Online ring blank length calculator

Jewelry Discussion
1

Hi,

I got sick of using my crinkly old ring size chart and having to hand
calculate from it, so I wrote an online ring blank length calculator
(in Javascript so you can see the code if you like). I based the
calculator on the H&S chart I have and what I was taught for wider
bands (e.g. for bands wider than 4mm you take the width subtract 4
and multiply by .5 then add that to the length). The calculator is
here:

http://www.ganoksin.com/gnkurl/93

Enjoy!
-m

2 Likes
2 
The calculator is here: http://www.ganoksin.com/gnkurl/93

Looks cool-- I look forward to trying it out!

For those times when you prefer a printed chart, the best one I’ve
found is a freebie at the Contenti site.

http://www.ganoksin.com/gnkurl/ringblankpdf

They have other cool downloads, too, but the ring chart is my
favorite.

Noel

3

Just want to say thanks to Mike for posting this link and being kind
enough to share your very handy calculator! Used it today to make a
ring, just had to convert UK size to US and mm to gauge size
first… : )

Sarah in Wales

4

Updated free online ring blank length calculator

Hi,

I’ve recently updated my online ring blank length calculator to
include ring sizes from different countries:

http://www.ganoksin.com/gnkurl/93

Included are US, UK, EU, Swiss, Japanese, German and Polish ring
sizes, and sheet thickness in either B&S gauge or mm.

I’ve also added an option to download it, so you can run it offline
on your computer or phone (in any browser that supports javascript).

If you have any questions or find any problems with the calculator
please let me know!

Enjoy!
Mike

5

For German sizes you better take the diameter than the
circumference!

e.g. diameter for size 54 = 17.2 mm

17.2 + 2.0 (thickness of material) = 19.2 * 3.1416

Or (less sophisticated): 54 + (2 * 3.1416)

XLS e.g. is quite good at that J

Sylvia

6

Thanks so much. Tho is has been troubling me for awhile!

7

I am getting a 404 error and when I click on tools/apps it wants to download a file that I did not ask for. .gz ending. Maybe check your website to make sure you were not hacked?

8

This seems to work for me…Rob

http://mordent.com/toolsapps/

9

And now it doesn’t work. Sorry…Rob

10

When you press the link you get the 404.
But then press the plus sign next to tools and select ring blank.
And there it is :smirk:

11

The .gz ending mean that it is a .nix compressed file.
***.zip in windows usually.

So you have selected the offline version and need to download it of course.
Then just unzip to wherever you want to have it.

Regards Per-Ove

PS!
I don’t get this option on my phone though.

12

If you download the offline version, when you decompress it it will not have a file extension. Some browsers will display the code in that case. Just rename it to something sensible and add an .htm or .html extension.

13

20211225_102858
20211225_1028581500Ă—2000 1.44 MB

Not too sure about this as this will not produce a UK size M ring , It is way too big

14

The best guide I’ve found is in Harold O’Connors little book, “Jeweler’s Bench Reference” and, omg, it’s still available on Amazon (of course). https://smile.amazon.com/Jewelers-Bench-Reference-Harold-OConnor/dp/0918820030/ref=sr_1_1?crid=3HN2LVMCO9WEG&keywords=Harold+O’Connor&qid=1640463653&sprefix=harold+o’connor%2Caps%2C89&sr=8-1

15

Very strange. $26 on Amazon, $39 used on abebooks.com, $17.75 from Rio Grande.

16

I’ve had his little book from a class with him a long time ago and use it regularly. Great reference!