Handy calculator for shaku, sun, bu.

[When Necessary]

Please discard this if there's something similar already on the forum but this is a handy little calculator for converting traditional Japanese measurements to cm and inches.
 

Shaku convertor

 

[Bugyotsuji]

Very useful Dee. Thank you. I think I have run across that site many moons ago, but nice to rediscover it. I have a useful old tape measure showing inches, centimeters and shaku measurements on it. 

 As a rule of thumb, one shaku is ten sun, and at roughly the same mark is one foot, i.e. twelve inches, which also coincides with 30 centimeters. A convenient convergence of three measuring systems within about half a centimeter. 

[When Necessary]

Thank you, Piers.

I'm reasonably familiar with the ratios of the different measuring systems but I thought this might aid any newbie, fresh into the hobby.

[Lewis B]

Thats the one I've been using. Probably the best one I've found online.

[Brano]

The conversion can be done very easily using a calculator that every mobile phone has today

Let's say blade 2 shaku 4 sun 7 bun
use 30.3 x 247 and in the result you will move the decimal point by two places

[When Necessary]

I'm lousy at math Brano - I just personally find this a simpler method.

[Gakusee]

19 minutes ago, Brano said:

The conversion can be done very easily using a calculator that every mobile phone has today

Let's say blade 2 shaku 4 sun 7 bun
use 30.3 x 247 and in the result you will move the decimal point by two places

 

I use the same maths as it is effectively 3 and 0 repeating indefinitely:  3.0303 etc or 0.3030 or 30.303030 etc. Very easy to put in a calculator 

 

I personally put this in the calculator for this above: 

2.47 x 30.303030 for result in cm 

[When Necessary]

I'm also awful with computers and calculators. 😁

[Robert S]

10 hours ago, Brano said:

The conversion can be done very easily using a calculator that every mobile phone has today

Let's say blade 2 shaku 4 sun 7 bun
use 30.3 x 247 and in the result you will move the decimal point by two places

Thanks for that.  I built a quick excel calculator using that math.  Nerd, I know