This is useful for planning a cycle.

http://www.roidcalc.com/

I like to run a cycle using the minimum amount of AAS i can possibly get away with. I also like to keep cycle lengths down - i get in quick and get out quick.

I use this calculator to work out how much of x i need to get my blood levels to a certain value. I use short esters at the beginning of a cycle and at the end, and long esters from the beginning to the middle of the cycle. Using the claulator i am easily able to work out the tapering down and tapering up dosages of the short esters to keep my blood levels at a reasoable amount for the most efficent time.