Printing common sense: How many pixels should A4 paper need on the monitor?

The size of A4 paper is 210mm*297mm, which is 21.0cm*29.7cm, and 1 inch = 2.54cm, if the screen DPI resolution is 72 pixels/inch, convert it: equivalent to 1cm can be rendered (72px/2.54cm) = 28.34px

The following are the pixel sizes of A4 paper on the screen at some common resolutions:

When the resolution is 72 pixels/inch, the pixels of the A4 paper size image are 595×842;

When the resolution is 96 pixels/inch, the pixels of the A4 size image are 794×1123; (default)

When the resolution is 120 pixels/inch, the pixels of the A4 paper size image are 1487×2105;

When the resolution is 150 pixels/inch, the pixels of the A4 paper size image are 1240×1754;

When the resolution is 300 pixels/inch, the pixels of the A4 paper size image are 2480×3508;

Other sizes, generally standard printing 300dpi:

The pixels of the image of the size of A4 paper are 2480×3508;

The pixels of the image of the size of A3 paper are 4960×3508;

The pixels of the image of the size of B3 paper are 3248×4300;

The pixels of the image of the size of B4 paper are 3248×2150.

Note: How to check the DPI of your monitor in win7 environment, see the figure below

In order to facilitate the conversion, I wrote a simple code:

<!doctype html>
<html>
<head>
<title>Centimeters to Pixels</title>
<script type="text/javascript">
    function convert(){
        var dpi = document.getElementById("DPI");
        var cm = document.getElementById("txtCM");
        var px = (parseFloat(dpi.value)/2.54)*parseFloat(cm.value);
        px = px.toFixed(3);
        document.getElementById("txtPX").value=px;
    }
</script>
</head>
<body>
    CM:
    <input type="text" id="txtCM" value="1" />
    DPI:
    <input type="text" id="DPI" value="96" />
    PX:
    <input type="text" id="txtPX" />
    <input type="button" value="计算" onclick="return convert();"/>
</body>
</html>

Printing common sense: How many pixels should A4 paper need on the monitor?

Guess you like