PDA

View Full Version : What is the size of A4 in px?



ianhull
10-12-2005, 05:40 AM
Hi guys, does anyone here know the size of A4 in pixels?

I just can't seem to get it right and I have searched google aswell but there seems to be nothing.

Thanks in advance.

Corey
10-12-2005, 06:06 AM
A4 is a document format, as a screen image that's going to depend on the image resolution, for example an A4 document resized to:

72 dpi (web) = 595 X 842 pixels
300 dpi (print) = 2480 X 3508 pixels (This is "A4" as I know it, i.e. "210mm X 297mm @ 300 dpi")
600 dpi (print) = 4960 X 7016 pixels

And so forth. FWIW document formats like A4 are described by their print dimensions (millimeters), which is a whole different thing than screen images (pixels) so that's why you don't see anyone using pixels to describe A4. :yes

JimS
10-12-2005, 06:12 AM
I think that it depends on the resolution you are using. The physical measurement of an A4 page stays constant at 210 X 297 mm, or approximately 8.25 X 11.75 inches.

At 300 dpi, it should be 2475 X 3525 ((300 X 8.25) X (300 X 11.75))

Of course, you might want to subtract for your margins.

HTH

JimS
10-12-2005, 06:17 AM
Yea, what Corey said. :)
Incidentally, I noticed that our pixel count at 300 dpi differs. I didn’t do the math, just pulled the numbers from Google, so Corey’s are probably closer to fact.

Corey
10-12-2005, 06:50 AM
I think the ISO standard for A4 is 210mm X 297mm (8.27 in. 11.69 in.):
http://www.paper-paper.com/A4-1.html

That's the main thing regardless of pixel resolution, is that it must print at "8.27 in. 11.69 in." to be A4. :yes

ianhull
10-13-2005, 07:53 AM
Thanks for that guys, I didn't realise that it had to do with the dpi aswell.

You do learn something new every day....and more than one thing if you come to IR.

Thanks again for your help.

Much appreciated.

Kind regards

Corey
10-13-2005, 01:23 PM
No problem, the main thing to remember is that there are print resolutions and screen resolutions, and they're different. At first I found that a bit tricky too. :) Anyhow when you are in Photoshop if you select the zoom tool (shortcut "Z") and then right click you'll see a "Print Size" option, this allows you to view your document at it's print (instead of screen) size anytime. Also if you open the "IMAGE SIZE" dialog it will give you the stats for both the screen size as well as the print size for any image. :)