Do unit conversion conveniently at the current selected text
Select any text by mouse which includes a quantity (in Arabic numerals) with a unit, this "Unit Convert Selection" will automatically convert it to all supported units by displaying a bubble floating around the selected text. It's quick and easy. There is no need to select "from" and "to" in other conventional unit conversion tools.
Unit conversion is done by "converts-unit" utility at https://github.com/ben-ng/convert-units