Paper Size Converter

About Paper size converter

Looks up a paper size from a list of ISO A, B and C sizes, North American sheets and common photo prints, then shows its dimensions in millimeters, centimeters, inches, points and pixels. It is aimed at designers, printers and anyone preparing a document or image for a specific sheet.

How to use it

1. Pick a paper from the Size menu. It opens on A4 and offers ISO, North American and photo groups.
2. Optionally choose a second sheet in Compare with (optional) to see the two side by side.
3. Set the DPI with one of the presets (72, 96, 150, 300, 600) or type your own number.
4. Read each table for width and height, and study the To-scale comparison drawing.

A4 prepared for 300 DPI printing

A4 at 300 DPI

210 × 297 mm, 8.2677 × 11.6929 in, 595.28 × 841.89 pt, 2480 × 3508 px

When to use it

• Choosing the pixel dimensions for a poster or flyer that will be printed at 300 DPI.
• Setting up a PDF page in points when a library asks for them.
• Comparing US Letter with A4 before sending a document overseas.
• Finding the right canvas for a 5 × 7 inch photo print.

Questions about Paper size converter

What makes ISO paper sizes special?

Every A, B and C size has a width to height ratio of about 1 to 1.414. Cutting a sheet in half across its long side gives the next size down with identical proportions.

Why does A4 show a ratio of 70:99?

The ISO sizes are whole millimeters, and 210 by 297 reduces to 70:99. The decimal beside it, 1.4143, is close to the ideal 1.4142.

How are pixels calculated?

Inches multiplied by DPI, rounded to whole pixels. A DPI that is zero, negative or not a number is flagged, and the tool uses 300 in the meantime.

Are Tabloid and Ledger different papers?

They are the same sheet turned around: Tabloid is 11 by 17 inches in portrait, and Ledger is 17 by 11 in landscape.

Can I enter my own dimensions?

No. Sizes come from the built-in list only, and all sheets are shown in portrait orientation.

Related tools

• Base64 encoderEncode any string input to Base64.
• Base64 decoderDecode Base64 input to back to string.
• Base64 to ImageDecode Base64 input to an image.
• Image to Base64Transform an image input to a Base64 string.
• URL encoderEncode any string input to URL format.
• URL decoderDecode URL input to back to a normal string.