Practical Poker Math

The Calculations
After the Flop and before the Turn card has been dealt, there
are 45 unseen cards. When calculating the odds with 2 cards
to come, an important number is the total possible 2-card
combinations that can be made from the remaining unseen
45 cards — Comb(45, 2):
(45 * 44) = 990
(1 * 2)
To find the WILLs, add the number of possible 2-card combinations
that will contain 1 and only 1 of the available outs
to the number of 2-card combinations that will contain 2
out cards.
Low Draw >>> Low with 2 Cards to Come
With a Low draw, 16 of the unseen 45 cards will make a Low.
There are 6 cards among the 45 that will counterfeit one of
203
After the Flop
After the Flop Hand After River Card Odds
Flush Draw Flush 1.75 : 1
Low Draw &
Flush Draw
Low or Flush .4 : 1
Low Draw &
Flush Draw
Low & Flush 8.2 : 1
Open Straight Draw Straight 2.1 : 1
Gut-Shot
Straight Draw
Straight 4.8 : 1
2 Pair Full House or Quads 4.6 : 1
Set Full House or Quads 1.9 : 1
Made Straight
or Flush
Pair the Board 1.4 : 1