Paper Size Converter
Paper Size Converter
Choose a standard paper size and your desired output unit. This converts the paper's official dimensions to millimeters, centimeters, inches, or pixels (at a DPI you specify) so you can set up your design document correctly.
The ISO A-series (A0 down through A5, used throughout most of the world outside North America) is built on an elegant halving rule: each size is exactly half the area of the one above it, which is why folding an A4 sheet in half gives you an A5 sheet. North America uses a separate, unrelated set of standard sizes instead — US Letter (8.5×11in), US Legal (8.5×14in), and Tabloid (11×17in) — which is a common source of confusion when a document designed for one system gets printed on the other. Pixel conversion depends on the DPI you specify, since pixels aren't a fixed physical size on their own.
- ISO A-series sizes: A0 (841×1189mm) through A5 (148×210mm) each half the area of the size above it, used throughout most of the world outside North America.
- US sizes: US Letter (8.5×11in), US Legal (8.5×14in), and Tabloid (11×17in) are the standard North American paper sizes.
- Pixel conversion depends on DPI: pixel dimensions aren't fixed — they scale with your chosen DPI (e.g. A4 at 300 DPI vs. 150 DPI gives very different pixel counts for the same physical size).
What DPI should I use to convert to pixels for print?
300 DPI is the standard for print-quality documents; use 72 or 96 DPI only if you specifically need screen-resolution pixel dimensions.
What's the difference between A4 and US Letter?
A4 (210×297mm / 8.27×11.69in) is slightly narrower and longer than US Letter (8.5×11in / 215.9×279.4mm) — they're close but not interchangeable for exact-fit printing.
Paper Size Converter
Choose a standard paper size and your desired output unit. This converts the paper's official dimensions to millimeters, centimeters, inches, or pixels (at a DPI you specify) so you can set up your design document correctly.
The ISO A-series (A0 down through A5, used throughout most of the world outside North America) is built on an elegant halving rule: each size is exactly half the area of the one above it, which is why folding an A4 sheet in half gives you an A5 sheet. North America uses a separate, unrelated set of standard sizes instead — US Letter (8.5×11in), US Legal (8.5×14in), and Tabloid (11×17in) — which is a common source of confusion when a document designed for one system gets printed on the other. Pixel conversion depends on the DPI you specify, since pixels aren't a fixed physical size on their own.
- ISO A-series sizes: A0 (841×1189mm) through A5 (148×210mm) each half the area of the size above it, used throughout most of the world outside North America.
- US sizes: US Letter (8.5×11in), US Legal (8.5×14in), and Tabloid (11×17in) are the standard North American paper sizes.
- Pixel conversion depends on DPI: pixel dimensions aren't fixed — they scale with your chosen DPI (e.g. A4 at 300 DPI vs. 150 DPI gives very different pixel counts for the same physical size).
What DPI should I use to convert to pixels for print?
300 DPI is the standard for print-quality documents; use 72 or 96 DPI only if you specifically need screen-resolution pixel dimensions.
What's the difference between A4 and US Letter?
A4 (210×297mm / 8.27×11.69in) is slightly narrower and longer than US Letter (8.5×11in / 215.9×279.4mm) — they're close but not interchangeable for exact-fit printing.