Online Tool Store
Mattress Size Converter
Enter a mattress size name or dimensions to convert between US, UK, European, and metric mattress size conventions. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Example
Mattress Size Converter
Sample: US Queen
Example shown — replace it with your own size or dimensions.
Result
How it works
- Enter a mattress size name or its dimensions.
- Pick the region convention you're converting from.
- See the closest equivalent size in other conventions.
The method
Standard size charts for US, UK, and EU mattresses are used to find the closest matching dimensions across conventions, since sizes rarely align exactly.
FAQ
Why don't US and UK mattress sizes match exactly?
Mattress sizing conventions developed independently by region, so a "Queen" in the US isn't the same dimensions as a UK "Double" — this tool shows the closest equivalent, not an exact match.
Can I convert from exact dimensions instead of a size name?
Yes — enter width and length directly and get the closest matching size name in each convention.
Does this cover European sizes too?
Yes — US, UK, and common EU metric sizes are all included.
How we compare
| Feature | Online Tool Store | Manufacturer size chart PDF | Manual unit conversion |
|---|---|---|---|
| No software install | Yes | Yes | Yes |
| Quick to start | Yes | Search required | Slower |
| Free to use | Yes | Free | Free |
For a fast lookup without hunting down a manufacturer's chart, this gets you the closest match in seconds.