Question about HP 12c Calculator

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For my HP 12C (not a platinum) how do i get back into RPN mode?

Can not get back to RPN mode

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  • Anonymous Mar 20, 2014

    how do i get out of RPN mode on a hp12c

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I checked the manual, the image of the face of the calculator and there is no way to change the entry mode from RPN to Algebraic. Your calculator is still in RPN, it is the only mode it has. Reset it.

Posted on Mar 19, 2014

  • k24674 Mar 19, 2014

    For the 25th and 30th anniversary editions press f followed by EEX

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1 Answer

How do i get the ALG below the numbers to go away?


Your HP 12c Platinum is in Algebraic mode. To switch back to RPN mode, press f then CHS.

Oct 15, 2014 | HP 12c Calculator

1 Answer

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.

Apr 23, 2014 | HP 12c Calculator

1 Answer

I have a 12C (not a Platinum!), and I can not get back to RPN mode


I checked the manual, the image of the face of the calculator and there is no way to change the entry mode from RPN to Algebraic. Your calculator is still in RPN, it is the only mode it has. Reset it.

Mar 19, 2014 | HP PSC 1210 All-In-One InkJet Printer

1 Answer

How to get out of rpn mode


On a 12C Platinum, press f [ALG]

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

Feb 15, 2013 | HP 12c Calculator

1 Answer

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

1 Answer

Stuck in alg mode


Assuming you have a 12C Platinum, press f [RPN] to switch from the algebraic to the RPN mode. [RPN] is the shifted function of the CHS key on the top row of the keyboard.

Jun 21, 2011 | HP 12c Calculator

1 Answer

Alg has shown up on my 12c how do i get it back to orginial format


I presume you're on a Platinum since the non-Platinum 12Cs don't have an algebraic mode.

To switch back to RPN, press f [RPN]. That's the yellow "f" key followed by the "CHS" key.

May 18, 2011 | HP 12c Calculator

1 Answer

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.

Mar 23, 2011 | HP 12c Calculator

1 Answer

HOW DO I GET OFF RPN


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].

Aug 23, 2010 | HP 12c Calculator

1 Answer

How do I get the 12C off the "equal" sign configuration. It's not computing by reverse polish notation.


I assume we're dealing with a 12C Platinum, since a 12C doesn't have a +"equal" sign configuration_.

Press f then RPN.

Feb 24, 2010 | HP 12c Calculator

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