Question about HP 12c Calculator

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My hp 12c platinum can't derive the correct answer for any of the NPV problems I'm currently studying for my CFP exam. It can perform all of the other basic functions correctly -- IRR, PV, FV, PMT, etc., but not NPV. Any ideas? Many thanks, Jonathan

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  • kakima Mar 21, 2011

    There are a lot of things you should check: the begin/end setting, the number of payments per year, the number of compounding periods per year, and more.
    Could you post an example or two, with both the answer you expect and the answer you get?

  • jelabarre Mar 22, 2011

    I am not a novice hp 12c platinum user nor of average IQ. I have already checked all of the likely references in the owner's manual and searched the common online Q&A threads. I'm in need of expert commentary; that's why I turned to this website. Thanks / respectfully, Jonathan

  • jelabarre Mar 22, 2011

    Thanks for your help. After reviewing your link and a number of trial and error input combinations of my own, I was able to finally figure out this dilemma. For whatever reason, to get a hp 12c to properly to derive a NPV answer it needs an initial (T=0) cash flow amount input into the CFo register (using the [blue] [g] shift key). All of the references in the hp 12c manuals and other online threads reference inputting the initial CF amount as the first entry into the CFj register. However, this does not work. Thanks for your thoughts. They provoked thought that led me to the solution!!! Best, Jonathan

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The button pad could be bad, or you could have a bad portion of a chip, hard to tell. I've never taken a 12C apart, but it's probably possible to take apart and possibly clean the button pad, however, I believe these devices had a protective membrane on the button pads to prevent anything from getting to the pad contacts to contaminate them, so trying to clean it might be a waste of time and in vain.
You might review the procedure for performing NPV calculations on the following web page:
http://h20331.www2.hp.com/Hpsub/downloads/HP12CNPV.pdf
They mention something about the n register needing to be cleared, so it might be worth reviewing.
Sorry I don't have a specific solution, but hope this helps.

Posted on Mar 22, 2011

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Hi,

Welcome to Fixya. If you're having problem problems about the result of NPV perhaps the userguide of HP 12c Calculator can help you. You can refer to page 74.

HP 12c Calculator Manual


If you have questions please let me know. Thanks for using Fixya.

Posted on Mar 21, 2011

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How to calculate mortgage pmt using hp. I cannot remember the sequence


There is an excellent computer-based tutorial for the HP 12c Platinum on HP's website (although the sequence for TVM calculations is the same for the original 12c).
Download it and have a look. It will guide you key-by-key through the steps.

calculate-mortgage-pmt-using-hp-cannot-rvrejqbjq4zuw4cbinsyjvsy-3-0.png
http://h20331.www2.hp.com/Hpsub/downloads/cbt_12c_platinum.zip

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How do you clear RNP for an HP 12C


I take it you mean a 12C Platinum.

Press f ALG. ALG is the f-shifted function of the EEX key, just above the double-size ENTER key. This will switch the 12C Platinum from RPN mode to Algebraic mode, and ALG indicator will light up instead of the RPN indicator.

To switch back to RPN, press f RPN. RPN is the f-shifted function of the CHS key just above the EEX key.

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The following problem is not difficult, however, I am having trouble calculating the answer using my HP 12c Platinum. Can you please provide a step by step explantation of how to calculate the answer to...


1. Make sure the HP-12C is in compounding mode. Press STO-EEX repeatedly until a tiny "C" appears in lower right of display.
2. Make sure "BEGIN" is NOT shown in the display. If it is, press g-END.
3. Clear financial registers: f-FIN. (That is really the "f" key then kind of the "Clear FIN" key -- I'm sure you'll see it.)
4. Enter zero as "initial investment". CLx, then g-CF0. (You have to do this because the 12C actually computes the "NPV" as an excess or deficit over the entered "initial investment". By entering zero, you force the calculator to just give you the actual net present value.)
5. Your first cash flow is +2.00. So, enter 2.00, then press g-CFj.
6. Next cash flow: +2.10. Enter 2.1, then press g-CFj.
7. Last cash flow: +22.20 (the final value of the stock plus the last dividend payment). Enter 22.20, then press g-CFj.
8. Enter the 10% interest (a.k.a. discount) rate. Enter 10, then press "i".
9. Compute the NPV. Press g-NPV. The answer is indeed 20.23 (at least to two decimal places).

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Get out of rpn mode on hp 12c


On a 12C Platinum, press f [ALG]

On a non-Platinum you're stuck. It has only the RPN mode.

Jan 15, 2013 | HP 12c Calculator

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Do you have advice in calculator choice between HP 12 c and the TI BA II Plus Professional Financial Calculator? Assuming that I get proficient with RPN (which I'm learning now); is one faster than the...


The 12C is more expensive and more powerful than the BAII+Pro. The HP is also programmable, which the TI isn't. Starting from scratch (assuming you've never used a calculator before---a somewhat unreasonable assumption) the TI might be easier to learn, at least initially. But after a certain point, the HP will leave the TI behind. The HP is faster and more capable.

There are at least three different versions of the 12C available. There's the original 12C, the 12C Platinum, and the current 12C. The only way to tell the difference between the two non-Platinums is to look at the battery compartment---the original uses three button cells while the newer uses two coin cells. The newer one is MUCH faster. The Platinum, however, can use RPN or algebraic.

Unless your choice is limited to the 12C or the BAII (by the requirement of an exam, perhaps), you might want to look at the HP 20B and the HP 30B. Programmability aside, they're even more powerful and easier to use and faster than the 12C, and the 30B is also programmable.

There are other considerations, of course. Factors such as the feel of the keyboard, the 12C's landscape orientation as opposed to the others' portrait orientation, etc, are all matters of personal preference.

Disclaimer: I own multiple HP and multiple TI calculators. I tend to use HP calculators for calculating, while I use TI calculators to answer questions here at FixYa.

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I am currently studying for the CFA Level I exam, during which only two calculators can be used: the TI BA Plus II and the HP 12C (or 12C Platinum. I've decided that I want to go with the HP 12C for a...


Personally, I'd go with the regular, or the Plus, staying away from the Platinum. There's nothing on the calculator or package to distinguish the Plus from the regular, but the Plus uses two coin batteries while the regular uses three button batteries. The Plus is just like the regular, except a LOT faster.

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The HP 12c is a purely RPN calculator; it does not have an algebraic mode.

To switch the HP 12c Platinum to algebraic, press f [ALG].

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Having gone over a month with no response, I assume this is no longer a problem.

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My equal sign does not function.


Are we dealing with a 12C Platinum instead of a 12C?

On a 12C Platinum in ALG mode, you don't use the ENTER key at all, but the = key.

Feb 08, 2010 | HP 12c Calculator

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How can i tell the difference b/w hp12c and hp12p. i bought a hp12p from ebay(it's a stupid decision, I know!) and when i solving for IRR, i felt its running quite slow. I think the guy sold me the hp12P...


I couldn't find any reference to a HP calculator model 12p.
There is a HP 12c financial calculator and a 12c Platinum financial calculator.
Check both models (for images, specifications, functions, user guides, etc.) :
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HP 12c Platinum Financial Calculator

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