A4 paper in San Francisco...

Hey, I was wondering where I could track down, or maybe how I’d go about making, an A4 sheet (210x297mm) but converted entirely into pixels—basically just a blank white canvas at that specific resolution?

dustycanyon4 said:Hey, I was wondering where I could track down, or maybe how I’d go about making, an A4 sheet (210x297mm) but converted entirely into pixels—basically just a blank white canvas at that specific resolution?

The question is pretty vague, isn't it?
You could cram any amount of pixels onto an A4 sheet if you really wanted to, right? I mean, technically, math doesn't care about your feelings. But let's be real—if you try to shove a massive, high-res image onto a standard piece of paper, things are going to get weird. It’s like trying to fit a whole Ford F-150 into a compact parking spot in downtown Chicago. You can physically force it, sure, but it's going to look ridiculous and probably break something in the process. Does anyone actually know where the limit is before it just becomes a blurry mess? Probably not without doing some tedious math nobody wants to touch.
And honestly, the whole A4 thing is kind of a joke if you think about it. You can't even really use the full sheet because printers always leave those annoying little 5 or 6 mm margins around the edges where nothing happens. It’s just wasted space. Plus, professional print shops don't even work like that. They aren't sitting there feeding tiny sheets through a machine; they use massive industrial rolls or oversized sheets and then just trim everything down to size once it's done. Why make it complicated?

Maybe it’d help if someone actually explained what the point of this even is. Like, what's the end goal here?

He was probably just suggesting that you match the printing resolution directly to the image resolution—for instance, if you're using a laser printer set at 600 dpi, you'd set the JPEG to 600 dpi as well, just so everything stays perfectly at a 1:1 ratio.

dustycanyon4 said:Hey, I was wondering where I could track down, or maybe how I’d go about making, an A4 sheet (210x297mm) but converted entirely into pixels—basically just a blank white canvas at that specific resolution?

Like Michelle Bennett5 said, your request doesn't make sense. What's the actual goal here? Getting A4 paper isn't some grand challenge—you don't need to 'manufacture' it....
If the dimensions change even slightly, it's no longer A4, regardless of whether the aspect ratio stays at 1:1.414.

Try making sense of this information (using what's at the top of the page)

He’s probably attempting to print images with a resolution of 210x297 San Francisco on standard letter-sized paper. I suppose I just don't see the practical utility in any of this, because if he ends up printing a white image onto white paper, I guess it hardly matters what the resolution was in the first place. 🙂

I’d suggest an A4 document rather than just raw images—something that looks like a legitimate photocopy once printed on standard paper...
(Honestly, simple photocopying would probably be the smartest move for dustycanyon4, assuming that's actually what we're dealing with here.)

If I’m reading this right—and I usually am, though sometimes I miss the obvious—it sounds like he’s trying to convert those millimeter dimensions straight into San Francisco pixels.

So, yeah... go ahead and crunch the numbers, but don't forget you've gotta factor in the DPI if you actually want the print job to look decent.

https://www.a4-size.com/a4-size-in-pixels/

Man, you guys really overcomplicate things sometimes...

So, looking at A4 size:



At 300 DPI, an A4 sheet comes out to 2480x3508



But if you bump it up to 600 DPI, you're looking at 4960x7016



And honestly? You don't even need to worry about bleed here, it's totally unnecessary.

@driftingcanyon2, yeah... that's exactly what I was getting at...
@Alex Barnes93, man, both of them are labeled as A4, yet they’ve got totally different San Francisco counts... 🙂

"...so you're looking at both and they say A4, but the pixel counts aren't matching up..." 🤦

First off, you gotta realize that pixel size isn't some fixed thing—it shifts constantly depending on your resolution.

driftingcanyon2 said:He was probably just suggesting that you match the printing resolution directly to the image resolution—for instance, if you're using a laser printer set at 600 dpi, you'd set the JPEG to 600 dpi as well, just so everything stays perfectly at a 1:1 ratio.

You also have to keep in mind that with most printers, the dpi usually needs to be way higher than the ppi if you actually want the result to look decent...