Bed & Mattress Size Converter
Compare bed and mattress sizes between the UK, Europe, the US and Australia, or enter the dimensions of your mattress, and see how much bigger or smaller the nearest size is in each.
About this tool
The same name means different sizes in different countries. A UK king (150 × 200 cm) is closest to a US queen, while a US king (193 × 203 cm) is wider than a UK super king. European mattresses are almost all 200 cm long and named by width, and UK doubles are 190 cm long, so a European 140 × 200 mattress is 5 cm wider and 10 cm longer than a UK double.
Fitted sheets usually cope with a centimetre or two, but not 10, so check the “compared with yours” column before buying bedding or a mattress for a frame from another country. These are the standard nominal sizes; measure your own mattress if in doubt.