autoConvert - you select, it convertsby Aditya Bhaskar

autoConvert converts units, time zones, and currencies, when you select them on a webpage. Selecting metric units (e.g. 16 km) converts them to the imperial units (e.g. 10 mi), and vice versa (10 inch to 25 cm). Time zones are converted to the detected local time zone. Currencies are converted to specified local currency.

Conversions are automattic, and appear in a corner of the page as soon as you select any text containing convertible units.

You may also convert any text by typing or pasting in the extension popup (press the extension button in the toolbar)

A list of supported units, currencies and time zones is available here.

*Converts up to 6 values in a selection. Unlimited conversions in popup.

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Update 18 Oct 2018:

1. Currency conversion for common symbols - $, £, ¥, Rs, kr - converts based on top-level-domain of the website.

Update 17 Oct 2018:

1. Free trial of Currency conversion enabled for everyone.
2. Added option to convert to a third currency or time zone in popup (premium / free trial only)
3. Conversions appear in the same order as in text

Update 2 Oct 2018:

1. Enabled currency conversion trial for more users.
2. Added 'tbs' as alternate unit for 'tablespoon'.

Update 18 Sep 2018:

1. Show values in both Pounds/lb and Stones/st (if more than 1stone) when converting mass to Imperial units.
2. Limited test of currency conversion - available to a few randomly selected users.

Update 13 Sep 2018:

1. Keyboard shortcut to open extension window (Ctrl/Cmd + Period).
2. Pin text in conversion box to prevent it from clearing when the window closes.

Update 11 Sep 2018:

1. Convert any text (typed or copied from other apps) using the extension window.
2. Conversion in extension window allows unlimited conversions at a time.

More update notes here: Update Notes