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Ring Size Calculator

Ring Size Calculator

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US units or Metric units?

What did you measure?

mm

Circumference of Finger

in

Circumference of Finger

mm

Inside Diameter of Ring

in

Inside Diameter of Ring

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The ring size calculator measures the ring size on the basis of internal circumference and the diameter of the ring.

How to Measure the Ring Size?

You can measure the ring size by the following two methods:

Find Inside Circumference:

  • Cut a small strip of paper and roll it in the length and place it in the opening of the ring. 
  • Now use a sharp pencil to mark precisely where the strip overlaps.
  • Remove the paper strip to find the length of the strip with the ruler.

Measure the Inside Diameter:

  • Use a vernier caliper to find the inside diameter by entering the collars of the caliper in the ring.
  • Precisely determine the inside circumference.
  • Then enter the value in the ring size calculator.

The online cm to ring size converter automatically measures the inside diameter of the ring.

The International Ring Size Chart:

The International ring sizes are measured in Inches, centimeters, and in millimeters. For the ring size equivalents, such as for the US ring size or UK ring size, use the ring chart conversion and find your desired measurements. There can be different sizes yet for the same measurement of the ring. The ring size calculator computes the ring size in the measurements used in various countries around the world.

You can find all the estimated values in the ring size chart in cm,mm, and in inches.The cm to ring size converter present you the values in the most common estimation around the world. Women and mens ring size chart inches and mm variables in different countries. 

 

Inside Diameter Inside Circumference Sizes
mm Inches mm Inches UK & Australia US & Canada France Germany Japan Switzerland
11.53 0.454 36.22 1.43 _ 0 _ _ _ _
11.95 0.474 36.22 37.54 1.49 A 1/2 _ _ _
12.37 0.487 38.86 1.53 B 0 1 _ _ 1
12.78 0.503 36.22 40.15 1.58 C 1 1/2 _ _ _
13.21 0.520 36.22 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
14.05 0.553 44.14 1.74 F 3 44 14 4 4
14.36 0.565 45.11 1.77 G 3 3/8 45 1/4 _ 5 5 1/4
14.45 0.569 45.40 1.79 G 1/4 3 1/2 _ 14 1/2 _ _
14.56 0.573 45.74 1.80 G 1/2 3 5/8 _ _ 6 _
11.53 0.454 36.22 1.43 _ 0 _ _ _ _
14.65 0.577 46.02 1.81 H 3 3/4 46 1/2 _ _ 6 1/2
14.86 0.454 46.68 1.84 H 1/2 4 _ 15 7 _
15.04 0.592 47.25 1.86 I 4 1/4 47 3/4 _ _ 7 3/4
15.27 0.601 47.97 1.89 I 1/2 4 1/2 _ 15 1/4 8 _
15.40 0.606 48.38 1.90 J 4 5/8 49 15 1/2 _ 9
15.70 0.618 49.32 1.94 J 1/2 5 _ 15 3/4 9 _
16.00 0.630 50.27 1.98 K 1/2 5 3/8 _ _ 10 _
16.10 0.634 50.58 1.99 L 5 1/2 51 3/4 16 _ 11 3/4
16.51 0.650 51.87 2.04 M 6 52 3/4 16 1/2 12 12 3/4
16.92 0.666 53.16 2.09 N 6 1/2 54 17 13 14
17.35 0.683 54.51 2.15 O 7 55 1/4 17 1/4 14 15 1/4
17.75 0.699 55.76 2.20 P 7 1/2 56 1/2 17 3/4 15 16 1/2
18.19 0.716 57.15 2.25 Q 8 57 3/4 18 16 17 3/4
18.53 0.729 58.21 2.29 Q 3/4 8 1/2 _ 18 1/2 17 _
18.61 0.733 58.47 2.30 R 8 5/8 59 _ _ 19
18.89 0.748 59.34 2.35 R 3/4 9 _ 19 18 _
19.10 0.752 60.00 2.36 S 9 1/8 60 1/4 _ _ 20 1/4
19.41 0.764 60.98 2.40 S 3/4 9 1/2 _ 19 1/2 19 _
19.51 0.768 61.29 2.41 T 9 5/8 61 1/2 _ _ 21 1/2
19.84 0.781 62.33 2.45 T 1/2 10 _ 20 20 _
20.02 0.788 62.89 2.48 U 10 1/4 62 3/4 _ 21 22 3/4
20.20 0.797 63.46 2.50 U 1/2 10 1/2 _ 20 1/4 22 _
20.32 0.800 63.84 2.51 V 10 5/8 63 _ _ 23 3/4
20.68 0.814 64.97 2.56 V 1/2 11 _ 20 3/4 23 _
20.76 0.817 65.22 2.57 W 11 1/8 65 _ _ 25
21.08 0.830 66.22 2.61 W 3/4 111 1/2 _ 21 24 _
21.18 0.834 66.54 2.62 X 11 5/8 66 1/4 _ _ 26 1/4
21.49 0.846 67.51 2.66 Y 12 67 1/2 21 1/4 25 27 1/2
21.89 0.862 68.77 2.71 Z 12 1/2 68 3/4 21 3/4 26 28 3/4
22.33 0.879 70.15 2.76 Z+1 13 _ 22 27 _

Women and men’s ring size chart in inches and in mm make it easy to find your own ring size.

How Does the Ring Size Calculator Work?

Let us see how the simple interface of our calculator allows us to calculate your ring size in moments. 

Input:

  • Choose the measuring unit and what you want to measure
  • Enter the inside diameter or circumference
  • Hit the calculate button 

Output: 

  • Circumference of the finger 
  • Diameter of the ring

What is the Average Ring Size for Men?

The average ring size for men is around 8 to 10, it is 64.7 to 69.7 mm. The ring size chart circumference can be used to find the average circumference of the ring in inches and in cm.

References:

From the source of bluenile.com: Diamond Ring, Men’s Ring Size Chart Inches

From the source of realsimple.com: How to Measure Ring Size, Ring size chart male