Business card height and width in pixels on web?

Question

i Need Business card height and width in pixels on web, because i have created business card design by HTML and CSS in my application. here i can give print commend to print business card.

Now whats the width and height in pixel i use, so that it will correctly printed on actual business card size (3.5 and 2 inch)

Answer 1

It should be:

height: 336px
width: 192

=

height: 3.5in
width: 2in

Answer 2

Inches are valid CSS lengths just use those.

Absolute length units represents a physical measurement and when the physical properties of the output medium are known, such as for print layout. This is done by anchored one of the unit to a physical unit and to defined the other relatively to it. The anchor is done differently for low-resolution devices, like screens, and high-resolution devices, like printers.

Length @ MDN

CSS units and dots-per-inch

The unit in/inch doesn't represent a physical inch on screen, but represents 96px. That means that whatever is the real screen pixel density, it is assumed to be 96dpi. On devices with a greater pixel density, 1in will be smaller than 1 physical inch. Similarly mm, cm, and pt are not absolute length.

Some specific examples:

1in is always 96px, 3pt is always 4px, 25.4mm is always 96px.