# Doubling Time Calculator

The doubling time calculator helps you calculate the period when your given amount will be doubled, given that there is a constant growth rate.

To use the doubling time calculator, enter the increase % per period and the initial amount.

Our tool also shows a graph you can save as an image by right-clicking and saving it as an image.

You can also use this tool to find the doubling time of population, inflation, size of investment, etc.

Doubling time refers to the duration needed to double a given quantity, assuming a constant growth rate. It is also known as the rule of 72.

The doubling time formula is:

Doubling time= log2/log(1+increase)

You might want to use the impairment benefit calculator or Dave Ramsey tool for investment.