• Japanese Mahjong Calculator 1
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  • Japanese Mahjong Calculator 3
  • Japanese Mahjong Calculator 4

Japanese Mahjong Calculator

Riichi Calc is an easy to use app that takes any valid Japanese mahjong hand and calculates all possible winning combinations. A great companion for any Japanese mahjong player! Feel free to e-mail me about any calculation errors.
Features: 
• Used for the Japanese variant of Mahjong 
• Order is irrelevant. The app will rearrange the tiles for you 
• Determine waits of a tenpai hand 
• Provides warnings against illegal combinations (eg. riichi with an open hand) 
• Can also calculate points using han and fu as the input 
• Display yaku in English or romanized Japanese

Please note: 
• Swipe right to access Hand Conditions 
• Most recently added tile will be set as the winning tile and is shown in red, it can be changed by performing a long press on another tile 
• Ads shown when online ('Remove Ads' is currently disabled due to some issues) 
• Network permission is used only for ads, this app doesn't collect any user data whatsoever

keywords: riichi mahjong calculator, mahjong hand calculator, mahjong score calculator, mahjong points calculator, mahjong helper, 麻雀得点, 麻雀計算, 麻雀 点数

Category : Tools

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Reviews (29)

Fra. S. Feb 9, 2021     

Works like a charm. Only 1 tiny comment: it appears you'll have to set the settings to Japanese Romaji, NOT to English..for otherwise it will not let you enter pairs and cannot do the calculation for you.

Ben. D. Mar 20, 2020     

Very good provided you understand Japanese Mahjong well like I do, but have never mastered scoring. Would benefit from a "clear all tiles" button/function but not a major concern. Update have now given it 5 stars

Chr. A. Jul 25, 2021     

Great app! I play a mahjong game that's in Japanese, and sometimes I can't figure out what Yaku I have, so this really helps. Easy to use and very helpful

Tom. F. Sep 16, 2020     

Very good calculator for Riichi (best imo) only problem is that I cant even pay to get rid of ads, which would be worth it

M. M. Jul 18, 2020     

Exceptional, I want to pay for no ads. Love the app, I would rather pay just to get rid of them.

Rag. Mar 31, 2022     

Help>Removing ads: "Removal of ads is currently unavailable" = Removing App

Łuk. K. Jul 30, 2019     

great app. I'm leaving four stars because there is no way to remove the ads. I'd be happy to pay a premium for it :)

张橙子. Jan 16, 2020     

Great app! Simple and easy to use, also very detailed in point distribution

Dak. G. Jun 15, 2019     

Trying to use the thing to beat the mahjong challenges in Yakuza/Ryu ga Gotoku. thing says literally all my hands are invalid even when I put the hand i just won with. No thanks

Iva. M. Jun 6, 2021     

Tenhou/chihou to add more yakuman would be nice. But it's already a very nice app for score calculation

Ken. W. Jul 27, 2021     

Great app! But I wish I could pay to remove ads.

Al. F. Dec 11, 2021     

really helps alot for beginners to scoring their hand

shw. g. Jan 31, 2021     

The app is probably the best on the market but even better is how steadfast the developer is about replying to user queries.

Sea. Jan 30, 2020     

Best one on any platforms!

Eva. L. Sep 25, 2021     

Exactly what I want. Enter the hand and conditions and you get a calculation.

Der. H. Jan 4, 2021     

I was hoping for tiles to complete hands

Mad. M. May 17, 2021     

point calculator for mahjong

Ста. К. Mar 5, 2017     

Very good app, but there needs to ba a paid version with no ads. Me myself and many other people would love to appreciate your work. Plus, a honba counter should be added.

A. G. u. Oct 30, 2017     

Need a little learning to use it first, but other than that, it's a great app.

Jer. M. Apr 23, 2017     

Helped me with the shaolin shuffle GnS easter egg lmao, great app!

Ped. V. Nov 13, 2016     

Once you learn the right way to use it you won't play without it.

Kur. Feb 19, 2016     

Awesome app. Really helpful for calculating points. Thx alot for the Houtei update. *Thumbs up*

Tho. S. Jul 31, 2016     

UI is a bit confusing (exposed vs concealed, winning tile) but once you get it, the app is very simple/useful.

acu. Feb 25, 2016     

Would be nice to have red fives supported. Unless I am missing them somwhow.

A. G. u. Mar 4, 2016     

Great app! But it would be nice to improve the way of winning tile selecting.

Ign. R. P. Oct 26, 2015     

I believe that I'm not wrong when I say that when you win by Rinshan Kaihô you don't get the 2 fu for tsumo win. At least that's what my japanese mahjong book says... I hope I'm not mistaken. It would be cool to have an option to see the japanese kanji instead of rômaji or english terms. Also there's no real need to add a honba count method, but it may simplify things for some people. EDIT: I saw too that sometimes having a pair with both seat and round wind, only nets you 2 fu and not 4 fu...

the. Dec 4, 2014     

Always had trouble even knowing my yaku. Thanks.

Luc. S. Jul 20, 2015     

Loved the app. So good for calculating points, but I would like to have the japanese characters version... How do I download it? You also should have a aotenjou system for those who like to play it...

Kod. R. May 9, 2015     

But it needs a better way of showing what melds are open or closed.