determine the height of div element for A4 size paper dimensions

Is there a way to calculate how many A4 papers would fit into a div on my website? I am aware that the size of an A4 paper in pixels varies depending on the screen's DPI. I am exploring methods to determine the user's screen DPI, convert it to A4 page dimensions in pixels, and then divide my div's height by this value to estimate the number of pages using JavaScript or jQuery. Is this a viable approach, or are there other alternatives available? Furthermore, how can I identify a screen's DPI and convert it to pixels?

javascriptjquerycss

Answer №1

One method to determine the user's screen DPI is by using the following code:

<div id='testdiv' style='height: 1in; left: -100%; position: absolute; top: -100%; width: 1in;'></div>

Then, you can calculate the DPI values as follows:

dpi_x = document.getElementById('testdiv').offsetWidth;
dpi_y = document.getElementById('testdiv').offsetHeight;

console.log("dpi_x: "+dpi_x+", dpi_y:"+dpi_y);

REFERENCE

For further information, you may want to check out this resource.

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