Rule of 72 is often used by financial speech speakers, to help people understand power of compounding. It allows you to calculate the years needed to let your asset grow double at a certain annual rate using only simple divider. Although rule of 72 is convenient, you still need a financial calculator to get the result of more general annual compounding questions. Thus I design this 'Rule of 72 Calculator'. You can get much accurate number than the method of rule of 72.
Rule of 72 Calculator for the year
Rule of 72 Calculator for the required annual rate of return
Rule of 72 Calculator for the final versus initial asset ratio