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Poster Size Calculator

Check standard poster sizes and the pixel dimensions they need.

Your files stay on your deviceNo signup requiredNo watermarkFree browser-based tools
Target DPI

Print size

Print size (inches)18 × 24 in
Print size (centimeters)45.72 × 60.96 cm
Required pixel dimensions2700 × 3600 px

How it works

  1. Pick a standard poster size.
  2. Choose a DPI.
  3. Read the required pixel dimensions.

pixels = print size in inches × DPI. Posters are typically viewed from further away than photo prints, so a lower DPI often still looks sharp.

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Related guides

Poster Sizes in Pixels at 300 DPI

Pixel dimensions for every standard poster size, from 8×10 to 24×36 and A-series.

A4 Size in Pixels at 300 DPI

Exact A4 pixel dimensions at 300 DPI, plus a comparison across common PPI values.

FAQ

What DPI should I use for a poster?

Posters viewed from a distance can often use 150 DPI or even lower and still look sharp, since the viewing distance is greater than a handheld photo print. Use 300 DPI if the poster will be viewed up close.