How Many A4, A3, or Letter Sheets for a 60x90 cm Poster?

A 60x90 cm poster is a practical wall size: large enough to read from across a room, but still possible to print at home if you split it across normal sheets.

For a 60x90 cm poster, the usual sheet count is:

Bottom line: A3 uses the fewest pages. A4 and Letter both need 12 sheets for this poster size.

Open Rasterbator.pics

Rasterbator.pics prepares tiled poster PDFs locally in your browser, so your image is handled on your device while you choose the final size and paper layout.

Home printers leave white borders

Most home and office printers cannot print all the way to the paper edge. They usually leave a 3-5 mm unprintable white border around each sheet.

That border does not usually change the sheet count for a 60x90 cm poster, but it does affect assembly:

• Some white edges need trimming.

• Neighboring sheets need careful alignment.

• A small overlap makes joins easier.

• The PDF must be printed at Actual Size or 100%.

Treat the sheet count as the planning number, then allow extra time for trimming and joining.

How the sheet count is calculated

This guide assumes a portrait poster: 60 cm wide and 90 cm tall.

The basic calculation is:

1. Divide the poster width by the paper width.

2. Divide the poster height by the paper height.

3. Round each result up to the next whole sheet.

4. Multiply sheets across by sheets down.

These estimates use the full physical paper dimensions. In a real tiled PDF, overlap, crop marks, and printer margins can slightly change the visible assembled area, but the practical page count remains the same for normal home printing.

A4 paper: 12 sheets

A4 paper measures 21 x 29.7 cm.

For a 60x90 cm poster:

• Width: 60 cm / 21 cm = 2.86, so round up to 3 sheets.

• Height: 90 cm / 29.7 cm = 3.03, so round up to 4 sheets.

That gives:

3 x 4 = 12 A4 sheets

A4 is the easiest option in many countries because the paper is cheap and widely available. The tradeoff is assembly time: 12 sheets means more seams to trim and align.

A3 paper: 9 sheets

A3 paper measures 29.7 x 42 cm.

For a 60x90 cm poster:

• Width: 60 cm / 29.7 cm = 2.02, so round up to 3 sheets.

• Height: 90 cm / 42 cm = 2.14, so round up to 3 sheets.

That gives:

3 x 3 = 9 A3 sheets

A3 is usually the most convenient layout if your printer supports it. You print fewer pages, trim fewer edges, and have fewer joins across the finished poster.

Letter paper: 12 sheets

Letter paper measures 21.6 x 27.9 cm.

For a 60x90 cm poster:

• Width: 60 cm / 21.6 cm = 2.77, so round up to 3 sheets.

• Height: 90 cm / 27.9 cm = 3.23, so round up to 4 sheets.

That gives:

3 x 4 = 12 Letter sheets

Letter is the practical choice for many home printers in the United States and Canada. The page count matches A4, but the slightly shorter page height can make trimming and overlap feel a little different.

A4, A3, and Letter compared

Choose the paper size based on the printer you actually have.

Use A4 if:

• Your printer only supports standard office paper.

• You already have A4 sheets at home or school.

• You are comfortable assembling 12 pages.

• You want the lowest-cost test print.

Use A3 if:

• Your printer supports larger sheets.

• You want fewer cuts and fewer seams.

• The poster needs to look cleaner up close.

• You are printing a display that will stay up for a while.

Use Letter if:

• Your printer is loaded with 8.5 x 11 inch paper.

• You are printing in the U.S. or Canada.

• You want the simplest local paper choice.

Print at Actual Size or 100%

After the tiled PDF is generated, print it without extra scaling.

Use one of these settings:

• Actual Size

• 100%

• No scaling

Avoid:

• Fit to Page

• Shrink to Printable Area

• Scale to Fit

• Fill entire paper

Scaling is the most common reason tiled posters do not line up. If a PDF page is printed at 96%, every tile becomes slightly smaller, and the assembled poster will not measure 60x90 cm.

Print one test tile first if the final size matters.

Trimming and assembly tips

You will need:

• Printed sheets

• Ruler

• Craft knife, scissors, or paper trimmer

• Cutting mat or spare cardboard

• Glue stick

• Tape for the back side

• Large table or clean floor

Lay out all pages before cutting. Check that the rows and columns are in order, then trim only the edges required for clean joins.

For easy assembly:

1. Keep the first sheet in a row as your anchor.

2. Trim the joining edge of the next sheet.

3. Overlap by about 2-3 mm, or follow the overlap guides in your PDF.

4. Attach with glue stick or tape from the back.

5. Finish each row before joining rows together.

Avoid glossy tape on the front. It catches light and makes seams more visible. Back-side tape is stronger and cleaner.

Checklist before you hit Print

• The poster size is set to 60x90 cm.

• The paper size matches the sheets loaded in your printer.

• You know the expected count: 12 A4, 9 A3, or 12 Letter sheets.

• The tiled PDF preview shows the correct number of rows and columns.

• Scale is set to Actual Size, 100%, or No scaling.

• Fit, Shrink, Fill, and Scale to Fit are off.

• One test page has been printed if exact size matters.

• You expect a 3-5 mm unprintable border on most home printers.

• You have trimming tools, glue stick, and back-side tape ready.

• All pages are sorted before assembly.

Acrobat Reader Poster mode can also work

Adobe Acrobat Reader has a Poster feature that can split a large PDF page across multiple sheets. If you already have a 60x90 cm PDF, set Tile Scale to 100% and check the preview before printing.

For image-based posters, Rasterbator.pics is often simpler because you choose the image, poster size, paper, overlap, crop marks, and PDF export in one browser workflow.

The rule is the same either way: create the tiled layout first, then print the finished pages without extra scaling.