You can enter batch size, og, ale/lager, yeast date/viability and initial cell count (or use defaults) and then it will help you work out your starter size, or steps for a stepped starter
http://yeastcalc.summitwoodwork.com/
Highly Recommended
Uses Growth Rates as documented on the calculator, and matches Mr Malty for Viability data
Development Discussion seems to happen here
http://www.aussiehomebrewer.com/forum/i ... t&p=832987
