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`n = (log(FV) - log (PV)) / (log(1+i/1200))`

Enter a value for all fields

The **Number of Periods Required** calculator computes the number of periods (months) required for a Present Value to compound at a fixed interest rate to reach a specified Future Value.

**INSTRUCTIONS:** Choose units and enter the following:

- (
**PV**) Present Value, initial value prior to compounding interest. - (
**FV**) Future Value, ending value after compounding interest. - (
**i**) Annual Fixed Interest Rate - interest rate is entered as percentage; i.e., enter 4.5 for a 4.5% interest rate.

**Number of Periods (n): **The calculator returns the number of months required. However, the can be automatically converted into other duration units (e.g. years, weeks or days) via the pull-down menu.

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