Paper Sizes

Paper Size Converter

Need to convert paper sizes quickly and accurately? Our free Paper Size Converter gives instant results for A-series and US paper sizes — perfect for printing, artwork, posters, design files and digital downloads.

Whether you are converting:

• A0 to inches
• A1 to cm
• A2 to pixels
• A4 print sizes
• US Letter to A4
• poster dimensions
• print-ready artwork sizes

…our calculator makes it simple.

What Are A Paper Sizes?

A paper sizes are international standard paper dimensions commonly used across:

• printing
• posters
• technical drawings
• office documents
• digital artwork
• professional design files

What Is US Letter?

US Letter is a paper size commonly used in the United States. It is different from A4, which is commonly used in the UK, Europe and many other countries.

• US Letter is 8.5 × 11 inches
• A4 is 210 × 297mm
• US Letter is wider and shorter than A4
• This matters for printing and document layout
• Pixel size depends on DPI

Paper Size Formula

To convert millimetres to inches:

Inches=Millimetres÷25.4

To convert inches to pixels:

Pixels=Inches×DPI

Example:

A4 at 300 DPI = 2480 × 3508 pixels

Common Paper Size Conversions

Paper Size Dimensions
A0 841 × 1189mm
A1 594 × 841mm
A2 420 × 594mm
A3 297 × 420mm
A4 210 × 297mm
A5 148 × 210mm
US Letter 8.5 × 11 inches
US Legal 8.5 × 14 inches

Why Use Our Paper Size Calculator?

• Instant live conversion
• Supports A0, A1, A2, A3, A4 and A5
• Supports US Letter, US Legal and US Tabloid
• Converts to mm, cm, inches and pixels
• Includes DPI pixel calculations
• Mobile friendly
• Popular Paper Size Searches

People often search for:

• A0 to inches
• A1 to cm
• A2 to pixels
• A4 size in pixels
• US Letter to A4
• paper size converter
• print size calculator

Our converter is designed to answer these instantly.

Print & Design Uses

Paper size conversions are commonly used for:

• poster printing
• digital downloads
• Etsy artwork files
• print-ready artwork
• framed wall art
• technical drawings
• office documents
• Artwork & Pixel Uses

This converter is also useful for:

• choosing canvas sizes
• checking DPI requirements
• resizing artwork
• comparing US and A-series paper
• creating print files
• designing posters and flyers

Use WhatsThisIn.com to convert paper sizes instantly with precision.