Paper size calculator: every common size in mm, inches, points and pixels

A, B and C sizes, US paper sizes, envelopes and cards, with the pixel size at the resolution you choose. Handy when a form asks for an image of exactly one page.

Play · 2 min read · Updated 22 October 2026

Choose a resolution to see the pixel size of each format. PDF points are always at 72 per inch.

Need to change a PDF's page size? Use Change page size. Want to know why the A sizes fit together so well? Read A4 vs Letter.

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