How to calculate the size of a cell or row in an html table in php?

Question

PHP

The bottom line is that a data set (nomenclature) is generated, which should then be split into A4 sheets (html files) from which png is generated and after that a pack of png files is sent to the server.
Everything is implemented, but there is a problem with the fact that the sheets have different heights due to the fact that the rows are different. Somewhere the line is one line, somewhere with a long name the line is tripled.
Does anyone have similar experience?
Z.Y. Everything is generated on the server, outside the browser.

Answer 1

A monospace font was used where the character occupied 5px, and as a result, with a column width of 100px, 20 characters fit into 1 line, 20-40 are 2 lines, etc.

Answer 2

Usually generate PDF, not PNG.
There are no problems with PDF printing.

Answer 3

as an addition, if you need PNG so much: generate PDF and convert page by page to PNG