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Quickly check ISO 216 standard A-series paper sizes from A0 to A13. View accurate dimensions in both millimeters and inches with aspect ratio references.
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
This reference table lists 14 A-series sizes, from A0 to A13, with each size written as short edge × long edge in millimeters and approximate inches. For example, A0 is 841 × 1189 mm, or about 33.1 × 46.8 in; A4 is 210 × 297 mm, or about 8.3 × 11.7 in. Search or sort the table to find the row you need. Inch values are rounded for display, so use millimeters when a precise nominal dimension matters.
ISO 216 specifies trimmed A and B series dimensions for writing paper and some printed matter. A-series sizes are a separate paper system from US Letter; confirm which format a printer, form, or recipient requires. ISO 216:2007 is the standard reference for the A-series framework.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Search for a code such as A0, A4, or A13, or scan the size column. The table keeps the short edge first and long edge second.
Read millimeters for the nominal metric dimensions or inches for a convenient approximate equivalent. The displayed inch values are rounded to one decimal place.
For a landscape layout, swap the two edge values. A4 landscape is therefore about 11.7 × 8.3 in; its size code remains A4.
Adjacent A numbers make it easy to compare the series. Each step down is designed to halve the preceding sheet’s area while preserving the series’ proportions, subject to whole-millimeter dimensions.
Use cases
See how the tool fits into real work and everyday tasks.
When a print request specifies A3 or A4, confirm the nominal dimensions before setting a page or canvas. For a US office printer, also check that the requested paper is supported.
Use the rows to compare A4 with A3 or A5 when estimating how a design will scale. Confirm margins, bleed, and printer capability separately with the production requirements.
When handing off a file, include the A-size code, orientation, and unit. This reduces ambiguity when collaborators work with different regional paper conventions.
Q&A
Find concise answers to common questions and confusing cases.
The lookup shows A0 as 33.1 × 46.8 in, approximately. Its nominal dimensions are 841 × 1189 mm; use those metric values when precision is needed.
No. A4 is 210 × 297 mm (about 8.3 × 11.7 in); US Letter is 8.5 × 11 in. They are close in size but not interchangeable in every layout or printer setting.
No. This page is an A-series lookup from A0 to A13. It does not provide Letter or other US paper formats.
Notes
Review scope, result limitations, and important precautions before use.
The inch column is rounded to one decimal place for quick reference. It is not a print tolerance, trim instruction, or guarantee that a device can feed the sheet.
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