shipping calculation

Well ebay has one. If you are selling on ebay you click on calculated shipping. Other than that I'd like to know.
 
i use the usps flat rate priority boxes for almost anything that'll fit
small = $5
medium = $12
large = $15
under 75lbs., if it fits it ships :)
 
I use to use the calc that herp linked to, just add a pound or so for box and padding. Flat rate is ok especially for heavy stuff but normally you can ship cheaper in your own box. A lot of times priority is cheaper if its not too far.