DataMystic

Good day.

Please tell me, can i find values by regexp and do math with it?

For ex - converting lb to kg
find (\d\d)lb and replace $1 * 0.45

Yes, use the Calculation filter.

First use the search/replace to find the text as above, and set the Action to, Send $1 to subfilter.

Then add the calculation filter as a subfilter.