Mahj Atlas

Free American mahjong tools

  • Set checker

    Four questions about jokers, flowers, blanks and racks tell you whether a set will work for American mahjong.

  • Charleston trainer

    Deal a random hand and pass tiles right, across and left, with blind passes, the vote and the courtesy pass.

Common questions

Are the Mahj Atlas tools free?

Yes. Both tools are free, need no account and run in your browser.

Is there a scoring calculator?

Yes, on our scoring page.

Is there a printable cheat sheet?

Yes: the one-page cheat sheet.