Number of Periods (NPER) Calculator

LAST UPDATE: October 8th, 2019

What is a Period?

In the concept of the time value of money, a period is an amount of time between either compounding periods or payments.
Each period represents a payment of an annuity (or perpetuity) and a time when the financial stream compounds.

Number of Periods Calculator

Number of Payments Formula – How the Number of Payments are Calculated

This calculator does not use a specific formula to calculate the number of payments. It calculates them by using a test number to calculate a present value, then testing the result against the entered present value. Depending on the result, it tests another test number until it comes to a present value that is the same as the entered present value.

The upper bounds of the test number are 11,000 periods and the lower bounds are 0.001 periods.

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