To calculate your chance of hitting on turn or turn/river:

Lets say you have 2 pair on the flop, whats the chance you`ll improve to a Full House?

you have 4 outs, to calculate the chance of hitting on the next card, multiply your outs by 2 and add 1, so about 9%

to calculate your chance on turn/river, multiply by 4 and substract 1% for every out you have above 8, so 4*4=16 in this case

if you would have 15 outs, it would be 4*15 - 7 =53%

this is quite accurate

nice tip, I didnt know you had to substract the number of outs above 8 !!

Thanks

yeah otherwise you would have a 100% chance of hitting turn or river when you have 25 outs or more lol (not that that happens very often though)

Nice rule! And very easy to use while playing Poker