How to Add Roman Numerals to a PDF (i, ii, iii)

Open almost any printed book and you'll see two numbering systems. The preface, foreword, and table of contents are numbered i, ii, iii, iv — and then the first chapter starts again at 1. It's a centuries-old convention, and it exists for a practical reason: the front matter is often written last, so numbering it separately means adding a page to the preface doesn't renumber the entire book.

Theses, reports, and formal documents are frequently required to follow it. This guide covers adding Roman numerals to a PDF, and how to combine them with Arabic numbers in the same document.

Lowercase or uppercase?

Both are available, and the convention is clear:

• Lowercase (i, ii, iii) — the standard for front matter: preface, foreword, acknowledgements, table of contents. This is what you want the vast majority of the time.
• Uppercase (I, II, III) — used for section or volume numbering, and occasionally on title pages. Rarely used for running page numbers.

If in doubt, or if a style guide simply says "Roman numerals for the front matter," use lowercase.

The simple case: Roman numerals throughout

If the whole document should be in Roman numerals:

1. Open Blackpdf's Add Page Numbers tool and drop your PDF in.
2. Set Number Format to i, ii, iii (lowercase) or I, II, III (uppercase).
3. Set your Position and styling.
4. Click Generate PDF and download.

The book layout: Roman front matter, then Arabic body

This is what most people actually want, and it takes two passes — one for each numbering system. Say your document has 6 pages of front matter (pages 1–6) and the body starts on page 7.

Pass 1 — number the front matter in Roman numerals:

1. Open the tool with your original PDF.
2. Number Format: i, ii, iii.
3. Start from Page: 1 (or 2, if page 1 is a cover you want left clean).
4. Start Numbering at: 1 — so the first stamped page reads "i".
5. Generate and download. Call this file front.pdf.

Pass 2 — number the body in Arabic:

1. Open the tool again, this time with the file you just made.
2. Number Format: 1, 2, 3.
3. Start from Page: 7 — the first page of the body.
4. Start Numbering at: 1 — so the body restarts at "1".
5. Generate and download.

The result: front matter numbered i–vi, body starting again at 1. Exactly the book convention.

The critical detail is Start Numbering at. Without it, your body would begin at "7" (its physical position) instead of restarting at "1". That single field is what makes the two-system layout work — the same mechanic explained in our cover page guide.

Common questions

Why does it take two passes?

Because a single pass applies one format to one continuous run of pages. Roman front matter and Arabic body are two different formats with two different starting counts, so each needs its own pass. Run the second pass on the output of the first, and the stamps accumulate.

Can I stamp Roman numerals on only some pages?

Yes — that's what Start from Page is for. It begins stamping at the page you name. Combined with a second pass for the later pages, you can give any stretch of the document its own numbering system.

My body pages are numbered 7, 8, 9 instead of 1, 2, 3.

You set Start from Page but not Start Numbering at. The first tells the tool where to start stamping; the second tells it what number to print. Set Start Numbering at to 1 on the second pass.

Should I use lowercase or uppercase?

Lowercase (i, ii, iii) for front matter — that's the standard. Uppercase (I, II, III) is for sections and volumes, not running page numbers.

Can I remove the numbers if I make a mistake?

Not from inside the finished PDF — the numbers are stamped into the page content. Keep your original un-numbered file so you can start over cleanly.

Wrap-up

• Whole document in Roman numerals? One pass — set the format to i, ii, iii and go.
• Book layout (Roman front matter, Arabic body)? Two passes. Number the front matter first, then run the result through again for the body with Start from Page = the body's first page and Start Numbering at = 1.

The field that makes it all work is Start Numbering at — it lets the printed number differ from the page's physical position. For everything about position, fonts, and styling, see the main page numbers guide.