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Ring Size Calculator

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

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Inches
mm
in
mm
in

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

What Exactly is Our Ring Size Calculator?

Are you willing to measure or calculate the size of your ring? This ring size calculator will let you know the perfect size of your ring. There are a couple of steps you need to follow and you are done by your side. The user-friendly interface of this ring size calculator makes it easy to calculate the ring size in a couple of seconds. Let’s have a look at how it works.

How Can We Calculate the Ring Size Online?

Here's how you can calculate your ring size:
  • Select the measuring unit i.e., millimeters and inches.
  • Choose what did you measure and enter the value in the input box.
  • Hit the “Calculate” button for finding the ring size.
Note: You must know one measurement whether it is the circumference of your finger or the inside diameter of your ring.

How Can We Measure the Ring Size Manually?

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.

Important Tips for Accurate Measurements

Here are some important tips to measure your ring size accurately and for avoiding revisions and modifications:
  • Measure the right finger of the correct hand.
  • Don’t measure just after waking up.
  • Take measurements after having a light sport.
  • Measure the ring size when you’re properly hydrated.
  • If you getting a ring for gifting someone, try to choose the slightly bigger one.

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. The cm to ring size converter present you the values in the most common estimation around the world. 
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.

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
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