Side-by-Side Comparison
A-Series (ISO 216)
A0 vs. A1
Comparing 2 standards across 7 specifications. 7 key differences identified.
Comparing:
A0
A1
A0 is the base unit of the ISO 216 international paper standard, defined with an exact surface area of 1 square meter (1.000 m²) and dimensions of 841 × 1189 mm (33.1 × 46.8 inches). Operating on the 1:√2 Lichtenberg aspect ratio, it is the global standard for large architectural CAD plots, engineering schematics, and academic conference poster presentations.
A1 is an ISO 216 standard paper size measuring 594 × 841 mm (23.4 × 33.1 inches), with an exact surface area of 0.500 square meters (half of A0). It is the premier standard format for architectural blueprints, structural engineering drawings, municipal planning maps, and large-format flipcharts.
Specification Comparison Table
7 Parameters| Parameter / Spec | ||
|---|---|---|
|
Width × Height (Metric)
|
841 × 1189 mm | 594 × 841 mm |
|
Width × Height (Imperial)
|
33.1 × 46.8 in | 23.4 × 33.1 in |
|
Nominal Surface Area
|
1.000 m² (1,000,000 mm²) | 0.500 m² (500,000 mm²) |
|
Exact Aspect Ratio
|
1 : √2 (1 : 1.4142 — Lichtenberg ratio) | 1 : √2 (1 : 1.4142) |
|
Weight of Standard 80 gsm Sheet
|
80.0 grams exactly | 40.0 grams |
|
Halving Relationship
|
Cut in half across length yields 2 sheets of A1 | Cut in half yields 2 sheets of A2 |
|
Primary Applications
|
Architectural blueprints, GIS cartography, technical CAD schematics, academic research posters | Architectural blueprints, conference presentation boards, large flipcharts, theatrical event posters |