Time period needed to double money


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


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