What is A1 in inches?

A1 is 594 × 841 millimeters, which equals 23.39 × 33.11 inches. It uses the ISO A-series 1:sqrt(2) aspect ratio and is half the area of A0.

How should I prepare A1 posters for print?

Add 3–5 mm bleed and keep key text at least 6–8 mm from the trim. Export at 300 dpi or as vector PDF to keep edges and linework crisp.

Can I scale A0 content down to A1?

Yes. Because of the 1:sqrt(2) ratio, scaling A0 to 70.7 percent fits perfectly on A1 without changing proportions.

A-series reference

A1 paper size (594 × 841 mm → 23.39 × 33.11 in)

A1 is a large-format favorite for event posters, conference boards, and scaled-down CAD drawings. Use the inch conversions and print tips below to keep proportions, bleed, and clarity intact.

594 × 841 mm23.39 × 33.11 inHalf A0

Dimensions

Millimeters: 594 mm × 841 mm
Inches: 23.39 in × 33.11 in
Area: about 0.5 m² (775.6 in²), half of A0
Ratio: 1:sqrt(2), scales perfectly with all A sizes

Print setup tips

Add 3–5 mm bleed and export to PDF or 300 dpi images. If reducing from A0, scale to 70.7 percent to keep layout and line weights consistent.

Open mm to inches converter See paper sizes

Common uses

Event posters

Conference, concert, and campus posters that need visibility without full A0 size.

Display boards

Science fair or presentation boards; allow extra margin for clips, tape, or frames.

Scaled CAD plots

Half-size reductions of A0 drawings with consistent proportions and line weights.