Side-by-Side Comparison
A-Series (ISO 216)
A1 vs. A3
Comparing 2 standards across 7 specifications. 6 key differences identified.
Comparing:
A1
A3
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.
A3 is an ISO 216 standard paper size measuring 297 × 420 mm (11.7 × 16.5 inches), with a surface area of 0.125 square meters (one eighth of A0). It is the standard large-format paper supported by commercial office multifunction printers (MFPs), widely used for financial spreadsheets, two-page A4 magazine spreads, and engineering diagrams.
Specification Comparison Table
7 Parameters| Parameter / Spec | ||
|---|---|---|
|
Width × Height (Metric)
|
594 × 841 mm | 297 × 420 mm |
|
Width × Height (Imperial)
|
23.4 × 33.1 in | 11.7 × 16.5 in |
|
Nominal Surface Area
|
0.500 m² (500,000 mm²) | 0.125 m² (125,000 mm²) |
|
Exact Aspect Ratio
|
1 : √2 (1 : 1.4142) | 1 : √2 (1 : 1.4142) |
|
Weight of Standard 80 gsm Sheet
|
40.0 grams | 10.0 grams |
|
Halving Relationship
|
Cut in half yields 2 sheets of A2 | Cut or folded in half yields 2 sheets / 4 pages of A4 |
|
Primary Applications
|
Architectural blueprints, conference presentation boards, large flipcharts, theatrical event posters | Office spreadsheets, folded A4 booklets, ledger accounting, small posters |