Page & Layout

PDF Page Dimension Converter

Convert between mm, cm, inches, points, and pixels with common print-size presets.

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What It Checks

This tool converts measurements between the units commonly used in print production: millimetres, centimetres, inches, points, and pixels. It supports DPI-aware pixel conversions so you can translate between screen and print dimensions accurately.

How To Use

Enter a numeric value in the input field.
Select the source unit and the target unit from the dropdowns.
Read the converted result instantly on screen.

Why It Matters

Print specifications arrive in different units depending on the designer, the RIP software, or the regional convention. A single conversion mistake can result in documents being printed at the wrong physical size, so having a reliable converter saves time and avoids costly errors.

Frequently Asked Questions

What is a point in printing?

A typographic point is 1/72 of an inch. It is the standard unit for font sizes, leading, and many PDF internal measurements. Points provide a consistent reference regardless of screen resolution.

Why does DPI matter for pixels?

Pixels have no inherent physical size. DPI (dots per inch) defines how many pixels fit into one inch of printed material. A 300-pixel-wide image at 300 DPI prints at one inch, but at 72 DPI it would print at over four inches.

What are common print sizes?

A4 is 210 × 297 mm (595 × 842 pt), US Letter is 8.5 × 11 in (612 × 792 pt), and A3 is 297 × 420 mm. These are the most frequently requested sizes in commercial printing.

How do I convert pixels to physical dimensions?

Divide the pixel count by the DPI. For example, 2400 pixels at 300 DPI equals 8 inches. This tool handles that calculation for you when you select pixels as the source unit and enter the DPI.

What is the difference between DPI and PPI?

DPI refers to printed dots per inch and is used in print workflows. PPI (pixels per inch) refers to screen display density. For print work, DPI is the relevant measurement when converting pixel dimensions to physical sizes.

Before printing, you may also want to check:

PDF Page Size Checker

Check page dimensions, detect standard sizes like A4 and Letter, and identify mixed page sizes in your PDF.

PDF Page Counter

Instantly count the pages in your PDF and see page orientation breakdown.

PDF Bleed Checker

Verify whether your PDF includes the correct bleed area for professional printing.

PDF Margin Checker

Check whether content in your PDF maintains safe margins from the page and trim edges.