Calculator Online

Home AI Chat AI Math Solver

NEW

Tools ▾ Category ▾

Pricing Sign In

Calculator Online

Your Result is copied!

Ring Size Calculator

To calculate the ring size, select the unit of measurement and enter either the circumference of your finger or the inside diameter of the ring.

Inches

Millimetres

What did you measure?:

Inside Diameter of Ring:

Inside Circumference of Finger:

Related

The ring size calculator helps you determine your ideal ring size based on the internal circumference or diameter of a ring. This tool makes it quick and easy to find the perfect fit.

What is Our Ring Size Calculator?

Looking for the perfect ring size? Our ring size calculator provides accurate results in seconds. Simply enter the necessary measurements, and you’ll get your ring size instantly.

How to Calculate Ring Size Online?

Follow these steps:

Select your preferred measurement unit: millimeters or inches.
Enter the measurement you have: either the finger’s circumference or the ring’s internal diameter.
Click the Calculate button to get your ring size.

Note: At least one measurement is required: either the circumference or the internal diameter.

How to Measure Ring Size Manually?

Using Inside Circumference:

Cut a small strip of paper and wrap it around the inside of the ring.
Mark where the paper overlaps.
Measure the paper length with a ruler to get the inside circumference.

Using Inside Diameter:

Use a Vernier caliper to measure the inside diameter of the ring.
Record the measurement accurately.
Enter this value into the calculator to find your ring size.

The online cm-to-ring-size converter automatically calculates the inside diameter from your measurement.

Tips for Accurate Ring Measurements

Measure the correct finger on the right hand.
Avoid measuring immediately after waking up.
Take measurements after light activity.
Ensure you are hydrated for accurate sizing.
When buying a gift, consider selecting a slightly larger size.

International Ring Size Chart

Ring sizes worldwide are measured in millimeters, centimeters, and inches. The chart below allows conversion between systems such as US, UK, France, Germany, Japan, and Switzerland.

Inside Diameter		Inside Circumference		UK & Australia	US & Canada	France	Germany	Japan	Switzerland
mm	Inches	mm	Inches
11.53	0.454	36.22	1.43	-	0	-	-	-	-
11.95	0.474	37.54	1.49	A	1/2	-	-	-	-
12.37	0.487	38.86	1.53	B	1	-	-	-	1
12.78	0.503	40.15	1.58	C	1 1/2	-	-	-	-
13.21	0.520	41.50	1.63	D	2	41 1/2	13 1/2	-	1 1/2
13.61	0.536	42.76	1.68	E	2 1/2	42 3/4	13 3/4	3	2 3/4

Ring size charts for men and women, in both inches and millimeters, make it easy to find the right fit.

Average Ring Size for Men

The typical ring size for men is between 8 and 10, corresponding to diameters of 64.7 to 69.7 mm. Use the chart above to convert to other systems as needed.

References:

Source: Blue Nile – Men’s Ring Size Chart

Source: Real Simple – How to Measure Ring Size

Related

Calculator Online

Get the ease of calculating anything from the source of calculator online

Links

Home Conversion Calculator About Calculator Online Blog Hire Us Knowledge Base Sitemap Sitemap Two

Support

Email us at