# PDURATION function

This article describes the formula syntax and usage of the **PDURATION** function (function: A prewritten formula that takes a value or values, performs an operation, and returns a value or values. Use functions to simplify and shorten formulas on a worksheet, especially those that perform lengthy or complex calculations.) in Microsoft Excel.

## Description

Returns the number of periods required by an investment to reach a specified value.

## Syntax

PDURATION(rate, pv, fv)

The PDURATION function syntax has the following arguments.

**Rate**Required. Rate is the interest rate per period.**Pv**Required. Pv is the present value of the investment.**Fv**Required. Fv is the desired future value of the investment.

PDURATION uses the following equation, where specifiedValue is equal to fv, and currentValue is equal to pv:

## Remarks

- PDURATION requires that all arguments are positive values.
- If argument values are not valid, PDURATION returns the #NUM! error value.
- If arguments are not using valid data types, PDURATION returns the #VALUE! error value.

## Example

The workbook below shows examples of this function. Inspect them, change existing formulas, or enter your own formulas to learn how the function works.

To work more in-depth with the example data in Excel, download the embedded workbook to your computer, and then open it in Excel.