The NPER function calculates the number of payment periods for an investment based on constantamount periodic payments and a constant interest rate.
Sample Usage
NPER(2,500,40000)
NPER(A2,B2,C2,D2,1)
Syntax
NPER(rate, payment_amount, present_value, [future_value, end_or_beginning])

rate
 The interest rate. 
payment_amount
 The amount of each payment made. 
present_value
 The current value of the annuity. 
future_value
 [ OPTIONAL ]  The future value remaining after the final payment has been made. 
end_or_beginning
 [ OPTIONAL 0
by default ]  Whether payments are due at the end (0
) or beginning (1
) of each period.
Notes
 Ensure that consistent units are used for
rate
andpayment_amount
. For example, a car loan for 36 months may be paid monthly, in which case the annual percentage rate should be divided by 12 and thepayment_amount
is the amount of each monthly payment. On the other hand, a different type of loan of the same length and principal might be paid quarterly, in which case the annual percentage rate should be divided by 4 and the amount paid each period would be adjusted accordingly..
See Also
PV
: Calculates the present value of an annuity investment based on constantamount periodic payments and a constant interest rate.
PPMT
: The PPMT function calculates the payment on the principal of an investment based on constantamount periodic payments and a constant interest rate.
PMT
: The PMT function calculates the periodic payment for an annuity investment based on constantamount periodic payments and a constant interest rate.
IPMT
: The IPMT function calculates the payment on interest for an investment based on constantamount periodic payments and a constant interest rate.
FVSCHEDULE
: The FVSCHEDULE function calculates the future value of some principal based on a specified series of potentially varying interest rates.
FV
: The FV function calculates the future value of an annuity investment based on constantamount periodic payments and a constant interest rate.