๐ Fashion & Sizing
Ring Size Converter
Every region numbers rings differently because some use the inside diameter, some the circumference and some an arbitrary scale. A US 7 is a UK N, an EU 54 and a Japanese 14 โ the same physical ring, four different labels.
How it works
Your ring size system
Your ring size
US
UK
EU / ISO
Japan
Inside diameter
Inside circumference
Frequently asked questions
How do I use the Ring Size Converter?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.