New: autoConvert Select for Chrome & Firefox

Automattic unit conversion

For the wanderers, the readers, the chefs and bakers, the measuring, tinkering DIYers, and for anyone else who struggles to convert feet to cm, or ºC to ºF, or wonders how many grams is it when the recipe says a cup of sugar in the cake.

With autoConvert Select, just select the text you convert, and the conversion is right there in the corner of the browser. No clicking, no searching. Right there… automagically.

Select a value in metric units, say 16 km, and the conversion will be imperial (10 miles). Select a value in the old, imperial units, say 22ºF, and the conversion will be into metric (-5.6ºC).

That’s all, folks!

Get it here on Chrome and Firefox.

Please share your feedback, including suggestions and any bugs you find using this link.


  1. autoConvert Select only converts units. Unlike the older autoConvert for Chrome, it does not convert currencies yet. I am still looking for a free source for currency rates before I can provide currency conversion.
  2. autoConvert Select converts the first six values in a selection. You may have to select multiple times to see more conversion.
  3. autoConvert Select supports all websites – including the newer React based websites that the older extension used to hang on.