Enter the total % increase per period into the calculator. The calculator will evaluate and display the total periods (time) it takes for that value to double.

Doubling Time Formula

The following formula is used to calculate the number of periods it takes to double, given the percent increase of a value per period.

dt = log(2) / log(1 + i)
  • Where dt is the doubling time
  • i is the increase per period.

To calculate doubling time, take the log base 10 of 2, and divide it by the log base 10 of 1 plus the increase rate per period.

Doubling Time Definition

Doubling time is a term used to describe the number of periods or the total time it takes a value, usually a financial value, to double its value.

Doubling Time Example

How to calculate doubling time?

  1. First, determine the total increase per period.

    Measure the total increase per period from 0.

  2. Next, calculate the doubling time.

    Using the formula above, calculate the doubling time.


What is doubling time?

Doubling time is the number of periods it takes a given value to double given a constant rate of increase.