Interactive poster calculator
A4 Poster Size and Sheet Calculator
Calculate how many A4 sheets are needed for a target poster size. The tool compares portrait and landscape A4 grids and shows the closest assembled dimensions.
A4 measures 210 × 297 mm before margins, so common 2 × 2 and 3 × 3 grids are straightforward to compare.
Interactive calculator
Enter your wall size and paper. We'll suggest the best layouts you can open directly in the editor.
I will print on
Each tile equals one A4 sheet (210×297mm).
Target wall size
Limits: up to 20 rows × 20 columns in the editor.
Recommended layouts (2 options)
Click a preview to open it in the editor.
Rows × Columns = number of printed sheets you will assemble.
Need more customization?
If you want to plan by tile count or explore more layouts, talk to ChatGPT PrintTiler AI.
Open ChatGPT PrintTiler AICommon A4 poster calculations
One A4 sheet measures 210×297mm before printer margins or overlap are considered.
2 × 2 portrait A4
Uses 4 sheets and measures about 420 × 594 mm before margins.
3 × 3 portrait A4
Uses 9 sheets and measures about 630 × 891 mm before margins.
4 × 3 portrait A4
Uses 12 sheets and measures about 630 × 1188 mm before margins.
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FAQ
How large is a 3 × 3 A4 poster?
With portrait sheets, the physical grid is about 630 × 891 mm before margins and overlap.
How many sheets are in a 4 × 3 A4 poster?
A 4-row by 3-column grid uses 12 A4 sheets.
Does the calculator change the PrintTiler editor?
No. It calculates a suggested paper grid and links to the existing editor with supported layout settings.
Do printer margins affect the final image area?
Yes. The physical sheet grid is easy to calculate, but the printable image area depends on printer margins and any overlap used for assembly.