Time period needed to double money

Description

The present value formula can be rearranged logarithmic way to calculate how many years are needed for the value of the deposit to double. ( For the period of time needed to double an investment, the Rule of 72 is a useful short-cut that gives a reasonable approximation of the period needed).

Related formulas

Variables

tTime to double money in years (not necessarily an integer) (dimensionless)
FVFuture value (dimensionless)
PVPresent value (dimensionless)
iInterest (annual) (dimensionless)