The Excel FV function calculates the Future Value of an investment with periodic constant payments and a constant interest rate.
The syntax of the function is :
Where the arguments are as follows:
rate    The interest rate, per period 
nper    The number of periods for the lifetime of the annuity 
[pmt]   
An optional argument that specifies the payment per period
(if the [pmt] argument is omitted, the [pv] argument must be supplied)

[pv]   
An optional argument that specifies the present value of the annuity
 i.e. the amount that a series of future payments is worth now
(if the [pv] argument is omitted, it takes on the default value 0.
Also, if [pv] is omitted, the [pmt] argument must be supplied)

[type]   
An optional argument that defines whether the payment is made at the
start or the end of the period.
The type argument can have the value 0 or 1, meaning:
0  the payment is made at the end of the period
If the type argument is omitted, it takes on the default value of 0 (denoting payments made at the
end of the period).
1  the payment is made at the beginning of the period 
The spreadsheets below show examples of the Excel Fv function. In each case, the format of the function is shown in the spreadsheet on the left and the result is shown in the spreadsheet on the right.
The following spreadsheet shows the Excel Fv function used to calculate the future value of an investment of $1,000 per month for a period of 5 years. The present value is 0, the interest rate is 5% per year and the payments are made at the end of each month.
Formulas:

Results:

Note that, in this example :
The example below shows the Excel Fv function used to calculate the future value of an investment of $2,000 per quarter for a period of 4 years. The interest is 10% per year and each payment is made at the start of the quarter.
Formulas:

Results:

Note that, in this example :
More details and examples of the Excel Fv function are provided on the Microsoft Office website.
If you get an error from the Excel Fv Function, this is most likely to be the #VALUE error:
#VALUE!    Occurs if any of the supplied arguments are nonnumeric 