Rule of 72

Determine how long an investment will take to double, given a fixed annual rate of interest. By using the Rule of 72 calculator, find out how many years it will take for an initial investment to duplicate itself.

Rule of 72 calculator provides you a quick and easy way to share your Rule of 72 calculation scenarios with a friend or family member using the email send feature. With a quick touch of the Send button you can send the Rule of 72 calculator results including the data points used in the calculation.


Calculates and Displays
- Federal and state tax rates
- Number of years required to double money at applied tax rate
- Interest rate required to double money within applied number of years

Features
- Easy key pad entry and slider entry options
- Real-time calculation display
- Result sharing via email