Cm To Ring Size Converter
Find your US ring size by entering the circumference of your finger in centimeters. A useful tool for online jewelry shopping.
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About the CM to Ring Size Converter
The "CM to Ring Size Converter" is a straightforward tool that helps you find your approximate US ring size using a simple measurement you can take at home. If you measure the circumference of your finger in centimeters (cm), this calculator will find the closest corresponding standard US ring size, making online jewelry shopping easier.
How Does the Calculator Work?
The calculator uses a two-step process: it first converts your measurement and then matches it to a standard size chart.
The Formula and Logic
- Convert Centimeters to Millimeters: Ring sizes are standardized based on millimeter measurements. The calculator first converts your input using the basic metric formula:
Circumference in mm = Circumference in cm × 10 - Find the Closest Match: The calculated millimeter value is then compared against an internal chart of standard US ring sizes and their corresponding circumference measurements. The calculator identifies the US ring size that is mathematically closest to your measurement.
Practical Example
Here’s how you can use the calculator:
- Step 1: Measure Your Finger: Take a thin strip of paper or a piece of string and wrap it around the base of your finger. Make sure it's snug but can still slide over your knuckle. Mark the spot where the paper or string overlaps.
- Step 2: Get the Measurement: Lay the strip flat and measure its length in centimeters with a ruler. Let's say your measurement is 5.7 cm.
- Step 3: Use the Calculator: Enter "5.7" into the calculator. It will convert this to 57 mm and find that the closest standard US ring size is 8 (since size 8 is 57.0 mm).
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