Cell Doubling Time Calculator

How to calculate cell doubling time

1. Type the starting count and the final count.
2. Type the hours between the two counts.
3. The doubling time appears with the growth rate, the number of doublings and the doublings per day.

Frequently asked questions

What is the formula?

Doubling time = time × ln 2 / ln(final count / starting count).

Does it work for bacteria?

Yes, for any population in exponential growth. Counts taken in the lag or stationary phase give a longer doubling time.