# MetricRules!

> Converts many imperial units (aka Freedom Units) to metric 📏

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

## Overview

- **ID:** `metricrules`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** SpitFire-666
- **Category:** language-support
- **Daily users:** 84
- **Weekly downloads:** 4
- **Rating:** 4.14 / 5 (7 ratings)
- **Version:** 0.7
- **Last updated:** 2026-06-27
- **First published:** 2024-08-01
- **Size:** 47 KB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/metricrules/)

## Description

MetricRules! is a handy Chrome extension that automatically converts many imperial (freedom) units such as miles, feet, yards, pounds, gallons, fluid ounces, pints, mpg, and mph into their metric equivalents. Converted values are highlighted with a 🇪🇺 EU emoji for quick identification, making it ideal for users worldwide who prefer metric measurements. Additionally, this extension is available on Firefox Android, enhancing unit clarity across devices. Built as a fork from a popular open-source project, MetricRules! bridges measurement gaps effortlessly while browsing.

## Rankings

- #12,703 — Overall
- #28 — rule
- #61 — united

## Permissions and access

### Content script matches

- `*`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- 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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- [Metrication](https://chrome-stats.com/d/metrication) — 79 users, 3.64 / 5
- [Imperial to Metric](https://chrome-stats.com/d/imperial-to-metric) — 7 users, 4.75 / 5
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- [AutoMetric](https://chrome-stats.com/d/autometric) — 4.00 / 5
- [Elite Measure Tool](https://chrome-stats.com/d/elite-measure-tool)
- [MeasureMate](https://chrome-stats.com/d/measuremate) — 14 users, 5.00 / 5

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