# Simple Calculator Extension

> A lightweight calculator for Firefox: use the popup, or double-click any editable field on a site you've allowed to calculate inline.

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

## Overview

- **ID:** `simple-calculator-extension`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Wesley-Blake
- **Category:** other
- **Daily users:** 1
- **Weekly downloads:** 1
- **Version:** 1.0.0
- **Last updated:** 2026-07-22
- **First published:** 2026-07-19
- **Size:** 23 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/simple-calculator-extension/)
- **Website:** [https://github.com/Wesley-Blake](https://github.com/Wesley-Blake)

## Description

This is a simple calculator that uses the keyboard for building an expression to evaluate. Once you press enter, the result is displayed and copied to your clipboard. Additionally, if you give it permission to access a site, double clicking on a field will pop up a similar expression field, on pressing enter will replace that field with the result and copies it to your clipboard.

Some additional features are light/dark theme toggle, viewing a list of all sites given permission, revoking permission (as you would expect), adding a previous expression you entered to your current expression by selecting the item from the history field below.

## Rankings

- #126,013 — Overall
- #176 — calculator
- #231 — calculus

## Permissions and access

### Permissions

- `activeTab`
- `storage`

## Safety

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

### Analysis details

- 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).

## Similar extensions and apps

- [Simple Calculator](https://chrome-stats.com/d/simple-calculator-v2)
- [Simple Calculator](https://chrome-stats.com/d/simple-calc) — 1 users
- [Simple Calculator](https://chrome-stats.com/d/simple-calculator) — 1 users, 1.00 / 5
- [Simple Calculator](https://chrome-stats.com/d/simple-basic-calculator-tool) — 1 users
- [Simple Calculator 1](https://chrome-stats.com/d/simple-calculator-1) — 1 users, 4.63 / 5
- [Quick Calculator Easy](https://chrome-stats.com/d/quick-calculator-easy) — 1 users
- [SimplesimpleCalculator](https://chrome-stats.com/d/simplesimplecalculator) — 1 users
- [Quick floating web calculator](https://chrome-stats.com/d/quick-floating-web-calculator) — 1 users
- [Tiny Calculator Lite](https://chrome-stats.com/d/tiny-calculator-lite)
- [Simple Calculator](https://chrome-stats.com/d/simple-calculator-webextension) — 270 users, 3.75 / 5
- [Scientific Calculator](https://chrome-stats.com/d/scientific-calculator-addon) — 5 users
- [Calculator](https://chrome-stats.com/d/s-calculator) — 137 users, 5.00 / 5

---

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