendations.

This content is educational only.

## The Real Dimensions and What They Change

An Australian king mattress measures 183cm x 203cm — the same width as two single mattresses side by side — while a queen measures 153cm x 203cm. The king is 30cm wider and, critically, gives each partner roughly the width of a single bed: about 91cm per person versus 76cm per person on a queen. For couples, that extra 15cm per side is the difference between elbows knocking and sleeping undisturbed.

Length is identical at 203cm, so tall sleepers gain nothing from upgrading to a king in length terms. If height is the problem, check the super-king (240cm long) or a custom length; if width is the problem, the king is the fix.

## Room Size and Bedroom Fit

The practical rule for a king is a bedroom at least 3m square, because you need 60-80cm of clearance on both sides to make the bed and open drawers. Measure your access path too: king mattresses and frames need to fit through doorways, hallways, and stair turns. If your bedroom is tighter, a queen at 153cm wide fits comfortably in a 3m x 3.4m room and leaves room for bedside tables.

Do not judge fit from the showroom floor. Tape the dimensions out on your floor at home, at the positions the bed will occupy, and walk the perimeter. The most common buyer regret is the king that makes the whole room feel like a bed.

## Price Difference and Whole-Of-Bed Cost

King mattresses typically cost 30-50% more than the same model in queen, and the difference compounds across the whole bed: frame, base, sheets, mattress protector, and topper all price higher in king. A $1,200 queen can become a $1,700 king with $250 of extra linen and a $150 frame premium — roughly a 50% whole-of-bed uplift.

Decide on the mattress size before choosing anything else, because the frame, base, and linen all follow it. For singles, the value argument points to queen; for couples who value undisturbed sleep or have different schedules, the king premium usually justifies itself within a few nights.