NGAO COWCULATOR

Ngau Rules & Calculator Guide

This page explains how the Ngau (Niu-Niu / Bull-10) calculator works, including special rules like Ngau Tong Ku and Bou Bou.

How scoring works

  1. Pick any 5 cards.
  2. If any 3 cards sum to a multiple of 10, the remaining 2 decide the points.
  3. A remainder of 0 is Niu-Niu (Bull 10). Otherwise the remainder is the score.

Special rules supported

  • Ngau Tong KuAce of Spades + face card (J/Q/K).
  • Ngau Tong Ku JokerJoker + Ace of Spades or face card (J/Q/K).
  • Bou BouTwo identical ranks as the top pair.
  • JokerIf any 3-card bottom combination includes Joker, it is automatically valid (counts as 10).

Tips

  • Tap a rank, then choose the suit from the wheel.
  • Swipe a card upward to remove it.
  • Hold delete to clear all cards.
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