Why the PDF says page 3 when the page says 1

The short answer: three numbers that mean different things

You open a PDF. The reader says 3 / 12 in its toolbar. The page itself says 1 at the bottom. Neither is wrong. They are two different numbers, and there is a third kind too:

Most of the time the first two differ because of a cover, a contents page or a few pages taken from a longer document. The rest of this post shows each number, why they disagree, and which one to quote when you tell someone where to look.

Number 1: the page's place in the file

Every PDF reader counts its pages from the first one: 1, 2, 3, and so on to the last. This is the number you see in the page box or toolbar, like "3 / 12" or "7 / 120". In our PDF viewer, the page box shows the page you are on and how many there are, and you can type another number to jump there.

This count is about the file, not the paper. It isn't printed on the page, and it can't be wrong in the sense of a mistake: it is simply the place of the page in the list. Several things use it:

• Jumping to a page in a reader.
• Choosing pages in tools. Page ranges in Split PDF count from the file's first page, not from the numbers printed on the pages. Its guide says so in its list of fixes: if the wrong pages came out, check the labels under the cards.
• Print ranges in many programs. Look at what your reader shows before you type "pages 3 to 14" in the print window.

The place changes whenever pages are added, deleted, moved or merged. Delete the cover and everything moves up by one.

Number 2: the number printed on the page

This is the number a reader sees on the page itself, at the bottom or the top. It is part of what is on the page, like a word. It comes from:

• The word processor. A thesis typed in a word processor often has page numbers in its footer, which go into the PDF with the page.
• A scan, where the number is printed on the paper and is now part of the picture.
• A tool that adds numbers to a finished PDF. Add Page Numbers writes the number on the page, where it shows on screen, on paper and in a screenshot. You choose the place, the style and the first number.

This number is the one that helps people say "look at page 14". It only changes if someone edits the page. A page taken out of a long document keeps the number it was printed with: if you pull pages 40 to 55 out of a book, the new PDF has 16 pages, and the reader counts 1 to 16, but the pages still say 40 to 55.

Number 3: page labels, the hidden one

A PDF can also carry page labels: custom page numbers stored in the file, such as i, ii and iii for the introduction and 1, 2, 3 for the main part. The reader can show the label in its toolbar instead of the plain count, so the toolbar says "ii" or "1" where the place would say "3". Labels aren't printed on the page. They are a note in the file for the reader's toolbar.

Where do labels come from? A program that makes the PDF writes them, usually for books and long reports with front matter. Many PDFs have none.

Our tools treat labels in different ways, because they build the new file differently:

Printed numbers are never dropped by these tools, because they are part of the page. That makes the printed number the safest one to rely on after you've moved pages around.

Why they disagree: five common situations

None of these is a fault. They are the normal result of putting pages together or taking them apart. The confusion comes when two people use different numbers for the same page.

Which number to use when you tell someone where to look

When you say "see page 14", you and the other person must mean the same page. A few habits stop the mix-up:

• For a document you share, number the pages on the page, and quote that number. Everyone sees the same thing on screen and on paper.
• Add the total if a missing page would matter, as in Page 14 of 40. Agreements, applications and bundles for a lawyer or a court office work well this way. If a page goes missing, the numbers show it.
• Say which you mean if the two differ: "page 14 as printed, which is page 16 in the reader".
• Make them agree, if you can. If you skip a cover, set First number to 2 in Add Page Numbers, so the second page says 2 and the reader says 2. Then there is only one number to talk about. The post Add page numbers to PDF starting from page 2 or 3 shows both ways.
• Number after you've finished arranging. If you merge, delete or move pages after numbering, the printed numbers go out of order. Do the arranging first, with Merge PDF and Organize PDF, and number the finished file.

For an application or a bundle, tell the receiver what the numbers mean in one line, such as "Pages are numbered Page 1 of 24, including the cover."

Check what your own PDF has

You can tell in a minute which numbers a file has:

1. Open it in the PDF viewer or your usual reader and go to the second page. Does the toolbar number match what is on the page?
2. Look for numbers on the page. If there are none, the file has no printed numbers, and the toolbar is all you have.
3. If the toolbar shows something like i or ii where the count would be 3, the file has page labels. Not all readers show them.
4. If numbers are missing and you want them, Add Page Numbers shows each card with the number in place before you save.

If the printed numbers in a scan are crooked or faint, nothing in the file can fix them. The scan is a picture, and the numbers on it are part of the picture.

Common mix-ups, cleared up

"The PDF has the wrong page count."

The count is the number of pages in the file. A document that is "12 pages" in a word processor can have a different count if a cover or an appendix is a separate file.

"Add Page Numbers changed the reader's number."

It doesn't. It prints a number on the page and leaves the reader's count and the labels as they were. If you skip a cover, the toolbar still calls the second page "2" while the page says 1.

"The form says my file has 14 pages but the page numbers end at 12."

The number of pages in the file is the reader's count, such as the 14 in "3 / 14". Printed numbers and page labels can stop earlier, for example when a cover or an appendix has none. They don't change the count.

"I split a book and the pages say 40, 41, 42."

That is right. Printed numbers stay with the pages. The reader counts from 1 in the new file.

"My merged file lost its i, ii, iii."

Merge PDF leaves page labels out, so the pages are numbered 1, 2, 3 from the start. If the numbers were printed on the page, they stay.

Numbering a file shouldn't mean uploading it

The files people number are often private: legal papers, applications with ID copies, medical reports. Add Page Numbers has no upload step and never sends your PDF anywhere: your own browser adds the numbers. The page contacts only this site and Google's ad service, which shows the ads that keep the tools free, and our code never gives your files to the ad code. The privacy policy has the details.