How much yeast to pitch?

[theNOOB]

I've come to understand with my first 2 brews that pitching the proper amount of yeast is crucial in getting a healthy fermentation an finished product. Im still a little in the dark, however, about how to know what the right amount is. What are the dangers, if any, of over and under pitching? Some explanation on this would be much appreciated.

 

[afr0byte]

http://www.mrmalty.com/pitching.php ... http://www.mrmalty.com/calc/calc.html

 

[theNOOB]

Danke schön