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Soroban

Tool to calculate automatically with the abacus. Soroban is an evolution of Chinese abacus developed in Japan. It contains 1 quinary and 4 unary to count between 0 and 9.

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Soroban -

Tag(s) : Numeral System

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Soroban

Soroban Converter

From an abacus


















From a decimal number



See also: Calculator

Answers to Questions (FAQ)

What is a Soroban? (Definition)

A soroban is a Japanese abacus that has a quinary (for the value 5) and 4 unaries (for the value 1). It behaves like a classic abacus and allows you to add, subtract, multiply or divide.

How to use a Soroban?

The soroban stands horizontally, so that the quinary is at the top and the unaries at the bottom.

In its initial position, the balls are pushed outwards and all the columns show O-|-OOOO.

The count in base 10 is done as an addition: the 1 and the 5 are added for each column representing the units, then the tens, then the hundreds, etc. (from left to right)

Example: O-|O-OOO
O-|OO-OO
gives number 12

0O-|-OOOO
1O-|O-OOO
2O-|OO-OO
3O-|OOO-O
4O-|OOOO-
5-O|-OOOO
6-O|O-OOO
7-O|OO-OO
8-O|OOO-O
9-O|OOOO-

Who uses Soroban?

Surprisingly there are still many users of Soroban in Japan. Until recently, a Soroban competence test (with different levels of increasing difficulty) was required to work in some companies or departments.

The Chinese have also adopted its use, but the use in China is rarer.

Source code

dCode retains ownership of the online 'Soroban' tool source code. Except explicit open source licence (indicated CC / Creative Commons / free), any 'Soroban' algorithm, applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any 'Soroban' function (calculate, convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (Python, Java, PHP, C#, Javascript, Matlab, etc.) and no data download, script, copy-paste, or API access for 'Soroban' will be for free, same for offline use on PC, tablet, iPhone or Android ! dCode is free and online.

Need Help ?

Please, check our dCode Discord community for help requests!
NB: for encrypted messages, test our automatic cipher identifier!

Questions / Comments

Thanks to your feedback and relevant comments, dCode has developed the best 'Soroban' tool, so feel free to write! Thank you!


Source : https://www.dcode.fr/soroban-abacus
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