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Size calculators and reference pages for paper, print, DPI, screens, and social images. Copy the result and keep working.

A4 size Print size calculator

Copyable resultsSource and method shownNo login

A4 at 300 DPI 2480 x 3508

Paper to pixels
mm, cm, inch, px

Common outputs

A4210 x 297 mm

Letter8.5 x 11 in

OG image1200 x 630

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Common answers, copyable.

Direct values for the most-checked sizes. Each card opens a full reference page or calculator.

ISO A A4 210 x 297 mm 2480 x 3508 px at 300 DPI Open North America US Letter 215.9 x 279.4 mm 2550 x 3300 px at 300 DPI Browse ISO A A3 297 x 420 mm 3508 x 4961 px at 300 DPI Browse ISO A A5 148 x 210 mm 1748 x 2480 px at 300 DPI Browse Pixels A4 in pixels 2480 x 3508 px at 300 DPI; 1240 x 1754 at 150 DPI Open Tool Print size calculator px - DPI - inch pixels to print size and back Calculate Tool Print DPI calculator DPI from pixels not for mouse / gaming DPI Calculate Tool Aspect ratio 16:9, 9:16, 1:1, 4:3 simplify and scale dimensions Calculate

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Four entry points cover every size question. Open the one that matches what you are about to do.

PAPER Paper sizes for print and design Find A4, Letter, photo, poster, and business card sizes in mm, inches, and pixels. PRINT Print size and DPI calculators Convert pixels, DPI, inches, cm, and print size without guessing. SCREEN Screen and wallpaper sizes Find screen, wallpaper, screenshot, and device canvas sizes. SOCIAL Social and web image sizes Find image sizes for Instagram, YouTube, Open Graph, TikTok, X, WeChat, and Xiaohongshu.

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Direct answers, no setup.

Each card shows the result first. Open the page for source, method, and copyable variants.

A4 size

210 x 297 mm, 8.27 x 11.69 in, 2480 x 3508 px at 300 DPI.

Print size calculator

Convert pixels and DPI to print size in inches, cm, and mm — or back.

A4 size in pixels

2480 x 3508 px at 300 DPI; 1240 x 1754 px at 150 DPI.

ALL

All paper sizes

A, B, C series, US Letter / Legal, photo, envelope, business card.

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Popular paper sizes.

Use this when the user is comparing known office and print formats.

Size	Series	Millimeters	Inches	300 DPI pixels
A4	ISO A	210 x 297 mm	8.27 x 11.69 in	2480 x 3508 px
A3	ISO A	297 x 420 mm	11.69 x 16.54 in	3508 x 4961 px
A5	ISO A	148 x 210 mm	5.83 x 8.27 in	1748 x 2480 px
US Letter	North America	215.9 x 279.4 mm	8.5 x 11 in	2550 x 3300 px
US Legal	North America	215.9 x 355.6 mm	8.5 x 14 in	2550 x 4200 px
Tabloid	North America	279.4 x 431.8 mm	11 x 17 in	3300 x 5100 px

See all paper sizes →

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Questions SizeKit answers.

Short answers first, then calculators for exact values.

What is A4 size at 300 DPI?

A4 at 300 DPI is 2480 x 3508 px when rounded from 210 x 297 mm. At 150 DPI, A4 is 1240 x 1754 px.

Do pixels have a physical size?

Pixels only become a physical size when you choose DPI or PPI. The print size of an image is calculated by dividing its pixel dimensions by DPI.

How do I convert pixels to print size?

Open the Print Size Calculator. Enter width and height in pixels and the DPI; the tool returns inches, cm, and mm. Formula: inches = pixels / DPI.

What aspect ratio is 1920 x 1080?

1920 x 1080 simplifies to 16:9. Open the Aspect Ratio Calculator to simplify any width and height, or scale 16:9 to a new size.

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Need a custom number?

Use the bottom calculator after you already know the task. It should not be the first thing a user has to understand.