Unit Converter

Simple and powerful toolbar popup with unit conversion. Supports Area, Length, Mass/Weight, Pressure, Force, Speed, Temperature, Time and Volume conversions. Convert imperial to metric and vice versa.

Total ratings

4.35 (Rating count: 17)

Review summary

These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Very complete for usual metric conversions
  • Simple and handy user interface
  • Excellent functionality for very big or very small units
  • Highly useful and thorough unit conversions
Cons
  • Lacks context menu and unit detection
  • Decimates imperial length units, only providing pure decimal form
  • Detected as unsafe by Avast antivirus
  • Incompatibility with newer Firefox standards after updates
Most mentioned
  • User interface simplicity
  • Functionality for metric conversions
  • Concerns about safety and antivirus detection
  • Limitations with imperial conversions
See reviews for Unit Converter on Firefox Browser Add-ons
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Recent reviews

Recent rating average: 4.20
All time rating average: 4.35
Upgrade to see all 17 reviews

Rating filters

5 star
65% (11) 4 star
18% (3) 3 star
12% (2) 2 star
0% 1 star
6% (1)
Date Author Rating Comment
2024-08-20 Frantz Useless, no context menu, no unit detection, even no selected number detection... It's basically a separate app in your browser with very poor ergonomics
2024-03-25 Larwick
2023-06-16 arnofly Very complete, so complete if you are looking for an light daily convertor for usual metric conversions.
2023-06-14 aptharsia
2023-01-23 Firefox user 13366226
2022-12-23 Firefox user 13817324 While good for most conversions, it misses the most essential aspect of lengths in imperial, which is that feet are given in feet/inches (for example, a meter is just over 3 foot 3.37 inches). Unfortunately, this add-on gives the conversion only in pure decimal form, which is awkward and inconvenient. It gives a meter as 39.37 inches or 3.28 feet, neither of which are very useful. Likewise if you wanted to go in the other direction but were given something like 8ft 7in, you'd have to whip out a calculator just to figure out what you're supposed to put in for feet or inches, but at that point you may as well keep a conversion chart on hand and just do the math yourself. Otherwise, this is perfectly functional and quite useful for very big or very small units, but base 12 units aren't really handled the way that they should be.
2022-10-12 Ishka Most useful add on ive ever used, so handy and simple.
2022-03-19 Seän Shepherd
2020-10-19 eUROs Excellent! It does it job very well. This is what I was looking for among many other similar addons. Firefox must fix the search engine for extensions relevance, so we can find specific extensions faster and easier. It took me some minutes to end up on this add-on.
2020-09-21 黒崎十兵衞 • (Jubei Kurosaki)
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