RPN Calculator

RPN Calculator

Adds an RPN calculator as a browser action button.

What is RPN Calculator?
"RPN Calculator" is a Chrome extension that adds an easily accessible reverse Polish notation (RPN) calculator in your browser. Renowned for requiring fewer keystrokes in extended operations, this calculator takes on an approach contrary to traditional calculations by placing operators after the operands. Despite minor issues with focus and keyboard-only operation, it emits the essence of popular 1970s and 80s HP RPN calculators.
Users: 782 ▲ 13
Rating: 5.00 (7)
Version: 1.0 (Last updated: 2017-10-04)
Creation date: 2017-10-04
Risk impact: Very low risk impact
Risk likelihood: Very low risk likelihood
Manifest version: 2
Size: 12.57K
Stats date:

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Not available on Edge
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This extension adds a convenient reverse Polish notation (RPN) calculator as a browser action button. Also called postfix, RPN calculators take their operators after the operands.

For example, to get the sum of two and three on a normal calculator, you would hit "2 + 3 =". On an RPN calculator, you would hit "2 Enter 3 +". In general, RPN calculators require fewer keystrokes over a series of extended operations.

It may seem strange at first, but once you get used to it, you'll never go back. HP made a series of extremely popular RPN calculators back in the 1970's and 1980's

Known Issues:

  1. Calculator doesn't automatically get focus when displayed.
  2. Keyboard only. Clicking on keys and commands doesn't work.
User reviews
This is just the thing I needed! I use it when grading PDF documents in Canvas. I have been an HP calculator user from all the way back when HP was a good company. I had been using my trust 48GX for this, but it's overkill for adding up grades. It's much more convenient to have RPN entry directly in my browser, and this hits the sweet spot of the functions I need vs what is easy to use via keyboard. I really like the onscreen reference too!
by Robert Lowe Robert Lowe, 2022-09-12

Great calculator, just wish I could copy/paste the input/output.
by Jared M Johnson Jared M Johnson, 2021-07-30
View all user reviews
Risk impact

RPN Calculator is safe to use. It does not request any sensitive permissions.

Risk likelihood

RPN Calculator has earned a good reputation and can be trusted.

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