# Doubling Time Calculator

## About Doubling Time Calculator (Formula)

A doubling time calculator is a tool used to calculate the amount of time it takes for a quantity to double. Doubling time is used in various fields such as finance, population growth, and epidemiology. It can be used to calculate the time it takes for an investment to double, the rate of population growth, or the rate of spread of an infectious disease. The formula for calculating doubling time is:

Doubling Time = (ln(2) / ln(1 + (r/100))) / t

Where:

• r is the growth rate as a percentage (e.g. 5% = 0.05)
• t is the number of time periods (e.g. years)

Doubling time calculators are commonly used to quickly and easily calculate the doubling time for a given rate of growth or decline. They can be found in spreadsheet software or as online calculators, and can be used to calculate the doubling time for a given rate and time period.

It’s important to note that the growth rate entered should be in decimal form to be used in this formula. For example, if you want to calculate the doubling time with 5% growth rate, you need to enter 0.05 instead of 5.