How to Count Outs in American Mahjong
An out is an unseen tile that improves or completes your hand. Counting outs gives a more realistic picture than simply saying a rack is one or two tiles away. Two hands may be equally close in structure while one has many possible improving draws and the other depends on a single natural tile.
Count legal improvements, not just missing symbols
Start with the exact card line and identify every tile that would move the rack forward. Then remove copies already visible in your rack, exposures, and discards. Finally, apply the card's restrictions: a joker may help an eligible group of three or more, but it cannot complete a pair or single.
Do not count the same physical tile twice merely because it could help two positions. Count distinct unseen copies, then note that some draws preserve more flexibility than others.
Broad and narrow waits
Broad wait
Several different tile identities improve the hand, or multiple copies of one identity remain unseen.
Narrow wait
The hand depends on one exact natural tile, a scarce pair mate, or a restricted honor tile.
A beginner out-counting method
Choose the exact line
Do not count outs against a vague section or family.
Mark incomplete groups
Separate pairs, singles, pungs, kongs, quints, and mixed groups.
List helpful identities
Write or mentally name every tile that legally advances the hand.
Subtract visible copies
Use your rack, the discard field, and all exposures.
Apply joker rules
Add joker flexibility only where the group permits it.
Compare alternatives
Favor the hand with more live natural tiles and fewer exact bottlenecks.
Common out-counting errors
- Counting a joker as an out for a pair or single.
- Ignoring copies already visible in another player's exposure.
- Counting a tile that would violate the printed suit relationship.
- Treating two separated pairs as one joker-eligible group.
- Assuming every unseen tile remains in the wall.
- Forgetting that a call may expose the hand and eliminate concealed options.
Out-counting questions
Can I know exactly how many outs remain in the wall?
No. You can count unseen copies, but some may be in opponents' racks. The count is an estimate of availability, not certainty.
Should I always choose the hand with the most outs?
Not always. Exposure status, safety, joker dependence, and pivot options also matter.
Do flowers count as multiple outs?
When flowers are interchangeable, each unseen flower may help the same required flower position.