Optimal Print Resolution for Poster Prints
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✅ Rule of Thumb
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300 DPI (dots per inch) is considered professional print quality.
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For large posters, 150 DPI is still acceptable (viewed from a distance).
🔹 Recommended File Sizes by Poster Size
Here’s a practical reference chart 👇
| Poster Size (inches) | Best Resolution (300 DPI) | Minimum Resolution (150 DPI) |
|---|---|---|
| 12 × 15 | 3600 × 4500 px | 1800 × 2250 px |
| 16 × 20 | 4800 × 6000 px | 2400 × 3000 px |
| 20 × 30 | 6000 × 9000 px | 3000 × 4500 px |
| 24 × 36 | 7200 × 10800 px | 3600 × 5400 px |
| 30 × 40 | 9000 × 12000 px | 4500 × 6000 px |
| 40 × 60 | 12000 × 18000 px | 6000 × 9000 px |