A-series reference
A1 paper size (594 × 841 mm → 23.39 × 33.11 in)
A1 has nominal trimmed dimensions of 594 × 841 mm, approximately 23.39 × 33.11 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.
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.
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.
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.
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
A1 is 594 × 841 millimeters, approximately 23.39 × 33.11 inches. It uses the ISO A-series 1:sqrt(2) aspect ratio and is half the area of A0.
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.
Yes. Because of the 1:sqrt(2) ratio, scaling A0 to 70.7 percent fits perfectly on A1 without changing proportions.
Sources and calculation notes
A1 has nominal trimmed dimensions of 594 × 841 mm, approximately 23.39 × 33.11 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.