There seems to be an issue with the formula calculating "Cells required" in the "Yeast" section of the web recipe editor. As an example, for 20L of 12.7°P wort and a pitch rate of 0.75 million cells / ml / ° P the Cells Required field displays 50 B. The Pitch rate and starter calculator on the other hand calculates that 191 Billion cells are needed. If one does the arithmetic by hand that's actually the correct number.
Dr. Z
Dr. Z