# 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.

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](https://pdfjade.com/resize-pdf-pages). Want to know why the A sizes fit together so well? Read [A4 vs Letter](https://pdfjade.com/guides/a4-vs-letter-paper-sizes).

Source: https://pdfjade.com/guides/paper-size-calculator