# RPN Calculator

> 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. If you've used HP calculators, this extension is for you.

Canonical page: [https://chrome-stats.com/d/rpn-calculator](https://chrome-stats.com/d/rpn-calculator)

## Overview

- **ID:** `rpn-calculator`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Mike Conca
- **Category:** other
- **Daily users:** 30
- **Weekly downloads:** 2
- **Rating:** 3.25 / 5 (8 ratings)
- **Version:** 1.2resigned1
- **Last updated:** 2024-04-25
- **First published:** 2017-09-26
- **Size:** 29 KB
- **Data as of:** 2026-09-13
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/rpn-calculator/)

## Description

RPN Calculator is a Firefox add-on that adds a convenient reverse Polish notation (RPN) calculator as a browser action button. It allows users to perform calculations using postfix notation, which requires fewer keystrokes for extended operations. If you've used HP calculators, this extension is perfect for you.

## Rankings

- #20,598 — Overall
- #16 — calculator
- #22 — calculus

## Safety

- **Risk impact:** Very low risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- This permission has no access or impact on the user's system or data, thus carrying no risk.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/rpn-calculator)