Metrication

Convert Imperial/US measurements to metric.

Metrication

Extension stats

Users: 419
Rating: 5.00
(4)
Version: 0.0.7 (Last updated: 2020-11-29)
Creation date: 2019-04-27
Risk impact: High risk impact
Risk likelihood:
Manifest version: 2
Permissions:
  • <all_urls>
  • clipboardWrite
  • tabs
  • contextMenus
  • storage
Size: 135.17K
URLs: Website

Other platforms

Not available on Android
Not available on Firefox
Not available on Edge
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Extension summary

Helps users of the metric system by converting and replacing Imperial and US units of measure with metric (SI) units directly within a web page. A hotspot will popup with the original value, conversion workings and potential ambiguities.

Metrication is an add-on for Chrome that identifies Imperial/US customary units and converts them to appropriate metric units.

When an Imperial/US unit is identified, Metrication hides it and inserts an appropriate metric value and unit so that the document reads as if it were originally written for a metric audience.

The replacement metric value and unit are embedded within a hotspot that will popup a small window containing: 1) the original text; 2) the working involved in the conversion to a higher number of decimal places; and 3) any other conversions that may have been possible due to cultural or other ambiguities.

If the user deems the default conversion to be inappropriate, a popup menu will also allow the selection of an alternate conversion or reversion to the original text.

The Metrication add-on attempts to provide "appropriate metric units" by varying the output unit on the scale of the output value and not be fixed to the input unit. For example, "40 miles" will be represented as "64.4 kilometres" whereas "⅛ miles" will be represented as "201 metres". This scaling can also be limited so that values like "30,000 feet" will be represented as "9,144 metres" in line with convention.

Scaling is also applied to decimal places as output values increase. As previously stated, "40 miles" will be represented as "64.4 kilometres" however, "200 miles" will be represented as "322 kilometres" and not as "321.868 kilometres".

The Metrication add-on will detect both full unit names like "feet" and abbreviated unit names like "ft". The add-on will use full names or abbreviated names in its output depending upon which is detected in the input. For example: "40 mi." will be converted to "64.4 km.". This can lead to some false positives: for example, the abbreviation for "font point size" is "pt" however, this could also be seen as an attempt to abbreviate "pint". The popup will explain the conversion used and hopefully the context will reveal that there is no such text size as "5.7 l" (litres).

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User reviews

Used on some cooking website, converted all the ounces, degrees farenheit, inches, etc. perfectly and has tooltips which show the original writing and how they converted it. Amazing!
by Matt Gaskell, 2020-08-25

works on airstream website which list spec of their travel trailers with imperial units with spaces in the numbers.
by Tao Zhang, 2020-08-24

I live in Australia and often need to look at US websites of electronic equipment. The specifications usually do not show metric measurements or weight which is a real pain. This extension has solved that by automagically converting the specifications. Wonderful!
by Peter Blackmore, 2019-03-24
View all user reviews

Extension safety

Risk impact

Metrication requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk likelihood

Metrication may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

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