The RPNcalc 12c is a full featured financial and business RPN calculator.

All Features: at a glance:

• Display:
∙ Fixed number format
∙ Scientific number format
∙ Status annunciators

• Math:
∙ +, -, ×, ÷, %, 1/x, root, x^y, ln, e, ...and many more
∙ Integer truncation
∙ % change

• Statistical:
∙ Mean standard deviation of 2 variables
∙ Summation
∙ Linear regression
∙ Correlation coefficient
∙ Factorial

• Time Value of Money:
∙ Number of payments
∙ Interest rate
∙ Present Value
∙ Payment
∙ Future Value

• Cash Flow Analysis:
∙ Net present value
∙ Internal rate of return

• Amortization:
∙ Accumulated Interest
∙ Balance

• Depreciation:
∙ Straight line
∙ Sum of the years digits
∙ Declining balance

• Bonds and calendar functions:
∙ Bond price
∙ Bond yield
∙ Date arithmetic / calendar functions

About RPN:
The Reverse Polish Notation is a mathematical notation in which operators follow their operands. It does not need any parentheses as long as each operator has a fixed number of operands.

What’s New

Version 2.1

- macOS Mojave support
- Miscellaneous bug fixes and stability improvements

Ratings and Reviews

1.0 out of 5
1 Rating

1 Rating

Cameron King ,

No shortcuts, not a serious calculator

This is little more than a toy, or an app to experiment with or learn how to use an HP-12c. It does not come with any useful shortcuts, which makes computation a chore. The mouse must be used to access almost every feature. I would not reccomend this app to anyone needing to do serious work. I will be requesting a refund.

efether ,

Why the "RUNNING" between each entry?

It's a HP 12C emulator and it works just like an HP 12C. However, the one glaring annoyance is that it displays "Running" EVERY time it runs a calculation. I don't mean it displays it for a split second as the Intel I7 processor in my MAC crunches the number…no…it flashes "running" for 3 to 20 seconds (not a typo). EVERY TIME! It's hugely annoying, as there is no possible way the processor in my Mac is slower than the Voyager/ARM processor in the real 12C. My real HP12C is faster than this app running on a Mac with a quad-core I7 processor and 16GB of memory. Seriously?!?

Brother Corporate ,

Remember to turn it on

The calculator has an on/off button and ships with it turned off. I don’t know why the author decided to give it an on/off button and especially why it was shipped turned off.

Copy/paste isn’t enabled, which is quite bothersome. The bond calcs I tried showed the Running status for about as long as my 12c. It would be nice if the prefrences let you turn this off.

Also, the border seems a little thick.


bitPUNCH e.k.
461.4 KB

OS X 10.11 or later, 64-bit processor



Age Rating
Rated 4+
© bitPUNCH e.K. 2013-2019


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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