A0 Paper Size

A0 is the largest standard size in the ISO 216 A series, measuring 841 × 1189 mm (33.11 × 46.81 inches). With a surface area of exactly 1 square meter, A0 serves as the base size from which all other A sizes are derived by successive halving.

What Size is A0 in Inches?

A0 is 33.11 × 46.81 inches (841 × 1189 mm). It has a surface area of exactly one square meter, making it the largest standard A series size.

A0 in Pixels

Pixel dimensions depend on your target DPI (dots per inch). Higher DPI means more pixels and sharper print output. 300 DPI is the standard for commercial printing.

Use our free Inches to Pixels converter or Millimeters to Pixels converter to calculate pixel dimensions at any DPI.

A0 with Bleed

When preparing files for commercial printing, add bleed — extra design area beyond the trim edge that gets cut off during finishing. The standard bleed for ISO sizes is 3 mm per side.

Size Comparison

A0 has a surface area of exactly 1 m², making it the starting point of the A series. Folding an A0 sheet in half produces two A1 sheets. A0 is roughly four times the size of A2 and sixteen times the size of A4.

Common Uses

• Technical and architectural drawings
• Scientific and academic conference posters
• Large-format event posters and exhibition displays
• Detailed maps and engineering schematics

Design Tips

• At 300 DPI, A0 produces a 9933 × 14043 pixel file — expect large file sizes. For non-photographic content such as charts or text-heavy posters, 150 DPI is often sufficient.
• Most home and office printers cannot handle A0. You will need a large-format plotter or a professional print service.
• Standard bleed adds 6 mm total to each dimension. Confirm bleed requirements with your printer before finalizing.
• Use vector graphics where possible to keep file sizes manageable and output sharp at any viewing distance.