Worked example
A 24 × 36 in poster, using an 8 × 10.5 in printable area and 0.25 in overlap, needs 4 columns and 4 rows: 16 sheets. The grid covers 31.25 × 41.25 in before the outer edges are trimmed.
Printable area is smaller than paper size
Printer margins can make the usable rectangle smaller than the physical sheet. Enter the actual printable width and height reported by your print workflow. For a different orientation, exchange those two values and compare the sheet count. This tool does not automatically rotate pages.
How overlap changes the grid
Only the first tile contributes its full dimension. Each following tile adds its printable dimension minus the overlap. The calculator rounds the needed number of tiles upward in both directions. Outer tiles may therefore contain blank area or need trimming; the grid coverage is not a request to enlarge the poster.
Use the print preview as the final check
Adobe Acrobat’s Poster workflow offers tile scale and overlap controls. This page estimates a simple rectangular grid and does not generate a PDF, cut marks or printer commands. Check the preview at the intended scale before printing. If the image needs more resolution at the finished size, use the DPI calculator separately.
Explore the related calculation
For a different starting point, try the image DPI calculator or return to the main calculator. Browse the complete tool directory for this site.
Reference and corrections
The definitions and assumptions above follow these sources; the examples and calculator arithmetic are original to this page.
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