comparison
A4 vs A5
Use A4 when you need a full document, form, worksheet, or letter-sized handout. Use A5 when you need a compact flyer, booklet page, insert, or handout that is about half the area of A4.
Last checked: 2026-05-03
How we calculate this
Methodology and source handling
We compare dimensions, aspect ratio, area difference, and crop risk so the page answers which size fits the job.
Quick answer
Copy-ready answer
Use A4 when you need a full document, form, worksheet, or letter-sized handout. Use A5 when you need a compact flyer, booklet page, insert, or handout that is about half the area of A4.
Dimensions and specs
| A4 | 210 x 297 mm; 2480 x 3508 px at 300 DPI; 1:1.414 | |
|---|---|---|
| A5 | 148 x 210 mm; 1748 x 2480 px at 300 DPI; 1:1.419 |
Formula
How to calculate this size
Convert physical size to inches, then multiply each side by the target PPI.
Match the target aspect ratio before exporting to avoid unexpected crop or padding.
Add bleed to both sides of each dimension before calculating the final canvas.
Common mistakes
Avoid these a4 vs a5 problems
Confirm whether the final output is print, upload, screen, or a template.
A size mismatch creates crop, padding, or distortion at export.
Confirm sources, limits, and output settings before sending the file onward.
Workflow
Use A4 vs A5 in a finished file
Start with where the file will be printed, uploaded, displayed, or delivered.
Use the dimensions, pixel target, aspect ratio, and formula before building the file.
Preview the final file against the required size, crop behavior, and source notes.
Decision
Which one should you use?
Use A4 for standard letters, worksheets, menus, posters, forms, certificates, and PDFs where the reader needs room for full-page content.
Use A5 for compact handouts, flyers, booklet pages, inserts, small menus, and designs that should feel portable or folded from A4.
Compare
Dimensions and area
| Size | Dimensions | 300 DPI pixels | Area implication |
|---|---|---|---|
| A4 | 210 x 297 mm | 2480 x 3508 px | About twice the area of A5 |
| A5 | 148 x 210 mm | 1748 x 2480 px | About half an A4 sheet |
Guidance
Crop and layout implications
A4 and A5 share the ISO A-series proportion closely, so resizing between them usually preserves the composition better than switching to US Letter or a photo ratio.
If you shrink A4 artwork to A5, increase type size before export so body copy remains readable.
Related
Related pages and tools
Same branch
Nearby pages
References
Sources and references
Dimensions come from PixelMeasures reference entries and listed source documentation. Area, aspect-ratio, and crop implications are calculated editorial guidance.
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ISO 216 paper size reference
Source for A-series paper dimensions.
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Adobe Photoshop Help: Set image size and resolution
Used for DPI/PPI and raster size interpretation.
Last checked: 2026-05-03