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Time Value of Money with Odd Periods and Simple Interest Calculator

This calculates time value of money calculations. It stores the interest rate as a periodic rate, ("i%" key instead of "I/YR" key).

It is similar to the 12CP calculator in calculations involving N with fractional parts.
For calculations with compound interest (HP 12C 'C' status on) use the Time Value of Money with Odd Periods and Compound Interest Calculator)

This calculator uses the second formula in Time Value of Money Compound Interest Formulas.


Loan with Odd Period Example

What are the monthly payments for a 45,000 loan for 36 months and 16 days years at 5% per year?

Value Keystrokes (RPN) Keystrokes (CHN) Display Description
  shift, clr f     Clears the financial variables. This does not change the P/YR or C/YR.
  shift, END     set the payment mode to END.
  16 ENTER
30 ÷
36 + N
16 ÷ 30
+ 36 N
36.53 Sets the number of payments to 36.533
5 shift, 12÷ shift, 12÷ 0.42 Sets the periodic interest rate.
45000 PV PV 45,000.00 Stores the loan amount, PV.
  PMT   -1,351.69 Calculate the monthly payment.


This is the same as the 12CP with "STO+EEX" set so the "C" status is not displayed.

See the Time Value of Money Examples for additional information on this calculator.

For the shift keys:

Using the "long press" gesture will display a hint about any key. (Video: Displaying a hint) You can inspect the Key Details to see the formulas and functions for any key.

Percentage Change and Percent of Total Keys

The Date Keys

Calculation Methods Used by CALC 1

Also see

Storing and Recalling Numbers.

Register Arithmetic