Riichi Calc - Japanese Mahjong Calculator

Contains ads
4.5
337 reviews
50K+
Downloads
Content rating
Everyone
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About this app

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 (e.g. riichi with an open hand)
 • Calculate points using han and fu as the input
 • Display terminology in English or romanized Japanese
Updated on
Jan 27, 2019

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
App activity, App info and performance, and Device or other IDs
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
You can request that data be deleted
4.5
337 reviews
Frans Snel
February 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.
3 people found this review helpful
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A Google user
March 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
5 people found this review helpful
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Richard L
March 20, 2020
Thanks for the feedback. Once tiles have been inputted, a clear button appears in the toolbar which clears all tiles. Hope this helps!
Chris Asma
July 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
1 person found this review helpful
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What's new

Added Japanese as an terminology language option
Minor bug fixes