# CO2 Calculator

> See how much CO₂ emissions and money you save by biking instead of driving!

Canonical page: [https://chrome-stats.com/d/co2-calculator](https://chrome-stats.com/d/co2-calculator)

## Overview

- **ID:** `co2-calculator`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** mbay.dev
- **Category:** privacy-security
- **Version:** 3.0
- **Last updated:** 2025-11-22
- **First published:** 2025-11-19
- **Size:** 146 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/co2-calculator/)

## Description

CO₂ Calculator is a simple, privacy-friendly popup tool that shows you exactly how much CO₂ you avoid and money you save every time you choose your bike instead of your car.

Just enter your daily biking miles and local fuel price → get instant daily, weekly, monthly, and yearly savings in kg of CO₂ avoided and US dollars saved.

Features:
• Works 100% offline
• No permissions, no tracking, no data collection
• Choose your vehicle type (compact, average car, SUV/truck)
• Motivational medal system – become a Gold Eco-Warrior!
• Clean, beautiful design that fits perfectly in Firefox

Every mile you bike matters. Thank you for helping the planet! 🚴💚

## Rankings

- #134,822 — Overall

## Safety

- **Risk impact:** Very low risk impact
- **Risk likelihood:** Moderate 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/co2-calculator)