A-series reference
A0 paper size (841 × 1189 mm → 33.11 × 46.81 in)
A0 has nominal trimmed dimensions of 841 × 1189 mm, approximately 33.11 × 46.81 inches.
Maintained by mmtoinches.im · Updated
NIST describes the standard inch as exactly equivalent to 25.4 mm
. NIST length definition. ISO 216 — A and B series paper sizes. Method and limitations.
A0 is the base of the ISO A-series, used for large posters, CAD plots, and architectural drawings. Below are rounded inch conversions, aspect ratio notes, and print-ready guidance for bleed, mounting, and transport.
Dimensions
- Millimeters: 841 mm × 1189 mm
- Inches: 33.11 in × 46.81 in
- Area: about 0.9999 m² (1551.2 in²)
- Ratio: 1:sqrt(2), doubles or halves cleanly across A sizes
Print setup tips
For plotters or large-format printers, add 3–5 mm bleed and export at 300 dpi or vector/PDF to keep linework crisp. Center-align the artwork to reduce edge risk during trimming or mounting.
Common uses
Exhibition posters
Large visuals for events, trade shows, and storefront backdrops that need maximum area.
CAD and architectural plots
Full-size plan sets for review; keep line weights consistent and export as PDF to avoid scaling errors.
Mounted boards
Foam board or rigid mounts for presentations; leave margin for tape, clips, or frames.
Print-resolution, bleed and margin examples are starting points, not ISO paper-size requirements. Follow the printer or publisher’s specifications; vector PDF content does not have a single image DPI.
Frequently Asked Questions
A0 is 841 × 1189 millimeters, approximately 33.11 × 46.81 inches. It follows the 1:sqrt(2) aspect ratio of the ISO A-series and is the largest standard A size.
Add at least 3–5 mm bleed on all edges and keep important text 8–10 mm inside a safe zone. Large prints are more prone to trimming variation, so extra safety margin helps.
Use a rigid tube or foam board backing, and avoid tight rolls that crease the edges. If you plan to mount, leave margin for tape or spray adhesive and avoid placing critical logos near the border.
Sources and calculation notes
A0 has nominal trimmed dimensions of 841 × 1189 mm, approximately 33.11 × 46.81 inches.
Method: Divide millimeters by 25.4 to obtain inches. The factor is exact; displayed decimal values are rounded. Fractional inches are rounded to the selected denominator.
Scope: The mm dimensions are nominal ISO trimmed sizes; inch values are rounded. Add bleed or printer margins separately.
Content maintained by mmtoinches.im. Updated and reference notes reviewed . How we calculate and present measurements. Sources support the stated definitions; examples and calculators are not certification of a product or compliance with a standard.