Find your ring size by diameter or circumference
Calculate your ring size easily online. Convert diameter and circumference to US, UK, and EU sizes. A useful online tool for your daily life. Calculate values quickly, for free, and without registration.
Using it is incredibly simple: Enter your values into the provided fields. The Ring Size Calculator processes this data immediately and shows you the precise result. No installation or registration is required.
Save time and avoid errors with this practical calculator for daily tasks. Our tools are designed to handle complex calculations for you and provide instant answers. Optimized for desktop, tablet, and smartphone.
Yes, all our tools are 100% free.
No. All calculations happen directly in your browser. No personal data is sent to our servers.
It's best to measure the inside diameter of a ring that fits you well. Alternatively, wrap a strip of paper around your finger to measure the circumference.