The lump sum number of periods calculator is used to calculate the number of periods (n), it takes to increase the present value of a lump sum to its future value at a discount rate of i%.

# Number of Periods

## Simple Interest Doubling Time Formula

## Number of Periods Annuity Formula FV

This number of periods annuity formula FV calculates the number (n) of annuity payments required to provide a given future value (FV). The annuity formula assumes payments (Pmt) are made at the end of each period, and a discount rate i is applied.

## Number of Periods Annuity Formula PV

This number of periods annuity formula PV calculates the number (n) of annuity payments required to provide a given value today PV (present value). The annuity formula assumes payments (Pmt) are made at the end of each period, and a discount rate i is applied.

## Doubling Time Formula Continuous Compounding

## Excel NPER Function

The Excel NPER function is one of many Excel financial functions, and can be used to calculate the number of periods for a lump sum, annuity or annuity due to grow to a future value. In addition the function can also be used to calculate the number of periods it takes for a loan to be repaid.