Poster Size in Pixels
Pixels needed = print size in inches × DPI. Or enter your image's pixels to see how sharp it is when placed, without turning it, in the poster width and height you enter. That is the same placement the poster tiler uses.
How much DPI do I need?
| Effective DPI | Typical result |
|---|---|
| 300 | Photo quality, sharp up close |
| 150–200 | Good for posters viewed at arm's length or more |
| 100 | Fine from across a room |
| Under 100 | Visible softness or pixels up close |
These are general guidelines, not a standard. Viewing distance matters more than a single number.
Example
A 4000 × 3000 px photo printed at 24 × 18 in gives 4000 ÷ 24 ≈ 167 DPI, which is good for a wall poster.
The poster tiler uses this same upright placement when you load an image. See common sizes in the poster sizes chart.
Frequently asked questions
How do I convert a poster size to pixels?
Multiply each side in inches by the DPI. An 18 by 24 inch poster at 150 DPI needs 2700 by 3600 pixels.
What DPI should a home poster use?
About 150 DPI is a practical target when the poster is viewed from a short distance. 300 DPI stays sharp up close. Under 100 DPI often looks soft.
Does this match the poster tool?
Yes. The fitted DPI uses the same upright placement as the home page tool. The image is scaled to fit inside the width and height, and it is not rotated.