You are not logged in. 
now: Fri Sep 17 05:18:51 2021 ... mod: Sun Apr 4 18:50:31 2021

Log in 
doubling time = T ⋅ ln(2) / ln(N_{L} / N_{i}) measured in units of T.
example:
at 4:00 pm on Monday, 3 x 10^{5} cells are plated. At 3:00 pm the following Friday, 2.5 x 10^{6} cells are counted.