Side-by-Side Comparison
A-Series (ISO 216)
A3 vs. A5
Comparing 2 standards across 7 specifications. 6 key differences identified.
Comparing:
A3
A5
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.
A5 is an ISO 216 standard paper size measuring 148 × 210 mm (5.83 × 8.27 inches), created by cutting or folding an A4 sheet in half. It is the dominant global format for commercial spiral notebooks, daily planners, paperback novels, corporate marketing flyers, and restaurant menus.
Specification Comparison Table
7 Parameters| Parameter / Spec | ||
|---|---|---|
|
Width × Height (Metric)
|
297 × 420 mm | 148 × 210 mm |
|
Width × Height (Imperial)
|
11.7 × 16.5 in | 5.83 × 8.27 in |
|
Nominal Surface Area
|
0.125 m² (125,000 mm²) | 0.03125 m² (1/32 m² — 31,250 mm²) |
|
Exact Aspect Ratio
|
1 : √2 (1 : 1.4142) | 1 : √2 (1 : 1.4142) |
|
Weight of Standard 80 gsm Sheet
|
10.0 grams | 2.5 grams |
|
Halving Relationship
|
Cut or folded in half yields 2 sheets / 4 pages of A4 | Cut in half yields 2 sheets of A6 |
|
Primary Applications
|
Office spreadsheets, folded A4 booklets, ledger accounting, small posters | Stationery notebooks (Moleskine, Rhodia), marketing flyers, paperback booklets, event programs |