Paper Size Reference
Look up paper sizes in mm, inches, points and pixels.
How to use
- 1 Choose a paper size from the dropdown.
- 2 Pick portrait or landscape orientation.
- 3 Set the DPI you care about for the pixel dimensions.
- 4 Read the size in mm, inches, points and pixels, then copy the summary.
About Paper Size Reference
The Paper Size Reference gives you the exact dimensions of every common paper format in the units you actually need.
Pick a size — ISO A0 through A7, the B and C series, envelope sizes like C5 and DL, or US formats such as Letter, Legal, Tabloid and the ANSI sheets — and instantly see its width and height in millimetres, inches, PostScript points and pixels.
The pixel figures are computed for whatever print resolution you enter, so you can find that an A4 page is 2480 × 3508 px at 300 DPI for print, or 794 × 1123 px at the 96 DPI CSS reference.
That makes the tool handy whether you are setting up an InDesign document, sizing a canvas in a web app, exporting a PDF, or just sanity-checking a layout.
A landscape toggle swaps the width and height for you, and the aspect ratio is shown so you can see the elegant 1:√2 relationship that lets each ISO size fold neatly into the next.
Because the ISO series is defined mathematically and the US sizes are fixed, the conversions are exact rather than guessed.
Everything is calculated locally in your browser with no uploads, and a one-click copy gives you a tidy summary line to paste into specs, tickets or emails.
It works offline once loaded, making it a fast, dependable reference for designers, developers and anyone preparing documents for print.
FAQ
How many pixels is A4?
At 96 DPI an A4 page is 794 × 1123 px; at 300 DPI it is 2480 × 3508 px. Enter any DPI and the tool recalculates the pixel dimensions for you.
Why is each A size exactly half the previous one?
The ISO A series uses a 1:√2 aspect ratio, so folding a sheet in half along its long edge produces the next size down with the same proportions and no wasted paper.
Are US Letter and ANSI A the same size?
Yes. US Letter (8.5 × 11 in) and ANSI A describe the same sheet; both are listed so you can find whichever name you searched for.