SDL Trados Studio 2019 introduced "Tell Me" functionality, which helps you find features in Trados Studio. 

Another benefit of this functionality, is that it includes an API, which allows developers to add to the functionality of Trados Studio 'Tell Me'

The QuickInfo plugin does just that, by extending the default "Tell Me" functionality to provide various useful bits of information such as unit conversion, maths calculation, airport codes, Unicode description and more.

Simply click on Tell Me and start your search query with '@info' and then the additional query- for example-

This is really useful when you need a quick calculation/conversion whilst translating, without the need to open your browser.

Trados QuickInfo supports  for example-

Unit conversions:
Weight: pounds to kg and vice versa (190 pounds, 200lb, 43 kg in lb)
Temperature: fahrenheit/celsius (75f, 75 f, 75 fahrenheit, 23c, 23 c, 23 c to f)
Distance: 12 miles, 100 miles in km
Speed
Volume
Area: 1670 sq.ft
Fuel efficiency (29mpg)

Curency conversion.
The following currencies are supported: EUR, GBP, USD, RUB, CZK, ILS, CAD, CHF, RON, AUD, PLN, HUF, JPY, CNY

Hex/decimal (just type a number)
Colours

List of colors: color, colors
Color conversions - convert an RGB triplet to Hex color or hex color to RGB (23 145 175, #eeaaf0)
Misc.

Factor an integer 2520
Generate a random Guid guid
My IP address ip
Math/arithmetic expressions (24 * 365) * 4 - 1, 22/7 - pi, rnd, Random(100)
Quick sum/average/product of a list of numbers, sort a list (separated by space or comma) 3 7 21 3 3 2 11
Unicode: type a codepoint to see what char it is: U+2021 \u3333
Url decode: 2%20%2B%203 shows the original string (fun exercise: 2%2525252520%252525252B%25252525205

The plugin is also opensouorced providing a great tool for other developers as they can see how this functionality is used, or even contribute to this one with new bits of helpful information to extend its usefulness.