Ring Size Calculator
Convert between ring circumference, diameter and US/UK/EU/CN ring sizes. Find your perfect fit.
—
📊 Result Chart
About Ring Size Calculator
Ring Size Calculator is a free online tool. Convert between ring circumference, diameter and US/UK/EU/CN ring sizes. Find your perfect fit online. Works on mobile and desktop, all calculations run locally in your browser for privacy.
Ring Size Calculator in 3 steps
- Enter the first parameter
- Enter the second parameter
- Click "Calculate" to see the result
Is this tool accurate?
Results are computed with standard, industry-accepted formulas for Finger Circumference and other values calculations.
Do I need to download anything?
No, it runs entirely in your browser. No downloads needed.